[Lift] Re: How to handle refresh with S.redirectTo with state?

[marius d.]

Not at all. They are safe.

On May 3, 9:49 pm, "Bryan."  wrote:
> Would that mean that the state of the RequestVar could accidentally be
> shared with multiple requests?
>
> On May 3, 1:51 pm, "marius d."  wrote:
>
> > Hmmm ... the code seems to be fine (as far as I can tell from the code
> > snippet)
>
> > Can you perhaps declare your RequestVars outside of Cars scope?
>
> > just
>
> > object locationQuery extends RequestVar[Box[LocationQuery]](Empty)
>
> > class Cars {
> >   ...
>
> > }
>
> > .. personally I would avoid using open_! unless I'm really sure that
> > the Box is not Empty.
>
> > Br's,
> > Marius
>
> > On May 3, 7:08 pm, "Bryan."  wrote:
>
> > > I believe I am doing #1 now with no luck.  Let me know if this is
> > > correct:
>
> > > class Cars {
> > >   // ...
> > >   object locationQuery extends RequestVar[Box[LocationQuery]](Empty)
>
> > >   def search(xhtml: NodeSeq): NodeSeq = {
> > >     def processSearch() = {
> > >       // ...
> > >       val lq = new LocationQuery(validPickupDate.open_!,
> > > validDropoffDate.open_!, city, city)
> > >       S.redirectTo("/select", () => { locationQuery(Full(lq));
> > > requestReference(Full(requestRef)) })
> > >     }
>
> > >     // binds are here
> > >   }
>
> > >   def selectedLocation(xhtml: NodeSeq): NodeSeq = {
> > >     if (locationQuery.isDefined) {
> > >       val selectedCity = locationQuery.open_!.pickupLocation
> > >       Text(selectedCity.name + ", " + selectedCity.region)
> > >     } else {
> > >       Text("")
> > >     }
> > >   }
>
> > >   // ...
>
> > > }
>
> > > Thanks,
> > > Bryan
>
> > > On May 3, 11:46 am, "marius d."  wrote:
>
> > > > Oh.. 1 & 2 are unrelated ... just slightly different approaches.
>
> > > > On May 3, 6:45 pm, "marius d."  wrote:
>
> > > > > Well instead of open_1 use openOr so that you wont get exceptions when
> > > > > the Box is Empty. Also if you want when you to the redirect you could
> > > > > propagate those RequestsVars as well so that your browser re-send
> > > > > them. Now sure if this is what you'd want but should help avoiding
> > > > > Empty request vars. But what I'd do is:
>
> > > > > 1. Since you are doing redirect with state in the function passed to
> > > > > S.redirectTo you can set relevant values to your RequestVar's .. hence
> > > > > when your page is rendered your request vars have the old values
> > > > > potentially.
> > > > > 2. Use a StatefulSnippet and call redirectTo from the StatefulSnippet
> > > > > not S. Hence you can save state inside your snippet and when redirect
> > > > > happens, the same snippet instance would be used.
>
> > > > > Br's,
> > > > > Marius
>
> > > > > On May 3, 6:08 pm, Bryan  wrote:
>
> > > > > > I have a snippet that calls S.redirectTo with state.  In this same
> > > > > > snippet class I have a few functions to show the values of the
> > > > > > processed RequestVar's.  This works fine until I refresh the page,
> > > > > > because in these functions I call .open_! on some now Empty
> > > > > > RequestVar's.  It is simple enough to show Text("") when the box is
> > > > > > not Full, but now I have a problem with the page not showing useful
> > > > > > data.
>
> > > > > > What are some suggestions for handling this?  Should I just add code
> > > > > > to each of my many snippet functions to redirect to "/" when the
> > > > > > RequestVar's are empty?
>
> > > > > > Thanks,
> > > > > > Bryan
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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Charles F. Munat]

James,

This looks more like about $20, but I'm not complaining. Your thoughts 
mirror mine in many ways. #4 is a very good idea. Even just a list of 
what is needed. Folks could add to a documentation wishlist, and then 
anyone who thought he or she could tackle an item could just do it.

I'm glad that people are finally responding to this thread. I was 
beginning to think that I was on my own...

Chas.

James Matlik wrote:
> Hello Charles,
> 
> This is good news.  I'm sorry I didn't see your initial email going out, 
> but I would guess it is better late than never.  I think the first thing 
> that needs to be done is to clearly define what is to be documented in 
> the wiki and where.  Here is my 2 cents:
> 
>1. There should be a page linked to the wiki's main page providing
>   marketing style information.  This could be a kind of "About Lift"
>   page on steroids.  What makes Lift novel?  What features does it
>   provide that simplify the state of the art in web development? 
>   How easily can the technology be integrated with legacy
>   deployments?  What design goals does Lift strive for and why? 
>   Does Lift have a viable future?  What is Lift's stance on KIR
>   support?  Once an official release is made public, will bug fixes
>   be applied to that version going forward and for how long?  How
>   stable is the API?
>2. A brief description of the Lift culture could be beneficial; a
>   kind of "welcome to the party, this is how we roll" for the
>   uninitiated (I'm still figuring it out). 
>3. Make a clearly defined section for people developing applications
>   with Lift.  Give a 100ft view of the code/compile/deploy/test
>   development cycle, then delve into the tools that make this cycle
>   simpler.  Provide the basics on Maven, what it is, what it does
>   for Lift, and the commands of interest for Lift development. 
>   Describe how Maven is not required for the Maven adverse, and
>   provide instructions on how to proceed without Maven (maybe an
>   opportunity for sbaz?).  Up-to-date HowTo documents on standing up
>   different editors (Nebeans, Eclipse, Idea, etc.) are important.
>   How should Lift be deployed?  What are the required dependencies? 
>   Is it reasonable to simply use Maven's jetty:run target for a
>   production deployment?  What are the common configuration settings
>   for various servlet containers for development vs. production
>   deployments.  What architectures should be used for scaling out
>   deployments for redundancy and performance (serialization,
>   Terracotta, load balancing, etc.)?  Development, deployment and
>   KIR overview for those familiar with Rails but not with Java.
>4. A documentation TODO list for people to contribute.
>5. Are there any best practices?  Some good topics could be I18N, how
>   to avoid introducing security vulnerabilities like cross site
>   scripting or SQL injection attacks, how best to leverage templates
>   for CMS-like systems with very large numbers of unique pages vs.
>   applications with a relatively short list of screens, security and
>   performance tuning.
>6. There needs to be a very clear division between documentation for
>   public reference and works in progress/new feature collaboration
>   that would only confuse people. 
>7. There is a lot of good example code in the lift demo app.  It
>   might be nice to provide some supplemental annotated documentation
>   in the wiki (a lot of people don't turn to the code by default). 
>   This could be a kind of "recipes for Lift" section that could
>   contain all kinds of examples including those in the demo app.  As
>   people contribute creative solutions or solutions to common
>   problems, they could eventually be pulled into the demo app.
> 
> I'm sure some of this already exists on the wiki, but it would nice if 
> the navigation made it easier to find. 
> 
> As for registering with the wiki, could OpenID be supported for the wiki 
> account?  I'm seriously tired of creating new accounts all the time with 
> the same unchanging handful of passwords that I regularly have to cycle 
> through when accessing my account.  I'd like to see OpenID implemented 
> everywhere.
> 
> On Tue, Apr 21, 2009 at 3:38 PM, Charles F. Munat  > wrote:
> 
> 
> I am charged with coming up with a site map/information architecture for
> our hopefully-soon-to-be-updated wiki.
> 
> What would most benefit you on a documentation wiki? What sorts of
> things are you having the most problems with?
> 
> Please submit suggestions for a wiki outline, as well as any other ideas
> you have. For example, ideas on wiki structure are welcome. You could
> even suggest your own outline.
> 
> Please participate! Yes, you, lurker! We want to know what you need

[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Charles F. Munat]

Tom,

Thanks for this link! The Second Life wiki is very interesting, and 
makes it obvious that one can do a lot with MediaWiki. I'll definitely 
spend some time exploring it.

Chas.

Tom Arnold wrote:
> Hello List!
> 
> I might as well share my thoughts about docs.
> 
> I think as with Scala and Lift you should try to beat the best that is 
> out there. And from all the user made language/API/framework wikis I 
> have seen the one from a  now pretty unpopular game is by far the best: 
> http://wiki.secondlife.com/wiki/LSL_Portal   It is one page and you have 
> _all_ the infos you need. Everything. Even in different languages. And 
> _EVERY_ function as good exampleS to go along with it. That wiki is way 
> better than any other IMNSHO. _Easily_ beats the ROR wiki.  You just go 
> to that page and boom you get everything there is to know PERIOD No 
> unanswered questions.
> I hope the current API docs will be integrated into the wiki. Because 
> those sure are not newbie friendly and lack explaination and examples.
> 
> With similar docs lift will be the most popular web framework in no 
> time, but I think with mandatory registration it will not happen. That 
> does not scale and discourages people. At some point you need a real 
> wiki (one that everyone can edit.)
> 
> Cheers,
> 
> - Tom -
> 
>  
> 
> > 

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[David Pollak]

On Sun, May 3, 2009 at 4:11 PM, Daniel Guryca  wrote:

> I have just tried mvn -Drun.mode=production jetty:run  ... but sadly still
> getting same performance.


I ran a simple test (the same command line as you) on my 2.67 Ghz Core i7
machine and saw 600 pages per second.  Granted, my machine's faster, but not
10x.

I'll spend some time putting together a complete benchmark tomorrow so we
can share the same executable and hopefully see the same results.


>
>
> Daniel
>
>
> On Sun, May 3, 2009 at 3:31 PM, David Pollak <
> feeder.of.the.be...@gmail.com> wrote:
>
>>
>>
>> On Sun, May 3, 2009 at 6:18 AM, Daniel Guryca  wrote:
>>
>>> Hi David,
>>>
>>> Thank you for your reply.
>>>
>>> How and where can I set production vs development mode in lift ?
>>
>>
>> Set the "run.mode" system property to "production"  I do that with
>> -Drun.mode=production when I start Jetty, but you may do it differently.
>>
>> Also, In the basic app, there's an RDBMS request for the User object on
>> each page load and if you've got Derby configured, that's going to slow
>> things down.
>>
>>
>>
>>>
>>> Thank you again.
>>> Daniel
>>>
>>> On Sun, May 3, 2009 at 3:12 PM, David Pollak <
>>> feeder.of.the.be...@gmail.com> wrote:
>>>
 Are you running Lift in production or development mode?
 I typically see 300 pages/second to 800 pages/second when I do
 benchmarks on dual core opteron machines.

 I'll look into this, but you should be seeing north of 300 pages per
 second with simple pages in Lift.


 On Sat, May 2, 2009 at 1:32 PM, Dunsun  wrote:

>
> Hi,
>
> I'm very new to lift and scala.
>
> I have made some Grails intranet applications but sadly Grails or
> better say GSP rendering part which is completely written in Groovy is
> a very slow beast (even in comparison with Rails or Django).
>
> For my future big project (heavy loaded site) I need something much
> faster.
>
> So I have made some quick and dirty Lift benchmarks using ApacheBench
> + Tomcat, GlassFish (from netbeans) and even Jetty.
> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>
> LIFT BASIC SAMPLE:
> ab -c 10 -n 3000
> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
> 50 req/s
>
> LIFT BLANK SAMPLE:
> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
> 120 req/s
>
> Obtained numbers were similar for all 3 servers.
>
> Using Stripes and rendering similar simple pages I'm getting much much
> higher scores (600 req/s).
> Using Grails I'm getting little worse results but I would say it is
> same league.
> I would expect much better performance from Lift which is written in
> scala.
>
> Why am I getting these low numbers ?
> Am I doing something wrong ?
> Any suggestion is very welcome.
>
> regards
> Daniel
>
>
>


 --
 Lift, the simply functional web framework http://liftweb.net
 Beginning Scala http://www.apress.com/book/view/1430219890
 Follow me: http://twitter.com/dpp
 Git some: http://github.com/dpp



>>>
>>>
>>>
>>
>>
>> --
>> Lift, the simply functional web framework http://liftweb.net
>> Beginning Scala http://www.apress.com/book/view/1430219890
>> Follow me: http://twitter.com/dpp
>> Git some: http://github.com/dpp
>>
>>
>>
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Is there a bulk update function ?

[sailormoo...@gmail.com]

Hi :

  From the Lift Book, there is a bulk delete function.

Expense.bulkDelete_!!(By_<(Expense.dateOf, date))

  However, I want a bulk update function, is there one or if I must to
update it one by one?
Thanks.

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[James Matlik]

Hello Charles,

This is good news.  I'm sorry I didn't see your initial email going out, but
I would guess it is better late than never.  I think the first thing that
needs to be done is to clearly define what is to be documented in the wiki
and where.  Here is my 2 cents:


   1. There should be a page linked to the wiki's main page providing
   marketing style information.  This could be a kind of "About Lift" page on
   steroids.  What makes Lift novel?  What features does it provide that
   simplify the state of the art in web development?  How easily can the
   technology be integrated with legacy deployments?  What design goals does
   Lift strive for and why?  Does Lift have a viable future?  What is Lift's
   stance on KIR support?  Once an official release is made public, will bug
   fixes be applied to that version going forward and for how long?  How stable
   is the API?
   2. A brief description of the Lift culture could be beneficial; a kind of
   "welcome to the party, this is how we roll" for the uninitiated (I'm still
   figuring it out).
   3. Make a clearly defined section for people developing applications with
   Lift.  Give a 100ft view of the code/compile/deploy/test development cycle,
   then delve into the tools that make this cycle simpler.  Provide the basics
   on Maven, what it is, what it does for Lift, and the commands of interest
   for Lift development.  Describe how Maven is not required for the Maven
   adverse, and provide instructions on how to proceed without Maven (maybe an
   opportunity for sbaz?).  Up-to-date HowTo documents on standing up different
   editors (Nebeans, Eclipse, Idea, etc.) are important. How should Lift be
   deployed?  What are the required dependencies?  Is it reasonable to simply
   use Maven's jetty:run target for a production deployment?  What are the
   common configuration settings for various servlet containers for development
   vs. production deployments.  What architectures should be used for scaling
   out deployments for redundancy and performance (serialization, Terracotta,
   load balancing, etc.)?  Development, deployment and KIR overview for those
   familiar with Rails but not with Java.
   4. A documentation TODO list for people to contribute.
   5. Are there any best practices?  Some good topics could be I18N, how to
   avoid introducing security vulnerabilities like cross site scripting or SQL
   injection attacks, how best to leverage templates for CMS-like systems with
   very large numbers of unique pages vs. applications with a relatively short
   list of screens, security and performance tuning.
   6. There needs to be a very clear division between documentation for
   public reference and works in progress/new feature collaboration that would
   only confuse people.
   7. There is a lot of good example code in the lift demo app.  It might be
   nice to provide some supplemental annotated documentation in the wiki (a lot
   of people don't turn to the code by default).  This could be a kind of
   "recipes for Lift" section that could contain all kinds of examples
   including those in the demo app.  As people contribute creative solutions or
   solutions to common problems, they could eventually be pulled into the demo
   app.

I'm sure some of this already exists on the wiki, but it would nice if the
navigation made it easier to find.

As for registering with the wiki, could OpenID be supported for the wiki
account?  I'm seriously tired of creating new accounts all the time with the
same unchanging handful of passwords that I regularly have to cycle through
when accessing my account.  I'd like to see OpenID implemented everywhere.

On Tue, Apr 21, 2009 at 3:38 PM, Charles F. Munat  wrote:

>
> I am charged with coming up with a site map/information architecture for
> our hopefully-soon-to-be-updated wiki.
>
> What would most benefit you on a documentation wiki? What sorts of
> things are you having the most problems with?
>
> Please submit suggestions for a wiki outline, as well as any other ideas
> you have. For example, ideas on wiki structure are welcome. You could
> even suggest your own outline.
>
> Please participate! Yes, you, lurker! We want to know what you need.
>
> I'll collect all the ideas this weekend, consolidate them, and present a
> suggested outline (road map) for the documentation wiki.
>
> Thanks!
>
> Yes! If you are reading this, then I am talking to you. Speak up.
>
> Chas.
>
> >
>

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[Lift] Re: Article about URL rewriting in Lift

[Andrew Scherpbier]

Wow, this is awesome!  Can a link to this be provided from the 
wiki/getting started guide/api docs?

--Andrew

Timothy Perrett wrote:
> Guys,
>
> Thought people might find this an interesting article about lift's URL
> rewriting system and help out some newbies :-)
>
> http://is.gd/wq4K
>
> Cheers, Tim
> >   


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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[Daniel Guryca]

I have just tried mvn -Drun.mode=production jetty:run  ... but sadly still
getting same performance.

Daniel

On Sun, May 3, 2009 at 3:31 PM, David Pollak
wrote:

>
>
> On Sun, May 3, 2009 at 6:18 AM, Daniel Guryca  wrote:
>
>> Hi David,
>>
>> Thank you for your reply.
>>
>> How and where can I set production vs development mode in lift ?
>
>
> Set the "run.mode" system property to "production"  I do that with
> -Drun.mode=production when I start Jetty, but you may do it differently.
>
> Also, In the basic app, there's an RDBMS request for the User object on
> each page load and if you've got Derby configured, that's going to slow
> things down.
>
>
>
>>
>> Thank you again.
>> Daniel
>>
>> On Sun, May 3, 2009 at 3:12 PM, David Pollak <
>> feeder.of.the.be...@gmail.com> wrote:
>>
>>> Are you running Lift in production or development mode?
>>> I typically see 300 pages/second to 800 pages/second when I do benchmarks
>>> on dual core opteron machines.
>>>
>>> I'll look into this, but you should be seeing north of 300 pages per
>>> second with simple pages in Lift.
>>>
>>>
>>> On Sat, May 2, 2009 at 1:32 PM, Dunsun  wrote:
>>>

 Hi,

 I'm very new to lift and scala.

 I have made some Grails intranet applications but sadly Grails or
 better say GSP rendering part which is completely written in Groovy is
 a very slow beast (even in comparison with Rails or Django).

 For my future big project (heavy loaded site) I need something much
 faster.

 So I have made some quick and dirty Lift benchmarks using ApacheBench
 + Tomcat, GlassFish (from netbeans) and even Jetty.
 My machine - AMD X2 @ 2500Mhz, 4 GB RAM

 LIFT BASIC SAMPLE:
 ab -c 10 -n 3000
 http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
 50 req/s

 LIFT BLANK SAMPLE:
 ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
 120 req/s

 Obtained numbers were similar for all 3 servers.

 Using Stripes and rendering similar simple pages I'm getting much much
 higher scores (600 req/s).
 Using Grails I'm getting little worse results but I would say it is
 same league.
 I would expect much better performance from Lift which is written in
 scala.

 Why am I getting these low numbers ?
 Am I doing something wrong ?
 Any suggestion is very welcome.

 regards
 Daniel



>>>
>>>
>>> --
>>> Lift, the simply functional web framework http://liftweb.net
>>> Beginning Scala http://www.apress.com/book/view/1430219890
>>> Follow me: http://twitter.com/dpp
>>> Git some: http://github.com/dpp
>>>
>>>
>>>
>>
>>
>>
>
>
> --
> Lift, the simply functional web framework http://liftweb.net
> Beginning Scala http://www.apress.com/book/view/1430219890
> Follow me: http://twitter.com/dpp
> Git some: http://github.com/dpp
>
> >
>

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Tom Arnold]

Hello List!

I might as well share my thoughts about docs.

I think as with Scala and Lift you should try to beat the best that is out
there. And from all the user made language/API/framework wikis I have seen
the one from a  now pretty unpopular game is by far the best:
http://wiki.secondlife.com/wiki/LSL_Portal   It is one page and you have
_all_ the infos you need. Everything. Even in different languages. And
_EVERY_ function as good exampleS to go along with it. That wiki is way
better than any other IMNSHO. _Easily_ beats the ROR wiki.  You just go to
that page and boom you get everything there is to know PERIOD No unanswered
questions.
I hope the current API docs will be integrated into the wiki. Because those
sure are not newbie friendly and lack explaination and examples.

With similar docs lift will be the most popular web framework in no time,
but I think with mandatory registration it will not happen. That does not
scale and discourages people. At some point you need a real wiki (one that
everyone can edit.)

Cheers,

- Tom -

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[Lift] Re: Netbeans 6.5 Out of Memory Error with 4MB file forces Eclipse for me

[jsm2prof]

David & Daniel,
Thank you very much.  I wish I had known but I did not know the JVM
has a 64kb limit.   I will have to rethink everything.   I really
wanted the XML to be program but I guess I will it will have to be a
separate data file.

On Apr 23, 7:52 am, David Pollak 
wrote:
> On Wed, Apr 22, 2009 at 10:12 AM, jsm2prof  wrote:
>
> > Dave,
> > Thanks for your suggestions.  Maybe when you understand what I am
> > trying to do you will have a different suggestion.
>
> I have the same suggestion, do not create a 4MB Scala source file.  Even if
> you can get it to edit in an IDE, it will not compile.  The JVM has a 64K
> byte limit per method, so there's no way that you're going to get a 4MB XML
> document to compile into a method anyway.
>
> Make the XML data and read it in at run-time.  Use Scala's XML re-write
> tools to modify the document before serving it.
>
> Please also see Daniel's excellent comments on this thread.
>
> Thanks,
>
> David
>
>
>
>
>
> > On Apr 22, 10:45 am, David Pollak 
> > wrote:
> > > On Tue, Apr 21, 2009 at 10:15 PM, jsm2prof 
> > wrote:
>
> > > > Netbeans 6.5 gave me an Out of Memory Error when I loaded a 4MB
> > > > file.
>
> > > If you've got a 4MB scala source code file, I'd suggest refactoring a
> > little
> > > bit.
>
> > 26 years ago when I was as young and smart as you are now, I
> > refactored a program that only ran on a multi-million dollar computer
> > so that it ran on a home assembled floppy based desktop.   But, I do
> > not think refactoring would be the best solution now.
>
> > > If it's a 4MB text file, you'd likely be better served with vi or Emacs
> > > anyway... they're much better at dealing with large files (especially
> > vi).
>
> > I use these a little but it is XML not really text and I do not want
> > to encourage users to use these tools in order to find information on
> > the web.
>
> > Actually, I also have a 24 MB XML data file that I would like to
> > include in a Scala program.   Once this works, then I would like to
> > publish it on a website as FLOSS so that anyone can see quick and easy
> > answers to any arbitrary thing they might want to know about this
> > data.  After that is done then I want to do it again several times
> > with the same data in different languages.
>
> > I believe I can encourage Scala/Lift usage by doing it this way and
> > eventually giving instructions so that beginners learn enough Scala/
> > Lift to do their searches easier than they could have done the search
> > with store bought software.
> > > >   I get much better help from Eclipse.  Scala is tops.  Lift
> > > > seems to be very good.   I only want to learn the things that are
> > > > best.   Would someone please kick Lift up to the status of playing
> > > > with the heavy weight?
>
> > > Lift is a web framework.  While we give input and feedback to the IDE
> > > maintainers (and they give us great support), the use of Lift is
> > independent
> > > of any IDE.  Perhaps you'd be best served by seeing what groups support
> > > NetBeans for non-Scala-related file types (once again, if you've got a
> > 4MB
> > > Scala file, there's some work that you need to do in terms of refactoring
> > > before asking for support).
>
> > Oracle just bought SUN.  I remember seeing Oracle in times past
> > pushing Eclipse.  I do not remember seeing Oracle in times past
> > pushing Netbeans to the same extent.  Eclipse does Python and many
> > other things that people used before we ever even heard of Scala/
> > Lift.  There are a some of us who learned some of Netbeans just in
> > order to do Scala/Lift.  There are many more who just would not learn
> > another IDE just for Scala/Lift.
>
> > I did not care for all of the extras necessary to use Java.  But when
> > Scala/Lift became available, I learned Maven because that was the only
> > way I could get a tiny web page to work with Lift.  I really had high
> > hopes that I could just use just one IDE, one programming language
> > (Scala), and one web framework (Lift).   I have learned hundreds of
> > different languages, compilers, editors, environments, and extras.  I
> > am sick and tired of it.
>
> > Please do whatever you can to move the largest Lift projects away from
> > multiple extras.
>
> > Thanks,
> > A lower level teacher
>
> > > Thanks,
>
> > > David
>
> --
> Lift, the simply functional web frameworkhttp://liftweb.net
> Beginning Scalahttp://www.apress.com/book/view/1430219890
> Follow me:http://twitter.com/dpp
> Git some:http://github.com/dpp

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[Lift] Re: Cannot access html files other than index.html in GAE using lift

[Dan Greening]

I just broke my teeth on this problem also (and 2 days wasted later I
discover this thread).  I would say "Doh!", but this is hardly a Doh
type of thing.

Security is important, but also as a new framework, you want rapid
uptake by people who won't read 5 chapters of a book before trying
something out.  Many of us (most of us?) read the minimum amount
before jumping in and trying something.

Here is my proposed user story:  As a new Lift user, I can copy-paste
lift-archetype-blank files into my existing web site and gradually add
Lift functionality while unmodified static and JSP content continues
to work.

Perhaps this could be done by having a simple method on SiteMap to
disable access control.  (And then use it in lift-archetype-blank,
with comments of course.)

Many people will likely do what I did, trying to figure out how to
turn on logging levels, etc. because the behavior they expect is not
what Lift delivers, and then they blame themselves for doing something
obviously stupid.  (But failing to read 5 chapters is not "obviously
stupid".)

Dan Greening

On Apr 23, 10:01 am, David Pollak 
wrote:
> On Thu, Apr 23, 2009 at 9:59 AM, Lee Mighdoll  wrote:
> > Ah, thanks for the explanation.
>
> > Perhaps a site map entry for /static in the default archtetype?
>
> K... added
>
>
>
>
>
> > Lee
>
> > On Thu, Apr 23, 2009 at 9:51 AM, David Pollak <
> > feeder.of.the.be...@gmail.com> wrote:
>
> >> On Thu, Apr 23, 2009 at 9:48 AM, Lee Mighdoll wrote:
>
> >>> Since lift is a servlet filter, can it simply pass through requests for
> >>> unmapped html pages and let the web container serve them or send a 404?  I
> >>> don't quite understand the security issue, though.
>
> >> Security issues:
>
> >>    - Serving "turd" pages left behind by the developers or from an older
> >>    version of the app
> >>    - Serving pages that can only be viewed if you're logged in
>
> >>> Lee
>
> >>> re: documentation, I tripped on this getting started as well.
>
> >>> On Thu, Apr 23, 2009 at 8:45 AM, David Pollak <
> >>> feeder.of.the.be...@gmail.com> wrote:
>
>  On Thu, Apr 23, 2009 at 8:30 AM, Andrew Scherpbier <
>  and...@scherpbier.org> wrote:
>
> > Hi kkarad,
> > I'm a fellow newbie to lift (and scala) and ran into the same issue.  I
> > believe the solution is simple:  You need to create entries in your
> > SiteMap for every page.  You'll need to do that in your Boot.scala.
> > Make them Hidden if you don't want them displayed in the menu; you
> > still
> > need those entries though.
>
> > I suggest reading chapter 5 in the "Exploring Lift" book that is
> > available as a draft PDF.
> > BTW, to the authors of that book:  I spent a lot of time trying to
> > figure out this exact same issue.  Could you make this more prominent?
> > Some examples of using multiple pages would be helpful.  Since the
> > SiteMap is so important, I think it would be good to add more coverage
> > of it in chapter 3.
>
>  Andrew,
>
>  Thanks for your comments.
>
>  There's a tension in Lift between quick & simple and maintainable &
>  secure.  SiteMap is a little heavier weight than simple routing tables 
>  (or
>  doing things by default).  On the other hand, SiteMap gives you security,
>  menu generation, bread crumbs, and much, much more.  Perhaps I'll add
>  something to the 404 when running in development mode (or bespin mode).
>
>  Thanks,
>
>  David
>
> > Cheers!
>
> > --Andrew
>
> > kkarad wrote:
> > > Hi all,
>
> > > I am new to lift web framework. Recently I started working on a test
> > > project using google app engine for java and lift. I followed the
> > > Atsuhiko Yamanaka's instructions and I was able to deploy and run the
> > > helloworld example on the google app cloud.
>
> > > The problem I am facing now is that I cannot access deployed html
> > > files other than the default (index.html). The problem occurs in the
> > > dev_appserver provided by the google app engine sdk.
>
> > > For instance, the fileupload.xthml file under the webapp folder
> > cannot
> > > be accessed using thehttp://localhost:8080/fileupload[or with the
> > > suffix]. The error message I get back is: The Requested URL / was not
> > > found on this server
>
> > > Due to my lack of lift knowledge I am not able to identify if its a
> > > lift or gae/j problem. Could you please help me?
>
> > > Bellow I include the content of web.xml, appengine-web.xml and the
> > > tree structue of the webapp folder in maven.
>
> > > 
> > >     
> > >         LiftFilter
> > >         Lift Filter
> > >         The Filter that intercepts lift calls > > description>
> > >         net.liftweb.http.LiftFilter
> > >     
>
> > >     
> > >         LiftFilter
> > >         /*
> > >     
>
> > >     
> > >         index.html
> > >     
>
> > >

[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Axel Rose]

Formalities or content?

http://wiki.liftweb.net/index.php/Maven_Mini_Guide
must be improved. For people not accustomed to maven it is very hard
to grasp the versions/release/snapshot/pom dependencies.

Various articles use various version numbers when building examples.
I, personally, got lost.


How does a user learns from reading the wiki how to register?


Regards
Axel

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[Lift] Re: How to handle refresh with S.redirectTo with state?

[Bryan.]

Would that mean that the state of the RequestVar could accidentally be
shared with multiple requests?

On May 3, 1:51 pm, "marius d."  wrote:
> Hmmm ... the code seems to be fine (as far as I can tell from the code
> snippet)
>
> Can you perhaps declare your RequestVars outside of Cars scope?
>
> just
>
> object locationQuery extends RequestVar[Box[LocationQuery]](Empty)
>
> class Cars {
>   ...
>
> }
>
> .. personally I would avoid using open_! unless I'm really sure that
> the Box is not Empty.
>
> Br's,
> Marius
>
> On May 3, 7:08 pm, "Bryan."  wrote:
>
> > I believe I am doing #1 now with no luck.  Let me know if this is
> > correct:
>
> > class Cars {
> >   // ...
> >   object locationQuery extends RequestVar[Box[LocationQuery]](Empty)
>
> >   def search(xhtml: NodeSeq): NodeSeq = {
> >     def processSearch() = {
> >       // ...
> >       val lq = new LocationQuery(validPickupDate.open_!,
> > validDropoffDate.open_!, city, city)
> >       S.redirectTo("/select", () => { locationQuery(Full(lq));
> > requestReference(Full(requestRef)) })
> >     }
>
> >     // binds are here
> >   }
>
> >   def selectedLocation(xhtml: NodeSeq): NodeSeq = {
> >     if (locationQuery.isDefined) {
> >       val selectedCity = locationQuery.open_!.pickupLocation
> >       Text(selectedCity.name + ", " + selectedCity.region)
> >     } else {
> >       Text("")
> >     }
> >   }
>
> >   // ...
>
> > }
>
> > Thanks,
> > Bryan
>
> > On May 3, 11:46 am, "marius d."  wrote:
>
> > > Oh.. 1 & 2 are unrelated ... just slightly different approaches.
>
> > > On May 3, 6:45 pm, "marius d."  wrote:
>
> > > > Well instead of open_1 use openOr so that you wont get exceptions when
> > > > the Box is Empty. Also if you want when you to the redirect you could
> > > > propagate those RequestsVars as well so that your browser re-send
> > > > them. Now sure if this is what you'd want but should help avoiding
> > > > Empty request vars. But what I'd do is:
>
> > > > 1. Since you are doing redirect with state in the function passed to
> > > > S.redirectTo you can set relevant values to your RequestVar's .. hence
> > > > when your page is rendered your request vars have the old values
> > > > potentially.
> > > > 2. Use a StatefulSnippet and call redirectTo from the StatefulSnippet
> > > > not S. Hence you can save state inside your snippet and when redirect
> > > > happens, the same snippet instance would be used.
>
> > > > Br's,
> > > > Marius
>
> > > > On May 3, 6:08 pm, Bryan  wrote:
>
> > > > > I have a snippet that calls S.redirectTo with state.  In this same
> > > > > snippet class I have a few functions to show the values of the
> > > > > processed RequestVar's.  This works fine until I refresh the page,
> > > > > because in these functions I call .open_! on some now Empty
> > > > > RequestVar's.  It is simple enough to show Text("") when the box is
> > > > > not Full, but now I have a problem with the page not showing useful
> > > > > data.
>
> > > > > What are some suggestions for handling this?  Should I just add code
> > > > > to each of my many snippet functions to redirect to "/" when the
> > > > > RequestVar's are empty?
>
> > > > > Thanks,
> > > > > Bryan

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[Lift] How would I call a template from another template?

[EmEhRKay]

Very simple idea - I have a tags template that I put in the templates-
hidden directory, it creates a list of tags. In one of my public
templates I want to be able to call that template to display the tags
(I'm sure it has been done before and I cannot find in either book
where this is covered). How would I do this?

Thanks

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[Lift] OT: consulting?

[Charles F. Munat]

Apologies for the sort-of off-topic post. Please reply offlist.

My current contract with the UW ends at the end of August, and I just 
learned last week that our proposal for a new contract missed approval 
by 8/100 point. Whoops.

So as of 1 September, I will be looking for Lift/Scala consulting work, 
or other Web/database/IT consulting work. (Guess I'd better hurry up and 
learn something, huh?)

**I am particularly interested in leaving Seattle (been here a decade -- 
too long), preferably for Europe or South America, but would consider 
Asia or (shudder) California.**

Anyone have any advice or suggestions? I know this is an international 
group. As I said, please email me offlist.

Thanks!

Chas.

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[Lift] Re: textarea overrides?

[Charles F. Munat]

I wasn't recommending it, just using it as an example. What you probably 
want is this:

http://dev.jquery.com/wiki/Plugins/tinyMCE

There's also a version for YUI, I think.

Chas.

Meredith Gregory wrote:
> Charles,
> 
> That's pretty cool. i'll give it a whirl. It's a little bulky, but bulk 
> can have it's merits (although i'm told it's not the meat, it's the 
> motion ;-).
> 
> Best wishes,
> 
> --greg
> 
> On Sun, May 3, 2009 at 6:20 PM, Charles F. Munat  > wrote:
> 
> 
> Do you mean a rich text editor? Something like TinyMCE?
> 
> http://tinymce.moxiecode.com/
> 
> Or something less bulky than that?
> 
> Chas.
> 
> Meredith Gregory wrote:
>  > Tyler, Charles,
>  >
>  > Thanks for the tip!
>  >
>  > i decided that it looks like i've intended for people to input more
>  > complex expressions. So, i've left the size the way it is. (You
> know in
>  > jazz when you play a wrong note once, it's a mistake, but if you keep
>  > hammering it, it's what you meant to do. i'm improvising, sort
> of. ;-)
>  > That begs another question, however. Is there a more complex text
> edit
>  > widge, like the one around the edit area in gmail. Is there a jquery
>  > widget that handles most of this?
>  >
>  > Best wishes,
>  >
>  > --greg
>  >
>  > On Sun, May 3, 2009 at 4:28 PM, Charles F. Munat  
>  > >> wrote:
>  >
>  >
>  > It's not likely, it IS blueprint, which in it's infinite
> wisdom, sets
>  > the height and width of textareas in pixels.
>  >
>  > You can override it generically in CSS, or you could add a
> class (or id)
>  > attribute to that specific textarea and then set it with CSS.
>  >
>  > (There are some things I really don't like about Blueprint,
> and default
>  > sizes on the textareas is at the top of my list.)
>  >
>  > Chas.
>  >
>  > TylerWeir wrote:
>  >  > If you're using the standard CSS, it's likely blueprint is
>  > controlling
>  >  > the size:
>  >  > http://blueprintcss.org/blueprint/src/forms.css
>  >  >
>  >  >
>  >  >
>  >  > On May 3, 6:16 pm, Meredith Gregory
> mailto:lgreg.mered...@gmail.com>
>  >  >> wrote:
>  >  >> Lifted,
>  >  >>
>  >  >> i gave up on trying to understand how to to the brain-dead
>  > simple version of
>  >  >> what i was trying to do and went for a more complex version.
>  > This works
>  >  >> (better, anyways). However, i notice that despite the
>  > instructions to render
>  >  >> the textarea with 1 row, it is rendering it with about 10
> rows.
>  > Anybody have
>  >  >> any clues as to why?
>  >  >>
>  >  >> 
>  >  >> R-E-P-L
>  >  >> 
>  >  >>   
>  >  >>   
>  >  >> Parse term
>  >  >> Evaluate term
>  >  >> Type term
>  >  >>   
>  >  >>   
>  >  >>   lambda
> x.x>
>  >  >>   
>  >  >>   Go
>  >  >>   
>  >  >>   
>  >  >> 
>  >  >> 
>  >  >>
>  >  >> Best wishes,
>  >  >>
>  >  >> --greg
>  >  >>
>  >  >> --
>  >  >> L.G. Meredith
>  >  >> Managing Partner
>  >  >> Biosimilarity LLC
>  >  >> 1219 NW 83rd St
>  >  >> Seattle, WA 98117
>  >  >>
>  >  >> +1 206.650.3740
>  >  >>
>  >  >> http://biosimilarity.blogspot.com
>  >  > >
>  >
>  >
>  >
>  >
>  >
>  > --
>  > L.G. Meredith
>  > Managing Partner
>  > Biosimilarity LLC
>  > 1219 NW 83rd St
>  > Seattle, WA 98117
>  >
>  > +1 206.650.3740
>  >
>  > http://biosimilarity.blogspot.com
>  >
>  > >
> 
> 
> 
> 
> 
> -- 
> L.G. Meredith
> Managing Partner
> Biosimilarity LLC
> 1219 NW 83rd St
> Seattle, WA 98117
> 
> +1 206.650.3740
> 
> http://biosimilarity.blogspot.com
> 
> > 

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[Lift] Re: textarea overrides?

[Meredith Gregory]

Charles,

That's pretty cool. i'll give it a whirl. It's a little bulky, but bulk can
have it's merits (although i'm told it's not the meat, it's the motion ;-).

Best wishes,

--greg

On Sun, May 3, 2009 at 6:20 PM, Charles F. Munat  wrote:

>
> Do you mean a rich text editor? Something like TinyMCE?
>
> http://tinymce.moxiecode.com/
>
> Or something less bulky than that?
>
> Chas.
>
> Meredith Gregory wrote:
> > Tyler, Charles,
> >
> > Thanks for the tip!
> >
> > i decided that it looks like i've intended for people to input more
> > complex expressions. So, i've left the size the way it is. (You know in
> > jazz when you play a wrong note once, it's a mistake, but if you keep
> > hammering it, it's what you meant to do. i'm improvising, sort of. ;-)
> > That begs another question, however. Is there a more complex text edit
> > widge, like the one around the edit area in gmail. Is there a jquery
> > widget that handles most of this?
> >
> > Best wishes,
> >
> > --greg
> >
> > On Sun, May 3, 2009 at 4:28 PM, Charles F. Munat  > > wrote:
> >
> >
> > It's not likely, it IS blueprint, which in it's infinite wisdom, sets
> > the height and width of textareas in pixels.
> >
> > You can override it generically in CSS, or you could add a class (or
> id)
> > attribute to that specific textarea and then set it with CSS.
> >
> > (There are some things I really don't like about Blueprint, and
> default
> > sizes on the textareas is at the top of my list.)
> >
> > Chas.
> >
> > TylerWeir wrote:
> >  > If you're using the standard CSS, it's likely blueprint is
> > controlling
> >  > the size:
> >  > http://blueprintcss.org/blueprint/src/forms.css
> >  >
> >  >
> >  >
> >  > On May 3, 6:16 pm, Meredith Gregory  > > wrote:
> >  >> Lifted,
> >  >>
> >  >> i gave up on trying to understand how to to the brain-dead
> > simple version of
> >  >> what i was trying to do and went for a more complex version.
> > This works
> >  >> (better, anyways). However, i notice that despite the
> > instructions to render
> >  >> the textarea with 1 row, it is rendering it with about 10 rows.
> > Anybody have
> >  >> any clues as to why?
> >  >>
> >  >> 
> >  >> R-E-P-L
> >  >> 
> >  >>   
> >  >>   
> >  >> Parse term
> >  >> Evaluate term
> >  >> Type term
> >  >>   
> >  >>   
> >  >>   lambda x.x>
> >  >>   
> >  >>   Go
> >  >>   
> >  >>   
> >  >> 
> >  >> 
> >  >>
> >  >> Best wishes,
> >  >>
> >  >> --greg
> >  >>
> >  >> --
> >  >> L.G. Meredith
> >  >> Managing Partner
> >  >> Biosimilarity LLC
> >  >> 1219 NW 83rd St
> >  >> Seattle, WA 98117
> >  >>
> >  >> +1 206.650.3740
> >  >>
> >  >> http://biosimilarity.blogspot.com
> >  > >
> >
> >
> >
> >
> >
> > --
> > L.G. Meredith
> > Managing Partner
> > Biosimilarity LLC
> > 1219 NW 83rd St
> > Seattle, WA 98117
> >
> > +1 206.650.3740
> >
> > http://biosimilarity.blogspot.com
> >
> > >
>
> >
>


-- 
L.G. Meredith
Managing Partner
Biosimilarity LLC
1219 NW 83rd St
Seattle, WA 98117

+1 206.650.3740

http://biosimilarity.blogspot.com

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[Lift] Re: textarea overrides?

[Charles F. Munat]

Do you mean a rich text editor? Something like TinyMCE?

http://tinymce.moxiecode.com/

Or something less bulky than that?

Chas.

Meredith Gregory wrote:
> Tyler, Charles,
> 
> Thanks for the tip!
> 
> i decided that it looks like i've intended for people to input more 
> complex expressions. So, i've left the size the way it is. (You know in 
> jazz when you play a wrong note once, it's a mistake, but if you keep 
> hammering it, it's what you meant to do. i'm improvising, sort of. ;-) 
> That begs another question, however. Is there a more complex text edit 
> widge, like the one around the edit area in gmail. Is there a jquery 
> widget that handles most of this?
> 
> Best wishes,
> 
> --greg
> 
> On Sun, May 3, 2009 at 4:28 PM, Charles F. Munat  > wrote:
> 
> 
> It's not likely, it IS blueprint, which in it's infinite wisdom, sets
> the height and width of textareas in pixels.
> 
> You can override it generically in CSS, or you could add a class (or id)
> attribute to that specific textarea and then set it with CSS.
> 
> (There are some things I really don't like about Blueprint, and default
> sizes on the textareas is at the top of my list.)
> 
> Chas.
> 
> TylerWeir wrote:
>  > If you're using the standard CSS, it's likely blueprint is
> controlling
>  > the size:
>  > http://blueprintcss.org/blueprint/src/forms.css
>  >
>  >
>  >
>  > On May 3, 6:16 pm, Meredith Gregory  > wrote:
>  >> Lifted,
>  >>
>  >> i gave up on trying to understand how to to the brain-dead
> simple version of
>  >> what i was trying to do and went for a more complex version.
> This works
>  >> (better, anyways). However, i notice that despite the
> instructions to render
>  >> the textarea with 1 row, it is rendering it with about 10 rows.
> Anybody have
>  >> any clues as to why?
>  >>
>  >> 
>  >> R-E-P-L
>  >> 
>  >>   
>  >>   
>  >> Parse term
>  >> Evaluate term
>  >> Type term
>  >>   
>  >>   
>  >>   lambda x.x>
>  >>   
>  >>   Go
>  >>   
>  >>   
>  >> 
>  >> 
>  >>
>  >> Best wishes,
>  >>
>  >> --greg
>  >>
>  >> --
>  >> L.G. Meredith
>  >> Managing Partner
>  >> Biosimilarity LLC
>  >> 1219 NW 83rd St
>  >> Seattle, WA 98117
>  >>
>  >> +1 206.650.3740
>  >>
>  >> http://biosimilarity.blogspot.com
>  > >
> 
> 
> 
> 
> 
> -- 
> L.G. Meredith
> Managing Partner
> Biosimilarity LLC
> 1219 NW 83rd St
> Seattle, WA 98117
> 
> +1 206.650.3740
> 
> http://biosimilarity.blogspot.com
> 
> > 

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[Lift] Re: textarea overrides?

[Meredith Gregory]

Tyler, Charles,

Thanks for the tip!

i decided that it looks like i've intended for people to input more complex
expressions. So, i've left the size the way it is. (You know in jazz when
you play a wrong note once, it's a mistake, but if you keep hammering it,
it's what you meant to do. i'm improvising, sort of. ;-) That begs another
question, however. Is there a more complex text edit widge, like the one
around the edit area in gmail. Is there a jquery widget that handles most of
this?

Best wishes,

--greg

On Sun, May 3, 2009 at 4:28 PM, Charles F. Munat  wrote:

>
> It's not likely, it IS blueprint, which in it's infinite wisdom, sets
> the height and width of textareas in pixels.
>
> You can override it generically in CSS, or you could add a class (or id)
> attribute to that specific textarea and then set it with CSS.
>
> (There are some things I really don't like about Blueprint, and default
> sizes on the textareas is at the top of my list.)
>
> Chas.
>
> TylerWeir wrote:
> > If you're using the standard CSS, it's likely blueprint is controlling
> > the size:
> > http://blueprintcss.org/blueprint/src/forms.css
> >
> >
> >
> > On May 3, 6:16 pm, Meredith Gregory  wrote:
> >> Lifted,
> >>
> >> i gave up on trying to understand how to to the brain-dead simple
> version of
> >> what i was trying to do and went for a more complex version. This works
> >> (better, anyways). However, i notice that despite the instructions to
> render
> >> the textarea with 1 row, it is rendering it with about 10 rows. Anybody
> have
> >> any clues as to why?
> >>
> >> 
> >> R-E-P-L
> >> 
> >>   
> >>   
> >> Parse term
> >> Evaluate term
> >> Type term
> >>   
> >>   
> >>   lambda x.x>
> >>   
> >>   Go
> >>   
> >>   
> >> 
> >> 
> >>
> >> Best wishes,
> >>
> >> --greg
> >>
> >> --
> >> L.G. Meredith
> >> Managing Partner
> >> Biosimilarity LLC
> >> 1219 NW 83rd St
> >> Seattle, WA 98117
> >>
> >> +1 206.650.3740
> >>
> >> http://biosimilarity.blogspot.com
> > >
>
> >
>


-- 
L.G. Meredith
Managing Partner
Biosimilarity LLC
1219 NW 83rd St
Seattle, WA 98117

+1 206.650.3740

http://biosimilarity.blogspot.com

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[Lift] Re: textarea overrides?

[Charles F. Munat]

It's not likely, it IS blueprint, which in it's infinite wisdom, sets 
the height and width of textareas in pixels.

You can override it generically in CSS, or you could add a class (or id) 
attribute to that specific textarea and then set it with CSS.

(There are some things I really don't like about Blueprint, and default 
sizes on the textareas is at the top of my list.)

Chas.

TylerWeir wrote:
> If you're using the standard CSS, it's likely blueprint is controlling
> the size:
> http://blueprintcss.org/blueprint/src/forms.css
> 
> 
> 
> On May 3, 6:16 pm, Meredith Gregory  wrote:
>> Lifted,
>>
>> i gave up on trying to understand how to to the brain-dead simple version of
>> what i was trying to do and went for a more complex version. This works
>> (better, anyways). However, i notice that despite the instructions to render
>> the textarea with 1 row, it is rendering it with about 10 rows. Anybody have
>> any clues as to why?
>>
>> 
>> R-E-P-L
>> 
>>   
>>   
>> Parse term
>> Evaluate term
>> Type term
>>   
>>   
>>   lambda x.x>
>>   
>>   Go
>>   
>>   
>> 
>> 
>>
>> Best wishes,
>>
>> --greg
>>
>> --
>> L.G. Meredith
>> Managing Partner
>> Biosimilarity LLC
>> 1219 NW 83rd St
>> Seattle, WA 98117
>>
>> +1 206.650.3740
>>
>> http://biosimilarity.blogspot.com
> > 

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[Lift] Re: textarea overrides?

[TylerWeir]

If you're using the standard CSS, it's likely blueprint is controlling
the size:
http://blueprintcss.org/blueprint/src/forms.css



On May 3, 6:16 pm, Meredith Gregory  wrote:
> Lifted,
>
> i gave up on trying to understand how to to the brain-dead simple version of
> what i was trying to do and went for a more complex version. This works
> (better, anyways). However, i notice that despite the instructions to render
> the textarea with 1 row, it is rendering it with about 10 rows. Anybody have
> any clues as to why?
>
> 
>     R-E-P-L
>     
>       
>       
>     Parse term
>     Evaluate term
>     Type term
>       
>       
>       lambda x.x>
>       
>       Go
>       
>       
>     
> 
>
> Best wishes,
>
> --greg
>
> --
> L.G. Meredith
> Managing Partner
> Biosimilarity LLC
> 1219 NW 83rd St
> Seattle, WA 98117
>
> +1 206.650.3740
>
> http://biosimilarity.blogspot.com
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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Charles F. Munat]

Thanks! Will do!

Chas.

Bryan. wrote:
> I'd like to help with the wiki as well.  Let me know if there is
> anything in particular that you would like me to do.
> 
> --Bryan
> 
> On May 3, 9:46 am, David Pollak  wrote:
>> On Sun, May 3, 2009 at 6:33 AM, Axel Rose 
>> wrote:
>>
>>
>>
>>
>>
>>> Hello Charles,
>>> I know I'm a bit late for your request to consolidate the lift wiki.
>>> Anyway:
>>> It's really puzzling to me to get the version numbers right, when creating
>>> a new
>>> archetype with maven.
>>> The Maven mini guide athttp://wiki.liftweb.net/index.php/Maven_Mini_Guide
>>> is not so helpful.
>>> Perhaps it would be good to color the version numbers and clearly state
>>> what
>>> will be downloaded from maven and what to do if I wanted to use snapshots.
>>> Does pom.xml need to be changed?
>>> A howto for Google App Engine usage is missing. Here I'd need to use
>>> snapshots.
>>> Also:
>>> Make it easier for guests to put suggestions into the wiki. I'm too
>>> lazy to register.
>> We've done just the opposite.  You can only get an account if you make a
>> request (Derek and I create the accounts).  We've had far too much
>> wiki vandalism and are clamping down by making sure everybody who has
>> write-access to the wiki is willing to ask for an account.
>>
>>
>>
>>> Regards,
>>> Axel.
>> --
>> Lift, the simply functional web frameworkhttp://liftweb.net
>> Beginning Scalahttp://www.apress.com/book/view/1430219890
>> Follow me:http://twitter.com/dpp
>> Git some:http://github.com/dpp
> 
> > 

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Charles F. Munat]

Thanks, Richard. Very helpful.

Chas.

richard.car...@me.com wrote:
> My personal view is that a worked example of a fully featured
> eCommerce type site would be most useful. Even something as simple as
> a cut down Amazon style store with inventory management would be a
> great start. That would be a useful foundation for the rest of Lift's
> features (add-ons such as online chat style help).
> 
> I'm looking at technologies for rewriting a web site with a lot of
> dynamic content, currently written entirely in Java 1.4 and JSPs.
> Scala and Lift look promising, but the lack of documentation and non
> trivial worked examples mean that despite Lift's "1.0" status, I don't
> feel I could use it in its current form.
> 
> Hope this is of some help,
> 
> Regards
> 
> Richard
> 
> > 

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[Lift] textarea overrides?

[Meredith Gregory]

Lifted,

i gave up on trying to understand how to to the brain-dead simple version of
what i was trying to do and went for a more complex version. This works
(better, anyways). However, i notice that despite the instructions to render
the textarea with 1 row, it is rendering it with about 10 rows. Anybody have
any clues as to why?


R-E-P-L

  
  
Parse term
Evaluate term
Type term
  
  
  lambda x.x>
  
  Go
  
  



Best wishes,

--greg

-- 
L.G. Meredith
Managing Partner
Biosimilarity LLC
1219 NW 83rd St
Seattle, WA 98117

+1 206.650.3740

http://biosimilarity.blogspot.com

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Charles F. Munat]

Thanks, Axel. Will take this under consideration.

Chas.

Axel Rose wrote:
> Hello Charles,
> 
> I know I'm a bit late for your request to consolidate the lift wiki.
> 
> Anyway:
> It's really puzzling to me to get the version numbers right, when creating a 
> new
> archetype with maven.
> 
> The Maven mini guide at http://wiki.liftweb.net/index.php/Maven_Mini_Guide
> is not so helpful.
> 
> Perhaps it would be good to color the version numbers and clearly state what
> will be downloaded from maven and what to do if I wanted to use snapshots.
> Does pom.xml need to be changed?
> 
> A howto for Google App Engine usage is missing. Here I'd need to use 
> snapshots.
> 
> 
> Also:
> Make it easier for guests to put suggestions into the wiki. I'm too
> lazy to register.
> 
> 
> Regards,
> Axel.
> 
> > 

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[Lift] Re: Logging Exception

[Timothy Perrett]

Have you configured your dependencies? Perhaps this will help:

http://scala-tools.org/mvnsites-snapshots/liftweb/lift-util/scaladocs/net/liftweb/util/Slf4jLogBoot$object.html

Cheers, Tim

On May 3, 3:35 am, "sailormoo...@gmail.com" 
wrote:
> Hello:
>
> I got an exception
>
> 2009-05-03 10:31:23.203::WARN:  failed LiftFilter
> java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
>         at net.liftweb.util.Slf4jLogBoot$.net$liftweb$util$Slf4jLogBoot
> $$_logger
> ByName(Slf4jLog.scala:59)
>
> while I added
>
> class Boot {
>   def boot {
>     Slf4jLogBoot.enable()
>   }
>
> }
>
> from the Lift Book, did I miss any dependency?
> Thanks
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[Lift] Article about URL rewriting in Lift

[Timothy Perrett]

Guys,

Thought people might find this an interesting article about lift's URL
rewriting system and help out some newbies :-)

http://is.gd/wq4K

Cheers, Tim
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[Lift] Re: Do you guys ever use in your templates?

[Timothy Perrett]

So your trying to asscertain if people use  directly in there
template code?

On May 3, 9:35 pm, "marius d."  wrote:
> Well SHtml.a yields a  and processed in its own snippet now. I
> guess I'm only challenging the need for  ... and try to
> understand in what context people really use it.

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[Lift] Re: Do you guys ever use in your templates?

[marius d.]

Well SHtml.a yields a  and processed in its own snippet now. I
guess I'm only challenging the need for  ... and try to
understand in what context people really use it.

Br's,
Marius

On May 3, 11:12 pm, Timothy Perrett  wrote:
> Marius,
>
> To clarify, your saying that you'd like to get rid of lift:a and move
> the functionality into SHtml or something?
>
> Thanks, Tim
>
> On May 3, 11:51 am, Marius  wrote:
>
> > Hi,
>
> > I'm asking this because SHtml.a is a bit a-typical in the sense of
> > producing  that will render the ajax link eventually.
>
> > I don't quite see the point of  since it needs a key
> > impersonating the user's function name which is unknown in the
> > template ... well unless you are using attribute snippets.
>
> > Br's,
> > Marius
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[Lift] Re: objet vs class for snippets

[Timothy Perrett]

Thanking you kindly sir - thats usefull information. Could you hazard
a guess on the performance increase of snippet registration over
convention lookup? If its much faster then perhaps we should make more
of this within our examples?

Im wondering about writing some guidelines for use of snippet object
registration vs loopup snippets vs statefull snippets - what would you
suggest?

Thanks, Tim

On May 3, 2:07 pm, David Pollak  wrote:
> Tim,
> Dispatching snippets by registering with LiftRules is much faster than the
> "by convention" mechanism of looking up the class name.  It's also type-safe
> (an issue that Greg Meredith ran into last week.)  So, it's a few more lines
> of code, but better.  Unless you've got a Stateful Snippet, you shouldn't be
> keeping any state information in the snippet instance and thus object is
> better than class.
>
> Thanks,
>
> David

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[Lift] Re: Do you guys ever use in your templates?

[Timothy Perrett]

Marius,

To clarify, your saying that you'd like to get rid of lift:a and move
the functionality into SHtml or something?

Thanks, Tim

On May 3, 11:51 am, Marius  wrote:
> Hi,
>
> I'm asking this because SHtml.a is a bit a-typical in the sense of
> producing  that will render the ajax link eventually.
>
> I don't quite see the point of  since it needs a key
> impersonating the user's function name which is unknown in the
> template ... well unless you are using attribute snippets.
>
> Br's,
> Marius
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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Timothy Perrett]

Richard, its a shame you feel like that. Your comments about examples are
noted, however you must bear in mind that both scala and lift are young
(relatively speaking) and a lot of the applications that are out there, are
behind corporate firewalls (including mine) - so don't be fooled into
thinking lift is not production ready or feeling that its not usable, were
just a little lacking right now in the documentation, but 100% *not* lacking
in the implementation (lift rocks out)

Stuff like ecommerce will grow up around lift as more people adopt it - the
same was true for rails... When I started using rails there were naff all
examples out there, so we just had to get on and make some - years later and
the story is very different. The same will no doubt happen for Lift... Its
just a waiting game - its people like your good self who can help with this:
invest a bit of time and write some examples for the benefit and learning of
all.

Let me just say this, as its probably the best advice I can give: If you do
decide to go with lift, you will not regret it. The rest of the lift team
are some of the best developers and architects I have ever had the fortune
to work with - and they all give up large amounts of their time to
participate and help the community... To that end the lift community is one
of the most intelligent and welcoming out there. Over the past two years
this has pretty much been my experience and im sure others will concur.

Good luck with your project and I hope you might reconsider your viewpoint
on lift.

Cheers, Tim

On 03/05/2009 15:58, "richard.car...@me.com"  wrote:

> I'm looking at technologies for rewriting a web site with a lot of
> dynamic content, currently written entirely in Java 1.4 and JSPs.
> Scala and Lift look promising, but the lack of documentation and non
> trivial worked examples mean that despite Lift's "1.0" status, I don't
> feel I could use it in its current form.




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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Timothy Perrett]

Wow! Too lazy to register?! IMO, registration is a one-time event and is
needed to combat spam / bot activity. Rather than having a system where
people complain / suggest alterations, we prefer people to just get on and
change them... Power to the people!

On 03/05/2009 14:33, "Axel Rose"  wrote:

> Also:
> Make it easier for guests to put suggestions into the wiki. I'm too
> lazy to register.



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[Lift] Re: How to handle refresh with S.redirectTo with state?

[marius d.]

Hmmm ... the code seems to be fine (as far as I can tell from the code
snippet)

Can you perhaps declare your RequestVars outside of Cars scope?

just

object locationQuery extends RequestVar[Box[LocationQuery]](Empty)

class Cars {
  ...
}

.. personally I would avoid using open_! unless I'm really sure that
the Box is not Empty.

Br's,
Marius

On May 3, 7:08 pm, "Bryan."  wrote:
> I believe I am doing #1 now with no luck.  Let me know if this is
> correct:
>
> class Cars {
>   // ...
>   object locationQuery extends RequestVar[Box[LocationQuery]](Empty)
>
>   def search(xhtml: NodeSeq): NodeSeq = {
>     def processSearch() = {
>       // ...
>       val lq = new LocationQuery(validPickupDate.open_!,
> validDropoffDate.open_!, city, city)
>       S.redirectTo("/select", () => { locationQuery(Full(lq));
> requestReference(Full(requestRef)) })
>     }
>
>     // binds are here
>   }
>
>   def selectedLocation(xhtml: NodeSeq): NodeSeq = {
>     if (locationQuery.isDefined) {
>       val selectedCity = locationQuery.open_!.pickupLocation
>       Text(selectedCity.name + ", " + selectedCity.region)
>     } else {
>       Text("")
>     }
>   }
>
>   // ...
>
> }
>
> Thanks,
> Bryan
>
> On May 3, 11:46 am, "marius d."  wrote:
>
> > Oh.. 1 & 2 are unrelated ... just slightly different approaches.
>
> > On May 3, 6:45 pm, "marius d."  wrote:
>
> > > Well instead of open_1 use openOr so that you wont get exceptions when
> > > the Box is Empty. Also if you want when you to the redirect you could
> > > propagate those RequestsVars as well so that your browser re-send
> > > them. Now sure if this is what you'd want but should help avoiding
> > > Empty request vars. But what I'd do is:
>
> > > 1. Since you are doing redirect with state in the function passed to
> > > S.redirectTo you can set relevant values to your RequestVar's .. hence
> > > when your page is rendered your request vars have the old values
> > > potentially.
> > > 2. Use a StatefulSnippet and call redirectTo from the StatefulSnippet
> > > not S. Hence you can save state inside your snippet and when redirect
> > > happens, the same snippet instance would be used.
>
> > > Br's,
> > > Marius
>
> > > On May 3, 6:08 pm, Bryan  wrote:
>
> > > > I have a snippet that calls S.redirectTo with state.  In this same
> > > > snippet class I have a few functions to show the values of the
> > > > processed RequestVar's.  This works fine until I refresh the page,
> > > > because in these functions I call .open_! on some now Empty
> > > > RequestVar's.  It is simple enough to show Text("") when the box is
> > > > not Full, but now I have a problem with the page not showing useful
> > > > data.
>
> > > > What are some suggestions for handling this?  Should I just add code
> > > > to each of my many snippet functions to redirect to "/" when the
> > > > RequestVar's are empty?
>
> > > > Thanks,
> > > > Bryan
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[Lift] Re: How to handle refresh with S.redirectTo with state?

[Bryan.]

I believe I am doing #1 now with no luck.  Let me know if this is
correct:

class Cars {
  // ...
  object locationQuery extends RequestVar[Box[LocationQuery]](Empty)

  def search(xhtml: NodeSeq): NodeSeq = {
def processSearch() = {
  // ...
  val lq = new LocationQuery(validPickupDate.open_!,
validDropoffDate.open_!, city, city)
  S.redirectTo("/select", () => { locationQuery(Full(lq));
requestReference(Full(requestRef)) })
}

// binds are here
  }

  def selectedLocation(xhtml: NodeSeq): NodeSeq = {
if (locationQuery.isDefined) {
  val selectedCity = locationQuery.open_!.pickupLocation
  Text(selectedCity.name + ", " + selectedCity.region)
} else {
  Text("")
}
  }

  // ...
}

Thanks,
Bryan

On May 3, 11:46 am, "marius d."  wrote:
> Oh.. 1 & 2 are unrelated ... just slightly different approaches.
>
> On May 3, 6:45 pm, "marius d."  wrote:
>
> > Well instead of open_1 use openOr so that you wont get exceptions when
> > the Box is Empty. Also if you want when you to the redirect you could
> > propagate those RequestsVars as well so that your browser re-send
> > them. Now sure if this is what you'd want but should help avoiding
> > Empty request vars. But what I'd do is:
>
> > 1. Since you are doing redirect with state in the function passed to
> > S.redirectTo you can set relevant values to your RequestVar's .. hence
> > when your page is rendered your request vars have the old values
> > potentially.
> > 2. Use a StatefulSnippet and call redirectTo from the StatefulSnippet
> > not S. Hence you can save state inside your snippet and when redirect
> > happens, the same snippet instance would be used.
>
> > Br's,
> > Marius
>
> > On May 3, 6:08 pm, Bryan  wrote:
>
> > > I have a snippet that calls S.redirectTo with state.  In this same
> > > snippet class I have a few functions to show the values of the
> > > processed RequestVar's.  This works fine until I refresh the page,
> > > because in these functions I call .open_! on some now Empty
> > > RequestVar's.  It is simple enough to show Text("") when the box is
> > > not Full, but now I have a problem with the page not showing useful
> > > data.
>
> > > What are some suggestions for handling this?  Should I just add code
> > > to each of my many snippet functions to redirect to "/" when the
> > > RequestVar's are empty?
>
> > > Thanks,
> > > Bryan

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[Lift] Re: How to handle refresh with S.redirectTo with state?

[marius d.]

Oh.. 1 & 2 are unrelated ... just slightly different approaches.

On May 3, 6:45 pm, "marius d."  wrote:
> Well instead of open_1 use openOr so that you wont get exceptions when
> the Box is Empty. Also if you want when you to the redirect you could
> propagate those RequestsVars as well so that your browser re-send
> them. Now sure if this is what you'd want but should help avoiding
> Empty request vars. But what I'd do is:
>
> 1. Since you are doing redirect with state in the function passed to
> S.redirectTo you can set relevant values to your RequestVar's .. hence
> when your page is rendered your request vars have the old values
> potentially.
> 2. Use a StatefulSnippet and call redirectTo from the StatefulSnippet
> not S. Hence you can save state inside your snippet and when redirect
> happens, the same snippet instance would be used.
>
> Br's,
> Marius
>
> On May 3, 6:08 pm, Bryan  wrote:
>
> > I have a snippet that calls S.redirectTo with state.  In this same
> > snippet class I have a few functions to show the values of the
> > processed RequestVar's.  This works fine until I refresh the page,
> > because in these functions I call .open_! on some now Empty
> > RequestVar's.  It is simple enough to show Text("") when the box is
> > not Full, but now I have a problem with the page not showing useful
> > data.
>
> > What are some suggestions for handling this?  Should I just add code
> > to each of my many snippet functions to redirect to "/" when the
> > RequestVar's are empty?
>
> > Thanks,
> > Bryan
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[Lift] Re: How to handle refresh with S.redirectTo with state?

[marius d.]

Well instead of open_1 use openOr so that you wont get exceptions when
the Box is Empty. Also if you want when you to the redirect you could
propagate those RequestsVars as well so that your browser re-send
them. Now sure if this is what you'd want but should help avoiding
Empty request vars. But what I'd do is:

1. Since you are doing redirect with state in the function passed to
S.redirectTo you can set relevant values to your RequestVar's .. hence
when your page is rendered your request vars have the old values
potentially.
2. Use a StatefulSnippet and call redirectTo from the StatefulSnippet
not S. Hence you can save state inside your snippet and when redirect
happens, the same snippet instance would be used.


Br's,
Marius

On May 3, 6:08 pm, Bryan  wrote:
> I have a snippet that calls S.redirectTo with state.  In this same
> snippet class I have a few functions to show the values of the
> processed RequestVar's.  This works fine until I refresh the page,
> because in these functions I call .open_! on some now Empty
> RequestVar's.  It is simple enough to show Text("") when the box is
> not Full, but now I have a problem with the page not showing useful
> data.
>
> What are some suggestions for handling this?  Should I just add code
> to each of my many snippet functions to redirect to "/" when the
> RequestVar's are empty?
>
> Thanks,
> Bryan
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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Bryan.]

I'd like to help with the wiki as well.  Let me know if there is
anything in particular that you would like me to do.

--Bryan

On May 3, 9:46 am, David Pollak  wrote:
> On Sun, May 3, 2009 at 6:33 AM, Axel Rose wrote:
>
>
>
>
>
> > Hello Charles,
>
> > I know I'm a bit late for your request to consolidate the lift wiki.
>
> > Anyway:
> > It's really puzzling to me to get the version numbers right, when creating
> > a new
> > archetype with maven.
>
> > The Maven mini guide athttp://wiki.liftweb.net/index.php/Maven_Mini_Guide
> > is not so helpful.
>
> > Perhaps it would be good to color the version numbers and clearly state
> > what
> > will be downloaded from maven and what to do if I wanted to use snapshots.
> > Does pom.xml need to be changed?
>
> > A howto for Google App Engine usage is missing. Here I'd need to use
> > snapshots.
>
> > Also:
> > Make it easier for guests to put suggestions into the wiki. I'm too
> > lazy to register.
>
> We've done just the opposite.  You can only get an account if you make a
> request (Derek and I create the accounts).  We've had far too much
> wiki vandalism and are clamping down by making sure everybody who has
> write-access to the wiki is willing to ask for an account.
>
>
>
> > Regards,
> > Axel.
>
> --
> Lift, the simply functional web frameworkhttp://liftweb.net
> Beginning Scalahttp://www.apress.com/book/view/1430219890
> Follow me:http://twitter.com/dpp
> Git some:http://github.com/dpp

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[Lift] How to handle refresh with S.redirectTo with state?

[Bryan]

I have a snippet that calls S.redirectTo with state.  In this same
snippet class I have a few functions to show the values of the
processed RequestVar's.  This works fine until I refresh the page,
because in these functions I call .open_! on some now Empty
RequestVar's.  It is simple enough to show Text("") when the box is
not Full, but now I have a problem with the page not showing useful
data.

What are some suggestions for handling this?  Should I just add code
to each of my many snippet functions to redirect to "/" when the
RequestVar's are empty?

Thanks,
Bryan

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[richard.car...@me.com]

My personal view is that a worked example of a fully featured
eCommerce type site would be most useful. Even something as simple as
a cut down Amazon style store with inventory management would be a
great start. That would be a useful foundation for the rest of Lift's
features (add-ons such as online chat style help).

I'm looking at technologies for rewriting a web site with a lot of
dynamic content, currently written entirely in Java 1.4 and JSPs.
Scala and Lift look promising, but the lack of documentation and non
trivial worked examples mean that despite Lift's "1.0" status, I don't
feel I could use it in its current form.

Hope this is of some help,

Regards

Richard

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[Daniel Guryca]

Hey ..  I'm not saying that you anwered my questione slowly ! I'm very
impressed that you are dealing with mailing list even on your free time on
weekend !

I just wanted to clear up why I'm in hurry.

regards
Daniel

On Sun, May 3, 2009 at 3:34 PM, David Pollak
wrote:

>
>
> On Sun, May 3, 2009 at 6:17 AM, Daniel Guryca  wrote:
>
>> Anybody ?
>>
>
> New user posts to this list are moderated (it cuts down on spam).  There
> are three of use who moderate the list, but a posting on Saturday night may
> not get moderated for 12 hours.
>
> Also, while we do intend to be responsive to user requests, expect that
> turn-around for answers, especially to non-trivial questions, may not be in
> 2 or 3 hours.  In this case, a 9 hour delay in answering on a weekend
> strikes me as fast not slow.
>
> Thanks,
>
> David
>
>
>>
>> I have spent more then month testing various frameworks.
>> Just found lift and spent the whole Friday by learning scala. I liked it.
>>
>> Time is not my friend ... I just have to choose the right language +
>> framework combo for my 3 other colleges and our coming project.
>>
>> Any comment is welcome.
>>
>> Thank you
>> Daniel
>>
>>
>> On Sat, May 2, 2009 at 10:32 PM, Dunsun  wrote:
>>
>>> Hi,
>>>
>>> I'm very new to lift and scala.
>>>
>>> I have made some Grails intranet applications but sadly Grails or
>>> better say GSP rendering part which is completely written in Groovy is
>>> a very slow beast (even in comparison with Rails or Django).
>>>
>>> For my future big project (heavy loaded site) I need something much
>>> faster.
>>>
>>> So I have made some quick and dirty Lift benchmarks using ApacheBench
>>> + Tomcat, GlassFish (from netbeans) and even Jetty.
>>> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>>>
>>> LIFT BASIC SAMPLE:
>>> ab -c 10 -n 3000
>>> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
>>> 50 req/s
>>>
>>> LIFT BLANK SAMPLE:
>>> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
>>> 120 req/s
>>>
>>> Obtained numbers were similar for all 3 servers.
>>>
>>> Using Stripes and rendering similar simple pages I'm getting much much
>>> higher scores (600 req/s).
>>> Using Grails I'm getting little worse results but I would say it is
>>> same league.
>>> I would expect much better performance from Lift which is written in
>>> scala.
>>>
>>> Why am I getting these low numbers ?
>>> Am I doing something wrong ?
>>> Any suggestion is very welcome.
>>>
>>> regards
>>> Daniel
>>
>>
>>
>>
>>
>
>
> --
> Lift, the simply functional web framework http://liftweb.net
> Beginning Scala http://www.apress.com/book/view/1430219890
> Follow me: http://twitter.com/dpp
> Git some: http://github.com/dpp
>
> >
>

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[David Pollak]

On Sun, May 3, 2009 at 6:33 AM, Axel Rose wrote:

>
> Hello Charles,
>
> I know I'm a bit late for your request to consolidate the lift wiki.
>
> Anyway:
> It's really puzzling to me to get the version numbers right, when creating
> a new
> archetype with maven.
>
> The Maven mini guide at http://wiki.liftweb.net/index.php/Maven_Mini_Guide
> is not so helpful.
>
> Perhaps it would be good to color the version numbers and clearly state
> what
> will be downloaded from maven and what to do if I wanted to use snapshots.
> Does pom.xml need to be changed?
>
> A howto for Google App Engine usage is missing. Here I'd need to use
> snapshots.
>
>
> Also:
> Make it easier for guests to put suggestions into the wiki. I'm too
> lazy to register.


We've done just the opposite.  You can only get an account if you make a
request (Derek and I create the accounts).  We've had far too much
wiki vandalism and are clamping down by making sure everybody who has
write-access to the wiki is willing to ask for an account.



>
>
>
> Regards,
> Axel.
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: Lift documentation -- Attention newcomers (and everyone else)!

[Axel Rose]

Hello Charles,

I know I'm a bit late for your request to consolidate the lift wiki.

Anyway:
It's really puzzling to me to get the version numbers right, when creating a new
archetype with maven.

The Maven mini guide at http://wiki.liftweb.net/index.php/Maven_Mini_Guide
is not so helpful.

Perhaps it would be good to color the version numbers and clearly state what
will be downloaded from maven and what to do if I wanted to use snapshots.
Does pom.xml need to be changed?

A howto for Google App Engine usage is missing. Here I'd need to use snapshots.


Also:
Make it easier for guests to put suggestions into the wiki. I'm too
lazy to register.


Regards,
Axel.

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[Bryan.]

Hi Daniel,

You can pass the following to mvn:  -Drun.mode=production.

--Bryan

On May 3, 9:18 am, Daniel Guryca  wrote:
> Hi David,
>
> Thank you for your reply.
>
> How and where can I set production vs development mode in lift ?
>
> Thank you again.
> Daniel
>
> On Sun, May 3, 2009 at 3:12 PM, David Pollak
> wrote:
>
> > Are you running Lift in production or development mode?
> > I typically see 300 pages/second to 800 pages/second when I do benchmarks
> > on dual core opteron machines.
>
> > I'll look into this, but you should be seeing north of 300 pages per second
> > with simple pages in Lift.
>
> > On Sat, May 2, 2009 at 1:32 PM, Dunsun  wrote:
>
> >> Hi,
>
> >> I'm very new to lift and scala.
>
> >> I have made some Grails intranet applications but sadly Grails or
> >> better say GSP rendering part which is completely written in Groovy is
> >> a very slow beast (even in comparison with Rails or Django).
>
> >> For my future big project (heavy loaded site) I need something much
> >> faster.
>
> >> So I have made some quick and dirty Lift benchmarks using ApacheBench
> >> + Tomcat, GlassFish (from netbeans) and even Jetty.
> >> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>
> >> LIFT BASIC SAMPLE:
> >> ab -c 10 -n 3000
> >>http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
> >> 50 req/s
>
> >> LIFT BLANK SAMPLE:
> >> ab -c 10 -n 3000http://localhost:8080/liftblank-1.0/
> >> 120 req/s
>
> >> Obtained numbers were similar for all 3 servers.
>
> >> Using Stripes and rendering similar simple pages I'm getting much much
> >> higher scores (600 req/s).
> >> Using Grails I'm getting little worse results but I would say it is
> >> same league.
> >> I would expect much better performance from Lift which is written in
> >> scala.
>
> >> Why am I getting these low numbers ?
> >> Am I doing something wrong ?
> >> Any suggestion is very welcome.
>
> >> regards
> >> Daniel
>
> > --
> > Lift, the simply functional web frameworkhttp://liftweb.net
> > Beginning Scalahttp://www.apress.com/book/view/1430219890
> > Follow me:http://twitter.com/dpp
> > Git some:http://github.com/dpp

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[David Pollak]

On Sun, May 3, 2009 at 6:17 AM, Daniel Guryca  wrote:

> Anybody ?
>

New user posts to this list are moderated (it cuts down on spam).  There are
three of use who moderate the list, but a posting on Saturday night may not
get moderated for 12 hours.

Also, while we do intend to be responsive to user requests, expect that
turn-around for answers, especially to non-trivial questions, may not be in
2 or 3 hours.  In this case, a 9 hour delay in answering on a weekend
strikes me as fast not slow.

Thanks,

David


>
> I have spent more then month testing various frameworks.
> Just found lift and spent the whole Friday by learning scala. I liked it.
>
> Time is not my friend ... I just have to choose the right language +
> framework combo for my 3 other colleges and our coming project.
>
> Any comment is welcome.
>
> Thank you
> Daniel
>
>
> On Sat, May 2, 2009 at 10:32 PM, Dunsun  wrote:
>
>> Hi,
>>
>> I'm very new to lift and scala.
>>
>> I have made some Grails intranet applications but sadly Grails or
>> better say GSP rendering part which is completely written in Groovy is
>> a very slow beast (even in comparison with Rails or Django).
>>
>> For my future big project (heavy loaded site) I need something much
>> faster.
>>
>> So I have made some quick and dirty Lift benchmarks using ApacheBench
>> + Tomcat, GlassFish (from netbeans) and even Jetty.
>> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>>
>> LIFT BASIC SAMPLE:
>> ab -c 10 -n 3000
>> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
>> 50 req/s
>>
>> LIFT BLANK SAMPLE:
>> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
>> 120 req/s
>>
>> Obtained numbers were similar for all 3 servers.
>>
>> Using Stripes and rendering similar simple pages I'm getting much much
>> higher scores (600 req/s).
>> Using Grails I'm getting little worse results but I would say it is
>> same league.
>> I would expect much better performance from Lift which is written in
>> scala.
>>
>> Why am I getting these low numbers ?
>> Am I doing something wrong ?
>> Any suggestion is very welcome.
>>
>> regards
>> Daniel
>
>
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[David Pollak]

On Sun, May 3, 2009 at 6:18 AM, Daniel Guryca  wrote:

> Hi David,
>
> Thank you for your reply.
>
> How and where can I set production vs development mode in lift ?


Set the "run.mode" system property to "production"  I do that with
-Drun.mode=production when I start Jetty, but you may do it differently.

Also, In the basic app, there's an RDBMS request for the User object on each
page load and if you've got Derby configured, that's going to slow things
down.



>
> Thank you again.
> Daniel
>
> On Sun, May 3, 2009 at 3:12 PM, David Pollak <
> feeder.of.the.be...@gmail.com> wrote:
>
>> Are you running Lift in production or development mode?
>> I typically see 300 pages/second to 800 pages/second when I do benchmarks
>> on dual core opteron machines.
>>
>> I'll look into this, but you should be seeing north of 300 pages per
>> second with simple pages in Lift.
>>
>>
>> On Sat, May 2, 2009 at 1:32 PM, Dunsun  wrote:
>>
>>>
>>> Hi,
>>>
>>> I'm very new to lift and scala.
>>>
>>> I have made some Grails intranet applications but sadly Grails or
>>> better say GSP rendering part which is completely written in Groovy is
>>> a very slow beast (even in comparison with Rails or Django).
>>>
>>> For my future big project (heavy loaded site) I need something much
>>> faster.
>>>
>>> So I have made some quick and dirty Lift benchmarks using ApacheBench
>>> + Tomcat, GlassFish (from netbeans) and even Jetty.
>>> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>>>
>>> LIFT BASIC SAMPLE:
>>> ab -c 10 -n 3000
>>> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
>>> 50 req/s
>>>
>>> LIFT BLANK SAMPLE:
>>> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
>>> 120 req/s
>>>
>>> Obtained numbers were similar for all 3 servers.
>>>
>>> Using Stripes and rendering similar simple pages I'm getting much much
>>> higher scores (600 req/s).
>>> Using Grails I'm getting little worse results but I would say it is
>>> same league.
>>> I would expect much better performance from Lift which is written in
>>> scala.
>>>
>>> Why am I getting these low numbers ?
>>> Am I doing something wrong ?
>>> Any suggestion is very welcome.
>>>
>>> regards
>>> Daniel
>>>
>>>
>>>
>>
>>
>> --
>> Lift, the simply functional web framework http://liftweb.net
>> Beginning Scala http://www.apress.com/book/view/1430219890
>> Follow me: http://twitter.com/dpp
>> Git some: http://github.com/dpp
>>
>>
>>
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: how to add object into session scope in lift

[David Pollak]

On Sat, May 2, 2009 at 12:35 PM, Andrew Scherpbier wrote:

>
> David Pollak wrote:
> >
> >
> > On Thu, Apr 30, 2009 at 10:48 PM, Andrew Scherpbier
> > mailto:and...@scherpbier.org>> wrote:
> >
> >
> > The "Getting Started" document got me hooked on Lift.  :-)
> > I guess I'll report my struggles from there.  I don't know if what
> > I did
> > is typical.
> >
> > After actually running the two examples from the "Getting Started"
> > docs,
> > I looked and found some other examples, did some looking around in
> the
> > mailing list archives and started reading the "Exploring Lift" book.
> > As a starting application of lift, I want to write a simple purchase
> > order tracking webapp.  It was easy enough to figure out how to
> > hook up
> > PostgreSQL instead of Derby.  I started experimenting with the
> CRUDify
> > trait and got several tables working, but then I got stuck trying to
> > make a more cohesive app.  What I could not figure out was how to use
> > CRUDify's functionality without having to put all the options in the
> > SiteMap.  So I spent a lot of time trying to figure out the SiteMap
> > class.  I have since come to the realization that I probably
> shouldn't
> > be using CRUDify, as non of the examples actually use it.  I have
> also
> > realized that I should be putting rules in LiftRules.rewrite.
> >
> >
> > I don't think so.  I think that you should be using SiteMap.  SiteMap
> > is the best tool for defining site navigation and access control rules
> > around.
> >
> > CRUDify and ProtoUser are like scaffolding... they get you some pieces
> > really quickly, but you'll ultimately need to replace them.  You
> > should never have to replace SiteMap.
> >
> > So... what's the specific challenge you're running into with SiteMap?
> >
> The first challenge I had was trying to figure out how to keep the
> functionality of CRUDify, but not the menu items.  The docs state that
> you can override defs.  ie:
>
> *createMenuLoc* |def createMenuLoc|
> The menu item for listing items (make this "Empty" to disable)
>Box [Menu ]
>
>
> But I don't want to disable it, just hide it from the menu.
> Then, failing that, I wanted to put the menu items in a sub-menu in the
> SiteMap.  I wasn't able to accomplish this while keeping the CRUDify
> functionality functioning.  (The submenu seems to always to add a level
> to URI but the CRUDify trait doesn't know about that?  I could be
> grossly wrong, of course!)


Super-menus and sub-menus share no URL information with each other.  A
super-menu could be at /foo/bar/baz/super and sub-menus could be at /dog and
/cat


>
> Ultimately, in the app I'm trying to build, CRUDify would only be useful
> for the main record type.  Most other records have a 1-n relationship
> with the main record.  It is unclear to me how to use CRUDify in this
> situation.  (I can use CRUDify to add a PO, but how do I use CRUDify to
> add SKUs to a specific PO?)


CRUDify is for building simple CRUD apps.  It's not meant for complex
relationships.  Until someone comes up with something better, you'll have to
hand-code the relationships and the screens for the relationships.

>
>
> So, looking at the pocketchange app which has this kind of record
> relationship as well, I figured that CRUDify was not the right
> solution.  (I hope I'm wrong, because I like what CRUDify provides!)


Sorry.

David


>
> >
> >
> > So, my point, I guess, is that it was never clear to me what request
> > rewriting was all about.  I didn't understand the explanations and
> > basically just skipped it and tried to do everything with SiteMap.
> > What I have taken away from this:  "Request Rewriting" sounds very
> > advanced and made me think of sendmail rewriting rules!  (Yuck!)
> > Maybe it would be good to have some blurbs on "Lift for JEE
> > developers".  What is the equivalent of mapping a URL to a servlet
> and
> > how do you deal with the URL pattern matching.  (I want to map
> > "/foo/*"
> > to a some soft of action)
> >
> > So that would then be a nice lead-in to coverage of
> > net.liftweb.http.S,
> > right?
> >
> > Anyway, back to API docs, it never occurred to be to look at the docs
> > for net.liftweb.http.LiftRules!  There are actually lots of comments
> > there.  The "rewrite" is kinda hidden there, so it probably should be
> > called out in the class docs.  Then for the actual "rewrite" docs, it
> > would be nice to give some examples of what should go in there or
> > provide a link to external docs showing the same.
> >
> > How have other people tackled the learning curve of lift?
> >
> > --Andrew
> >
> > Derek Chen-Becker wrote:
> > > In terms of the API docs part of it would just be expanding on the
> > > current scaladoc to provider better explanation. Obviously there
> > are a
> > > ton of classes to doc

[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[Daniel Guryca]

Hi David,

Thank you for your reply.

How and where can I set production vs development mode in lift ?

Thank you again.
Daniel

On Sun, May 3, 2009 at 3:12 PM, David Pollak
wrote:

> Are you running Lift in production or development mode?
> I typically see 300 pages/second to 800 pages/second when I do benchmarks
> on dual core opteron machines.
>
> I'll look into this, but you should be seeing north of 300 pages per second
> with simple pages in Lift.
>
>
> On Sat, May 2, 2009 at 1:32 PM, Dunsun  wrote:
>
>>
>> Hi,
>>
>> I'm very new to lift and scala.
>>
>> I have made some Grails intranet applications but sadly Grails or
>> better say GSP rendering part which is completely written in Groovy is
>> a very slow beast (even in comparison with Rails or Django).
>>
>> For my future big project (heavy loaded site) I need something much
>> faster.
>>
>> So I have made some quick and dirty Lift benchmarks using ApacheBench
>> + Tomcat, GlassFish (from netbeans) and even Jetty.
>> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>>
>> LIFT BASIC SAMPLE:
>> ab -c 10 -n 3000
>> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
>> 50 req/s
>>
>> LIFT BLANK SAMPLE:
>> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
>> 120 req/s
>>
>> Obtained numbers were similar for all 3 servers.
>>
>> Using Stripes and rendering similar simple pages I'm getting much much
>> higher scores (600 req/s).
>> Using Grails I'm getting little worse results but I would say it is
>> same league.
>> I would expect much better performance from Lift which is written in
>> scala.
>>
>> Why am I getting these low numbers ?
>> Am I doing something wrong ?
>> Any suggestion is very welcome.
>>
>> regards
>> Daniel
>>
>>
>>
>
>
> --
> Lift, the simply functional web framework http://liftweb.net
> Beginning Scala http://www.apress.com/book/view/1430219890
> Follow me: http://twitter.com/dpp
> Git some: http://github.com/dpp
>
> >
>

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[Daniel Guryca]

Anybody ?

I have spent more then month testing various frameworks.
Just found lift and spent the whole Friday by learning scala. I liked it.

Time is not my friend ... I just have to choose the right language +
framework combo for my 3 other colleges and our coming project.

Any comment is welcome.

Thank you
Daniel

On Sat, May 2, 2009 at 10:32 PM, Dunsun  wrote:

> Hi,
>
> I'm very new to lift and scala.
>
> I have made some Grails intranet applications but sadly Grails or
> better say GSP rendering part which is completely written in Groovy is
> a very slow beast (even in comparison with Rails or Django).
>
> For my future big project (heavy loaded site) I need something much
> faster.
>
> So I have made some quick and dirty Lift benchmarks using ApacheBench
> + Tomcat, GlassFish (from netbeans) and even Jetty.
> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>
> LIFT BASIC SAMPLE:
> ab -c 10 -n 3000
> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
> 50 req/s
>
> LIFT BLANK SAMPLE:
> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
> 120 req/s
>
> Obtained numbers were similar for all 3 servers.
>
> Using Stripes and rendering similar simple pages I'm getting much much
> higher scores (600 req/s).
> Using Grails I'm getting little worse results but I would say it is
> same league.
> I would expect much better performance from Lift which is written in
> scala.
>
> Why am I getting these low numbers ?
> Am I doing something wrong ?
> Any suggestion is very welcome.
>
> regards
> Daniel

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[Lift] Re: User model

[David Pollak]

On Sun, May 3, 2009 at 3:48 AM, ishaaq  wrote:

>
> Hi all,
> I've just started playing with Lift so forgive me if this question
> seems a bit naive - that would be because I am a newbie :)
>
> I am trying to build a webapp with user authentication. However, I
> don't want to use ProtoUser because I want to key it by the userid -
> which is a unique String not a Long.
>
> Since the doco is a bit sparse I am at a bit of a loss at how to get
> user authentication done without using ProtoUser. Any pointers would
> be appreciated.
>

There's no such thing as user authentication built into Lift.  Lift has no
concept of a User.  All code for authentication is built on top of simple
Lift constructs.

Lift has a concept called a SessionVar which allows you to put a type-safe
value into a place that's session-specific.  In MegaProtoUser:

  private object curUserId extends SessionVar[Box[String]](Empty)

  def currentUserId: Box[String] = curUserId.is

  private object curUser extends
RequestVar[Box[ModelType]](currentUserId.flatMap(id =>
getSingleton.find(id)))


  def currentUser: Box[ModelType] = curUser.is

So, the curUserId SessionVar stores the currently logged in User's id (as a
String).  The curUser RequestVar is the current User object, but calculated
on a request-by-request basis.

This is all you need for your own authentication mechanism.

Thanks,

David


>
> Thanks,
> Ishaaq
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: Sample applications are somewhat slow - is Lift slow ?

[David Pollak]

Are you running Lift in production or development mode?
I typically see 300 pages/second to 800 pages/second when I do benchmarks on
dual core opteron machines.

I'll look into this, but you should be seeing north of 300 pages per second
with simple pages in Lift.

On Sat, May 2, 2009 at 1:32 PM, Dunsun  wrote:

>
> Hi,
>
> I'm very new to lift and scala.
>
> I have made some Grails intranet applications but sadly Grails or
> better say GSP rendering part which is completely written in Groovy is
> a very slow beast (even in comparison with Rails or Django).
>
> For my future big project (heavy loaded site) I need something much
> faster.
>
> So I have made some quick and dirty Lift benchmarks using ApacheBench
> + Tomcat, GlassFish (from netbeans) and even Jetty.
> My machine - AMD X2 @ 2500Mhz, 4 GB RAM
>
> LIFT BASIC SAMPLE:
> ab -c 10 -n 3000
> http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
> 50 req/s
>
> LIFT BLANK SAMPLE:
> ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
> 120 req/s
>
> Obtained numbers were similar for all 3 servers.
>
> Using Stripes and rendering similar simple pages I'm getting much much
> higher scores (600 req/s).
> Using Grails I'm getting little worse results but I would say it is
> same league.
> I would expect much better performance from Lift which is written in
> scala.
>
> Why am I getting these low numbers ?
> Am I doing something wrong ?
> Any suggestion is very welcome.
>
> regards
> Daniel
>
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp

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[Lift] Re: objet vs class for snippets

[David Pollak]

Tim,
Dispatching snippets by registering with LiftRules is much faster than the
"by convention" mechanism of looking up the class name.  It's also type-safe
(an issue that Greg Meredith ran into last week.)  So, it's a few more lines
of code, but better.  Unless you've got a Stateful Snippet, you shouldn't be
keeping any state information in the snippet instance and thus object is
better than class.

Thanks,

David

On Sat, May 2, 2009 at 7:27 AM, Timothy Perrett wrote:

>
> Guys,
>
> I noticed that the internal lift snippets (msgs et al) have been moved
> to objects rather than classes - there are obvious benefits
> performance wise for this, but what should we be supplying to new-
> comers as the de-facto snippet implementation style? I know the answer
> is unlikely to be clean cut, but perhaps we should document the pros /
> cons of both approaches?
>
> Thanks, Tim
> >
>


-- 
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
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[Lift] User model

[ishaaq]

Hi all,
I've just started playing with Lift so forgive me if this question
seems a bit naive - that would be because I am a newbie :)

I am trying to build a webapp with user authentication. However, I
don't want to use ProtoUser because I want to key it by the userid -
which is a unique String not a Long.

Since the doco is a bit sparse I am at a bit of a loss at how to get
user authentication done without using ProtoUser. Any pointers would
be appreciated.

Thanks,
Ishaaq

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[Lift] Logging Exception

[sailormoo...@gmail.com]

Hello:

I got an exception

2009-05-03 10:31:23.203::WARN:  failed LiftFilter
java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at net.liftweb.util.Slf4jLogBoot$.net$liftweb$util$Slf4jLogBoot
$$_logger
ByName(Slf4jLog.scala:59)

while I added


class Boot {
  def boot {
Slf4jLogBoot.enable()
  }
}

from the Lift Book, did I miss any dependency?
Thanks


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[Lift] Sample applications are somewhat slow - is Lift slow ?

[Dunsun]

Hi,

I'm very new to lift and scala.

I have made some Grails intranet applications but sadly Grails or
better say GSP rendering part which is completely written in Groovy is
a very slow beast (even in comparison with Rails or Django).

For my future big project (heavy loaded site) I need something much
faster.

So I have made some quick and dirty Lift benchmarks using ApacheBench
+ Tomcat, GlassFish (from netbeans) and even Jetty.
My machine - AMD X2 @ 2500Mhz, 4 GB RAM

LIFT BASIC SAMPLE:
ab -c 10 -n 3000 http://localhost:8080/liftbasic-1.0-SNAPSHOT/user_mgt/login
50 req/s

LIFT BLANK SAMPLE:
ab -c 10 -n 3000 http://localhost:8080/liftblank-1.0/
120 req/s

Obtained numbers were similar for all 3 servers.

Using Stripes and rendering similar simple pages I'm getting much much
higher scores (600 req/s).
Using Grails I'm getting little worse results but I would say it is
same league.
I would expect much better performance from Lift which is written in
scala.

Why am I getting these low numbers ?
Am I doing something wrong ?
Any suggestion is very welcome.

regards
Daniel

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[Lift] Re: how to add object into session scope in lift

[Andrew Scherpbier]

David Pollak wrote:
>
>
> On Thu, Apr 30, 2009 at 10:48 PM, Andrew Scherpbier 
> mailto:and...@scherpbier.org>> wrote:
>
>
> The "Getting Started" document got me hooked on Lift.  :-)
> I guess I'll report my struggles from there.  I don't know if what
> I did
> is typical.
>
> After actually running the two examples from the "Getting Started"
> docs,
> I looked and found some other examples, did some looking around in the
> mailing list archives and started reading the "Exploring Lift" book.
> As a starting application of lift, I want to write a simple purchase
> order tracking webapp.  It was easy enough to figure out how to
> hook up
> PostgreSQL instead of Derby.  I started experimenting with the CRUDify
> trait and got several tables working, but then I got stuck trying to
> make a more cohesive app.  What I could not figure out was how to use
> CRUDify's functionality without having to put all the options in the
> SiteMap.  So I spent a lot of time trying to figure out the SiteMap
> class.  I have since come to the realization that I probably shouldn't
> be using CRUDify, as non of the examples actually use it.  I have also
> realized that I should be putting rules in LiftRules.rewrite.
>
>
> I don't think so.  I think that you should be using SiteMap.  SiteMap 
> is the best tool for defining site navigation and access control rules 
> around.
>
> CRUDify and ProtoUser are like scaffolding... they get you some pieces 
> really quickly, but you'll ultimately need to replace them.  You 
> should never have to replace SiteMap.
>
> So... what's the specific challenge you're running into with SiteMap?
>  
The first challenge I had was trying to figure out how to keep the 
functionality of CRUDify, but not the menu items.  The docs state that 
you can override defs.  ie:

*createMenuLoc* |def createMenuLoc|
The menu item for listing items (make this "Empty" to disable)
Box [Menu ]


But I don't want to disable it, just hide it from the menu.
Then, failing that, I wanted to put the menu items in a sub-menu in the 
SiteMap.  I wasn't able to accomplish this while keeping the CRUDify 
functionality functioning.  (The submenu seems to always to add a level 
to URI but the CRUDify trait doesn't know about that?  I could be 
grossly wrong, of course!)
Ultimately, in the app I'm trying to build, CRUDify would only be useful 
for the main record type.  Most other records have a 1-n relationship 
with the main record.  It is unclear to me how to use CRUDify in this 
situation.  (I can use CRUDify to add a PO, but how do I use CRUDify to 
add SKUs to a specific PO?)

So, looking at the pocketchange app which has this kind of record 
relationship as well, I figured that CRUDify was not the right 
solution.  (I hope I'm wrong, because I like what CRUDify provides!)
>
>
> So, my point, I guess, is that it was never clear to me what request
> rewriting was all about.  I didn't understand the explanations and
> basically just skipped it and tried to do everything with SiteMap.
> What I have taken away from this:  "Request Rewriting" sounds very
> advanced and made me think of sendmail rewriting rules!  (Yuck!)
> Maybe it would be good to have some blurbs on "Lift for JEE
> developers".  What is the equivalent of mapping a URL to a servlet and
> how do you deal with the URL pattern matching.  (I want to map
> "/foo/*"
> to a some soft of action)
>
> So that would then be a nice lead-in to coverage of
> net.liftweb.http.S,
> right?
>
> Anyway, back to API docs, it never occurred to be to look at the docs
> for net.liftweb.http.LiftRules!  There are actually lots of comments
> there.  The "rewrite" is kinda hidden there, so it probably should be
> called out in the class docs.  Then for the actual "rewrite" docs, it
> would be nice to give some examples of what should go in there or
> provide a link to external docs showing the same.
>
> How have other people tackled the learning curve of lift?
>
> --Andrew
>
> Derek Chen-Becker wrote:
> > In terms of the API docs part of it would just be expanding on the
> > current scaladoc to provider better explanation. Obviously there
> are a
> > ton of classes to document, so I'd like to focus efforts on getting
> > the most bang for the buck. I was thinking of starting with
> > net.liftweb.http.{LiftRules,S,SHtml} and making the documentation on
> > them *outstanding*. We can branch out from there. If you're
> coming to
> > Lift new, it would also be helpful to find out what we're missing or
> > need to cover better in the "Getting Started" document on the web
> > site. If you want to read through that and provide feedback here on
> > the list that would be great.
> >
> > Derek
> >
> > On Thu, Apr 30, 2009 at 12:20 PM, Andrew Scherpbier
>

[Lift] Do you guys ever use in your templates?

[Marius]

Hi,

I'm asking this because SHtml.a is a bit a-typical in the sense of
producing  that will render the ajax link eventually.

I don't quite see the point of  since it needs a key
impersonating the user's function name which is unknown in the
template ... well unless you are using attribute snippets.

Br's,
Marius
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[Lift] Re: stuck on some scala while using jpa

[TSP]

OK to answer own question in case anyone has similar problems:
ScalaEntityManager returns a bufferWrapper from the jcl.Conversions
not a List. However, it can be treated as a Seq[Postcode]
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[Lift] Re: Localize an image

[marius d.]

As a continuation to Tim's notes. You can have templates suffixed with
the locale suffix. So for the template applicable for one locale or
another just use different CSS files.

I guess you can also use chooseTemplate to render different variants
of the markup in question.

Br's,
Marius

On May 1, 6:52 pm, Timothy Perrett  wrote:
> Can you not just apply a CSS class dynamically to that element and write the
> appropriate CSS?
>
> Thanks, Tim
>
> On 01/05/2009 16:42, "bradford"  wrote:
>
>
>
> > lift localization is going very smoothly -- thank you all for your
> > efforts put into this.  Does anyone know if it is possible to localize
> > an image, for example have search.gif and search_fr_FR.gif?  My
> > template should be the same for all languages except for this one
> > button image:   > f:alt="Search" f:src="/img/search.gif" />.
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[Lift] Re: buttons and textbox

[marius d.]

I would simply use Shtml.ajaxText. When you press ENTER an ajax
request is sent tothe server and your function would be called with th
value you typed in.

Br's,
Marius

On May 3, 11:44 am, Meredith Gregory  wrote:
> Marius,
>
> Thanks! That works much better. One final question, if i wanted to have the
> CR/LF event on the textbox have the same behavior as the button, what would
> be the simplest approach? Currently, i have
>
> { text(evalStr(), (updateWhat _)) % ("size" -> "60") % ("id" -> "whatField")
>
> }
>
> which always reverts back to the initla value of the textbox.
>
> Best wishes,
>
> --greg
>
>
>
> On Sun, May 3, 2009 at 1:08 AM, marius d.  wrote:
>
> > First of all instead of:
>
> >  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> > updateWhat(s))._2)
>
> > I would use:
>
> >  ("onclick" -> ajaxCall(ValById("whatField"), s => updateWhat(s))._2)
>
> > That should work  I think in your case you are setting the value
> > attribute of the text field to "lambda.x.x" and "$('#whatField').attr
> > ('value') is just returning the 'value' attribute of the whatField
> > node. This returns the value set statically which is different from
> > document.getElementById("whatField").value. I know it's a bit odd ...
>
> > Br's,
> > Marius
>
> > On May 3, 10:51 am, Meredith Gregory  wrote:
> > > Marius,
>
> > > Thanks for the tip! That gets me a little further. However, what i really
> > > don't understand is why it is that after i have modified the textbox from
> > > "lambda x.x" to "lambda x.(x x)", then when i type
> > > $('#whatField').attr('value') in the javascript evaluation window in
> > firebug
> > > it's returning "lambda x.x". How do i access the contents of the textbox
> > > except by that call?
>
> > > Best wishes,
>
> > > --greg
>
> > > On Sun, May 3, 2009 at 12:11 AM, marius d. 
> > wrote:
>
> > > > Greg,
>
> > > > ajaxCall returns a tuple (String, JsExp) ... so when you use it try
> > > > something like:
>
> > > >  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> > > > updateWhat(s))._2)
>
> > > > Br's,
> > > > Marius
>
> > > > On May 3, 9:00 am, Meredith Gregory  wrote:
> > > > > Lifted,
>
> > > > > When i look at the button behavior using firebug, this is the
> > following
> > > > > error i see.
>
> > > > > F891109765602PT1 is not defined
> > > > > onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
> > > > > (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null,
> > > > null));
>
> > > > > It would appear that however the
>
> > > > > ajaxCall(JsRaw("$('#whatField').attr('value')")
>
> > > > > is working it is setting up a handle that is stale by the time the
> > > > behavior
> > > > > is actually invoked. This is behind-the-scenes stuff for a programmer
> > > > like
> > > > > me. It's part of what lift is s'posed to provide. Moreover, i get no
> > help
> > > > > from the compiler. The code i have written is well-typed. Any help
> > would
> > > > be
> > > > > greatly appreciated.
>
> > > > > Best wishes,
>
> > > > > --greg
>
> > > > > On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
> > > > > wrote:
>
> > > > > > Lifted,
>
> > > > > > i'm putting together a little lift-based testharness in which to
> > > > evaluate
> > > > > > various solutions to the challenge Martin posted recently regarding
> > > > scalable
> > > > > > abstractions for a little lambda interpreter. You can get a copy of
> > the
> > > > app
> > > > > > here .
> > (Please
> > > > note:
> > > > > > this is a testharness and not a proposed solution. i've got a
> > couple of
> > > > > > solutions in mind, but before i post them, i'd like to put them in
> > a
> > > > web
> > > > > > "container".) As usual, i'm running into problems on the frontend.
> > i'm
> > > > not
> > > > > > getting expected callback behavior, and, moreover, the code i'm
> > using
> > > > used
> > > > > > to work fine.
>
> > > > > > The snippet code is included below this email's closing. The
> > relevant
> > > > > > fragment is listed just below. The behavior i see is that the
> > button
> > > > > > produces no behavior on the server at all. The CR/LF event on the
> > text
> > > > field
> > > > > > causes updateWhat to be called twice. Any advice on the frontend
> > > > behavior
> > > > > > would be greatly appreciated.
>
> > > > > > def whatNode(termStr : String) = {
> > > > > >     theTerm = termStr
> > > > > >     theClientRequestStr = evalStr()
> > > > > >     var theParseResponseStr : String =
> > > > > >       ("failure: " + theClientRequestStr + "\n");
> > > > > >     try {
> > > > > >       theParseResponseStr =
> > > > > >     theREPL.showClientRequestParseTree(theClientRequestStr)
> > > > > >       println( "parsed : " + theParseResponseStr );
> > > > > >     //theREPL.readEvalPrint(theClientRequestStr)
> > > > > >     }
> > > > > >     catch {
> > > > > >       case e => {
> > > > > >     val sw : java.io.StringWriter

[Lift] Re: buttons and textbox

[Meredith Gregory]

Marius,

Thanks! That works much better. One final question, if i wanted to have the
CR/LF event on the textbox have the same behavior as the button, what would
be the simplest approach? Currently, i have

{ text(evalStr(), (updateWhat _)) % ("size" -> "60") % ("id" -> "whatField")
}

which always reverts back to the initla value of the textbox.

Best wishes,

--greg

On Sun, May 3, 2009 at 1:08 AM, marius d.  wrote:

>
> First of all instead of:
>
>  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> updateWhat(s))._2)
>
> I would use:
>
>  ("onclick" -> ajaxCall(ValById("whatField"), s => updateWhat(s))._2)
>
>
> That should work  I think in your case you are setting the value
> attribute of the text field to "lambda.x.x" and "$('#whatField').attr
> ('value') is just returning the 'value' attribute of the whatField
> node. This returns the value set statically which is different from
> document.getElementById("whatField").value. I know it's a bit odd ...
>
> Br's,
> Marius
>
> On May 3, 10:51 am, Meredith Gregory  wrote:
> > Marius,
> >
> > Thanks for the tip! That gets me a little further. However, what i really
> > don't understand is why it is that after i have modified the textbox from
> > "lambda x.x" to "lambda x.(x x)", then when i type
> > $('#whatField').attr('value') in the javascript evaluation window in
> firebug
> > it's returning "lambda x.x". How do i access the contents of the textbox
> > except by that call?
> >
> > Best wishes,
> >
> > --greg
> >
> >
> >
> > On Sun, May 3, 2009 at 12:11 AM, marius d. 
> wrote:
> >
> > > Greg,
> >
> > > ajaxCall returns a tuple (String, JsExp) ... so when you use it try
> > > something like:
> >
> > >  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> > > updateWhat(s))._2)
> >
> > > Br's,
> > > Marius
> >
> > > On May 3, 9:00 am, Meredith Gregory  wrote:
> > > > Lifted,
> >
> > > > When i look at the button behavior using firebug, this is the
> following
> > > > error i see.
> >
> > > > F891109765602PT1 is not defined
> > > > onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
> > > > (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null,
> > > null));
> >
> > > > It would appear that however the
> >
> > > > ajaxCall(JsRaw("$('#whatField').attr('value')")
> >
> > > > is working it is setting up a handle that is stale by the time the
> > > behavior
> > > > is actually invoked. This is behind-the-scenes stuff for a programmer
> > > like
> > > > me. It's part of what lift is s'posed to provide. Moreover, i get no
> help
> > > > from the compiler. The code i have written is well-typed. Any help
> would
> > > be
> > > > greatly appreciated.
> >
> > > > Best wishes,
> >
> > > > --greg
> >
> > > > On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
> > > > wrote:
> >
> > > > > Lifted,
> >
> > > > > i'm putting together a little lift-based testharness in which to
> > > evaluate
> > > > > various solutions to the challenge Martin posted recently regarding
> > > scalable
> > > > > abstractions for a little lambda interpreter. You can get a copy of
> the
> > > app
> > > > > here .
> (Please
> > > note:
> > > > > this is a testharness and not a proposed solution. i've got a
> couple of
> > > > > solutions in mind, but before i post them, i'd like to put them in
> a
> > > web
> > > > > "container".) As usual, i'm running into problems on the frontend.
> i'm
> > > not
> > > > > getting expected callback behavior, and, moreover, the code i'm
> using
> > > used
> > > > > to work fine.
> >
> > > > > The snippet code is included below this email's closing. The
> relevant
> > > > > fragment is listed just below. The behavior i see is that the
> button
> > > > > produces no behavior on the server at all. The CR/LF event on the
> text
> > > field
> > > > > causes updateWhat to be called twice. Any advice on the frontend
> > > behavior
> > > > > would be greatly appreciated.
> >
> > > > > def whatNode(termStr : String) = {
> > > > > theTerm = termStr
> > > > > theClientRequestStr = evalStr()
> > > > > var theParseResponseStr : String =
> > > > >   ("failure: " + theClientRequestStr + "\n");
> > > > > try {
> > > > >   theParseResponseStr =
> > > > > theREPL.showClientRequestParseTree(theClientRequestStr)
> > > > >   println( "parsed : " + theParseResponseStr );
> > > > > //theREPL.readEvalPrint(theClientRequestStr)
> > > > > }
> > > > > catch {
> > > > >   case e => {
> > > > > val sw : java.io.StringWriter =new java.io.StringWriter( );
> > > > > e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> > > > > theParseResponseStr = theParseResponseStr + e.toString
> > > > >   }
> > > > > }
> > > > > {theParseResponseStr}
> > > > >   }
> >
> > > > >   def updateWhat(str: String): JsCmd = {
> > > > > println("updateWhat with " + str)
> > > > > JsCmds.SetHtml("parseTree"

[Lift] Re: buttons and textbox

[marius d.]

Oh and one question out of curiosity with your approach even if you
see the old value in the firebug widow do you still get the od value
on the text on server side?

On May 3, 11:08 am, "marius d."  wrote:
> First of all instead of:
>
>  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> updateWhat(s))._2)
>
> I would use:
>
>  ("onclick" -> ajaxCall(ValById("whatField"), s => updateWhat(s))._2)
>
> That should work  I think in your case you are setting the value
> attribute of the text field to "lambda.x.x" and "$('#whatField').attr
> ('value') is just returning the 'value' attribute of the whatField
> node. This returns the value set statically which is different from
> document.getElementById("whatField").value. I know it's a bit odd ...
>
> Br's,
> Marius
>
> On May 3, 10:51 am, Meredith Gregory  wrote:
>
> > Marius,
>
> > Thanks for the tip! That gets me a little further. However, what i really
> > don't understand is why it is that after i have modified the textbox from
> > "lambda x.x" to "lambda x.(x x)", then when i type
> > $('#whatField').attr('value') in the javascript evaluation window in firebug
> > it's returning "lambda x.x". How do i access the contents of the textbox
> > except by that call?
>
> > Best wishes,
>
> > --greg
>
> > On Sun, May 3, 2009 at 12:11 AM, marius d.  wrote:
>
> > > Greg,
>
> > > ajaxCall returns a tuple (String, JsExp) ... so when you use it try
> > > something like:
>
> > >  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> > > updateWhat(s))._2)
>
> > > Br's,
> > > Marius
>
> > > On May 3, 9:00 am, Meredith Gregory  wrote:
> > > > Lifted,
>
> > > > When i look at the button behavior using firebug, this is the following
> > > > error i see.
>
> > > > F891109765602PT1 is not defined
> > > > onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
> > > > (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null,
> > > null));
>
> > > > It would appear that however the
>
> > > > ajaxCall(JsRaw("$('#whatField').attr('value')")
>
> > > > is working it is setting up a handle that is stale by the time the
> > > behavior
> > > > is actually invoked. This is behind-the-scenes stuff for a programmer
> > > like
> > > > me. It's part of what lift is s'posed to provide. Moreover, i get no 
> > > > help
> > > > from the compiler. The code i have written is well-typed. Any help would
> > > be
> > > > greatly appreciated.
>
> > > > Best wishes,
>
> > > > --greg
>
> > > > On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
> > > > wrote:
>
> > > > > Lifted,
>
> > > > > i'm putting together a little lift-based testharness in which to
> > > evaluate
> > > > > various solutions to the challenge Martin posted recently regarding
> > > scalable
> > > > > abstractions for a little lambda interpreter. You can get a copy of 
> > > > > the
> > > app
> > > > > here . (Please
> > > note:
> > > > > this is a testharness and not a proposed solution. i've got a couple 
> > > > > of
> > > > > solutions in mind, but before i post them, i'd like to put them in a
> > > web
> > > > > "container".) As usual, i'm running into problems on the frontend. i'm
> > > not
> > > > > getting expected callback behavior, and, moreover, the code i'm using
> > > used
> > > > > to work fine.
>
> > > > > The snippet code is included below this email's closing. The relevant
> > > > > fragment is listed just below. The behavior i see is that the button
> > > > > produces no behavior on the server at all. The CR/LF event on the text
> > > field
> > > > > causes updateWhat to be called twice. Any advice on the frontend
> > > behavior
> > > > > would be greatly appreciated.
>
> > > > > def whatNode(termStr : String) = {
> > > > >     theTerm = termStr
> > > > >     theClientRequestStr = evalStr()
> > > > >     var theParseResponseStr : String =
> > > > >       ("failure: " + theClientRequestStr + "\n");
> > > > >     try {
> > > > >       theParseResponseStr =
> > > > >     theREPL.showClientRequestParseTree(theClientRequestStr)
> > > > >       println( "parsed : " + theParseResponseStr );
> > > > >     //theREPL.readEvalPrint(theClientRequestStr)
> > > > >     }
> > > > >     catch {
> > > > >       case e => {
> > > > >     val sw : java.io.StringWriter =    new java.io.StringWriter( );
> > > > >     e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> > > > >     theParseResponseStr = theParseResponseStr + e.toString
> > > > >       }
> > > > >     }
> > > > >     {theParseResponseStr}
> > > > >   }
>
> > > > >   def updateWhat(str: String): JsCmd = {
> > > > >     println("updateWhat with " + str)
> > > > >     JsCmds.SetHtml("parseTree", whatNode(str))
> > > > >   }
>
> > > > >   def show(xhtml: NodeSeq): NodeSeq = {
> > > > >     
> > > > >       Term :
> > > > >       { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id"
> > > ->
> > > > > "whatField") }
> > > > >       { {?("Go")} %
>

[Lift] Re: buttons and textbox

[marius d.]

First of all instead of:

 ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
updateWhat(s))._2)

I would use:

 ("onclick" -> ajaxCall(ValById("whatField"), s => updateWhat(s))._2)


That should work  I think in your case you are setting the value
attribute of the text field to "lambda.x.x" and "$('#whatField').attr
('value') is just returning the 'value' attribute of the whatField
node. This returns the value set statically which is different from
document.getElementById("whatField").value. I know it's a bit odd ...

Br's,
Marius

On May 3, 10:51 am, Meredith Gregory  wrote:
> Marius,
>
> Thanks for the tip! That gets me a little further. However, what i really
> don't understand is why it is that after i have modified the textbox from
> "lambda x.x" to "lambda x.(x x)", then when i type
> $('#whatField').attr('value') in the javascript evaluation window in firebug
> it's returning "lambda x.x". How do i access the contents of the textbox
> except by that call?
>
> Best wishes,
>
> --greg
>
>
>
> On Sun, May 3, 2009 at 12:11 AM, marius d.  wrote:
>
> > Greg,
>
> > ajaxCall returns a tuple (String, JsExp) ... so when you use it try
> > something like:
>
> >  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> > updateWhat(s))._2)
>
> > Br's,
> > Marius
>
> > On May 3, 9:00 am, Meredith Gregory  wrote:
> > > Lifted,
>
> > > When i look at the button behavior using firebug, this is the following
> > > error i see.
>
> > > F891109765602PT1 is not defined
> > > onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
> > > (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null,
> > null));
>
> > > It would appear that however the
>
> > > ajaxCall(JsRaw("$('#whatField').attr('value')")
>
> > > is working it is setting up a handle that is stale by the time the
> > behavior
> > > is actually invoked. This is behind-the-scenes stuff for a programmer
> > like
> > > me. It's part of what lift is s'posed to provide. Moreover, i get no help
> > > from the compiler. The code i have written is well-typed. Any help would
> > be
> > > greatly appreciated.
>
> > > Best wishes,
>
> > > --greg
>
> > > On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
> > > wrote:
>
> > > > Lifted,
>
> > > > i'm putting together a little lift-based testharness in which to
> > evaluate
> > > > various solutions to the challenge Martin posted recently regarding
> > scalable
> > > > abstractions for a little lambda interpreter. You can get a copy of the
> > app
> > > > here . (Please
> > note:
> > > > this is a testharness and not a proposed solution. i've got a couple of
> > > > solutions in mind, but before i post them, i'd like to put them in a
> > web
> > > > "container".) As usual, i'm running into problems on the frontend. i'm
> > not
> > > > getting expected callback behavior, and, moreover, the code i'm using
> > used
> > > > to work fine.
>
> > > > The snippet code is included below this email's closing. The relevant
> > > > fragment is listed just below. The behavior i see is that the button
> > > > produces no behavior on the server at all. The CR/LF event on the text
> > field
> > > > causes updateWhat to be called twice. Any advice on the frontend
> > behavior
> > > > would be greatly appreciated.
>
> > > > def whatNode(termStr : String) = {
> > > >     theTerm = termStr
> > > >     theClientRequestStr = evalStr()
> > > >     var theParseResponseStr : String =
> > > >       ("failure: " + theClientRequestStr + "\n");
> > > >     try {
> > > >       theParseResponseStr =
> > > >     theREPL.showClientRequestParseTree(theClientRequestStr)
> > > >       println( "parsed : " + theParseResponseStr );
> > > >     //theREPL.readEvalPrint(theClientRequestStr)
> > > >     }
> > > >     catch {
> > > >       case e => {
> > > >     val sw : java.io.StringWriter =    new java.io.StringWriter( );
> > > >     e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> > > >     theParseResponseStr = theParseResponseStr + e.toString
> > > >       }
> > > >     }
> > > >     {theParseResponseStr}
> > > >   }
>
> > > >   def updateWhat(str: String): JsCmd = {
> > > >     println("updateWhat with " + str)
> > > >     JsCmds.SetHtml("parseTree", whatNode(str))
> > > >   }
>
> > > >   def show(xhtml: NodeSeq): NodeSeq = {
> > > >     
> > > >       Term :
> > > >       { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id"
> > ->
> > > > "whatField") }
> > > >       { {?("Go")} %
> > > >        ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s
> > =>
> > > > updateWhat(s))) }
> > > >       
> > > >       {whatNode(evalStr())}
> > > >     
> > > >   }
>
> > > > Best wishes,
>
> > > > --greg
>
> > > > package com.biosimilarity.reflection.snippet
>
> > > > import net.liftweb._
> > > > import http._
> > > > import S._
> > > > import SHtml._
> > > > import util._
> > > > import Helpers._
> > > > import mapper._
> > >

[Lift] Re: buttons and textbox

[Meredith Gregory]

Marius, et al,

Put another way, what is the minimal code that will allow me to associate to
the button click calling updateWhat with the string that is currently
sitting in the textbox?

Best wishes,

--greg

On Sun, May 3, 2009 at 12:51 AM, Meredith Gregory
wrote:

> Marius,
>
> Thanks for the tip! That gets me a little further. However, what i really
> don't understand is why it is that after i have modified the textbox from
> "lambda x.x" to "lambda x.(x x)", then when i type
> $('#whatField').attr('value') in the javascript evaluation window in firebug
> it's returning "lambda x.x". How do i access the contents of the textbox
> except by that call?
>
> Best wishes,
>
> --greg
>
>
> On Sun, May 3, 2009 at 12:11 AM, marius d. wrote:
>
>>
>> Greg,
>>
>> ajaxCall returns a tuple (String, JsExp) ... so when you use it try
>> something like:
>>
>>  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
>> updateWhat(s))._2)
>>
>> Br's,
>> Marius
>>
>> On May 3, 9:00 am, Meredith Gregory  wrote:
>> > Lifted,
>> >
>> > When i look at the button behavior using firebug, this is the following
>> > error i see.
>> >
>> > F891109765602PT1 is not defined
>> > onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
>> > (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null,
>> null));
>> >
>> > It would appear that however the
>> >
>> > ajaxCall(JsRaw("$('#whatField').attr('value')")
>> >
>> > is working it is setting up a handle that is stale by the time the
>> behavior
>> > is actually invoked. This is behind-the-scenes stuff for a programmer
>> like
>> > me. It's part of what lift is s'posed to provide. Moreover, i get no
>> help
>> > from the compiler. The code i have written is well-typed. Any help would
>> be
>> > greatly appreciated.
>> >
>> > Best wishes,
>> >
>> > --greg
>> >
>> > On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
>> > wrote:
>> >
>> >
>> >
>> > > Lifted,
>> >
>> > > i'm putting together a little lift-based testharness in which to
>> evaluate
>> > > various solutions to the challenge Martin posted recently regarding
>> scalable
>> > > abstractions for a little lambda interpreter. You can get a copy of
>> the app
>> > > here . (Please
>> note:
>> > > this is a testharness and not a proposed solution. i've got a couple
>> of
>> > > solutions in mind, but before i post them, i'd like to put them in a
>> web
>> > > "container".) As usual, i'm running into problems on the frontend. i'm
>> not
>> > > getting expected callback behavior, and, moreover, the code i'm using
>> used
>> > > to work fine.
>> >
>> > > The snippet code is included below this email's closing. The relevant
>> > > fragment is listed just below. The behavior i see is that the button
>> > > produces no behavior on the server at all. The CR/LF event on the text
>> field
>> > > causes updateWhat to be called twice. Any advice on the frontend
>> behavior
>> > > would be greatly appreciated.
>> >
>> > > def whatNode(termStr : String) = {
>> > > theTerm = termStr
>> > > theClientRequestStr = evalStr()
>> > > var theParseResponseStr : String =
>> > >   ("failure: " + theClientRequestStr + "\n");
>> > > try {
>> > >   theParseResponseStr =
>> > > theREPL.showClientRequestParseTree(theClientRequestStr)
>> > >   println( "parsed : " + theParseResponseStr );
>> > > //theREPL.readEvalPrint(theClientRequestStr)
>> > > }
>> > > catch {
>> > >   case e => {
>> > > val sw : java.io.StringWriter =new java.io.StringWriter( );
>> > > e.printStackTrace( new java.io.PrintWriter( sw, true ) );
>> > > theParseResponseStr = theParseResponseStr + e.toString
>> > >   }
>> > > }
>> > > {theParseResponseStr}
>> > >   }
>> >
>> > >   def updateWhat(str: String): JsCmd = {
>> > > println("updateWhat with " + str)
>> > > JsCmds.SetHtml("parseTree", whatNode(str))
>> > >   }
>> >
>> > >   def show(xhtml: NodeSeq): NodeSeq = {
>> > > 
>> > >   Term :
>> > >   { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id"
>> ->
>> > > "whatField") }
>> > >   { {?("Go")} %
>> > >("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"),
>> s =>
>> > > updateWhat(s))) }
>> > >   
>> > >   {whatNode(evalStr())}
>> > > 
>> > >   }
>> >
>> > > Best wishes,
>> >
>> > > --greg
>> >
>> > > package com.biosimilarity.reflection.snippet
>> >
>> > > import net.liftweb._
>> > > import http._
>> > > import S._
>> > > import SHtml._
>> > > import util._
>> > > import Helpers._
>> > > import mapper._
>> > > import textile._
>> > > import js.{JE, JsCmd, JsCmds}
>> > > import JsCmds._
>> > > import JE._
>> >
>> > > import com.biosimilarity.reflection.model.REPL
>> >
>> > > import scala.xml._
>> >
>> > > class REPLForm {
>> > >   val theREPL = new REPL()
>> > >   var theTerm : String = "lambda x.x"
>> > >   var theClientRequestStr : String = evalStr()
>> >
>> > >   d

[Lift] Re: buttons and textbox

[Meredith Gregory]

Marius,

Thanks for the tip! That gets me a little further. However, what i really
don't understand is why it is that after i have modified the textbox from
"lambda x.x" to "lambda x.(x x)", then when i type
$('#whatField').attr('value') in the javascript evaluation window in firebug
it's returning "lambda x.x". How do i access the contents of the textbox
except by that call?

Best wishes,

--greg

On Sun, May 3, 2009 at 12:11 AM, marius d.  wrote:

>
> Greg,
>
> ajaxCall returns a tuple (String, JsExp) ... so when you use it try
> something like:
>
>  ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> updateWhat(s))._2)
>
> Br's,
> Marius
>
> On May 3, 9:00 am, Meredith Gregory  wrote:
> > Lifted,
> >
> > When i look at the button behavior using firebug, this is the following
> > error i see.
> >
> > F891109765602PT1 is not defined
> > onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
> > (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null,
> null));
> >
> > It would appear that however the
> >
> > ajaxCall(JsRaw("$('#whatField').attr('value')")
> >
> > is working it is setting up a handle that is stale by the time the
> behavior
> > is actually invoked. This is behind-the-scenes stuff for a programmer
> like
> > me. It's part of what lift is s'posed to provide. Moreover, i get no help
> > from the compiler. The code i have written is well-typed. Any help would
> be
> > greatly appreciated.
> >
> > Best wishes,
> >
> > --greg
> >
> > On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
> > wrote:
> >
> >
> >
> > > Lifted,
> >
> > > i'm putting together a little lift-based testharness in which to
> evaluate
> > > various solutions to the challenge Martin posted recently regarding
> scalable
> > > abstractions for a little lambda interpreter. You can get a copy of the
> app
> > > here . (Please
> note:
> > > this is a testharness and not a proposed solution. i've got a couple of
> > > solutions in mind, but before i post them, i'd like to put them in a
> web
> > > "container".) As usual, i'm running into problems on the frontend. i'm
> not
> > > getting expected callback behavior, and, moreover, the code i'm using
> used
> > > to work fine.
> >
> > > The snippet code is included below this email's closing. The relevant
> > > fragment is listed just below. The behavior i see is that the button
> > > produces no behavior on the server at all. The CR/LF event on the text
> field
> > > causes updateWhat to be called twice. Any advice on the frontend
> behavior
> > > would be greatly appreciated.
> >
> > > def whatNode(termStr : String) = {
> > > theTerm = termStr
> > > theClientRequestStr = evalStr()
> > > var theParseResponseStr : String =
> > >   ("failure: " + theClientRequestStr + "\n");
> > > try {
> > >   theParseResponseStr =
> > > theREPL.showClientRequestParseTree(theClientRequestStr)
> > >   println( "parsed : " + theParseResponseStr );
> > > //theREPL.readEvalPrint(theClientRequestStr)
> > > }
> > > catch {
> > >   case e => {
> > > val sw : java.io.StringWriter =new java.io.StringWriter( );
> > > e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> > > theParseResponseStr = theParseResponseStr + e.toString
> > >   }
> > > }
> > > {theParseResponseStr}
> > >   }
> >
> > >   def updateWhat(str: String): JsCmd = {
> > > println("updateWhat with " + str)
> > > JsCmds.SetHtml("parseTree", whatNode(str))
> > >   }
> >
> > >   def show(xhtml: NodeSeq): NodeSeq = {
> > > 
> > >   Term :
> > >   { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id"
> ->
> > > "whatField") }
> > >   { {?("Go")} %
> > >("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s
> =>
> > > updateWhat(s))) }
> > >   
> > >   {whatNode(evalStr())}
> > > 
> > >   }
> >
> > > Best wishes,
> >
> > > --greg
> >
> > > package com.biosimilarity.reflection.snippet
> >
> > > import net.liftweb._
> > > import http._
> > > import S._
> > > import SHtml._
> > > import util._
> > > import Helpers._
> > > import mapper._
> > > import textile._
> > > import js.{JE, JsCmd, JsCmds}
> > > import JsCmds._
> > > import JE._
> >
> > > import com.biosimilarity.reflection.model.REPL
> >
> > > import scala.xml._
> >
> > > class REPLForm {
> > >   val theREPL = new REPL()
> > >   var theTerm : String = "lambda x.x"
> > >   var theClientRequestStr : String = evalStr()
> >
> > >   def evalStr() = theTerm
> > >   def clientRequestRequest() = theClientRequestStr
> >
> > >   def parseTreeNode(clientRequestStr : String) = {
> > > theClientRequestStr = clientRequestStr.replace( "\n", "" );
> > > var theParseResponseStr : String =
> > >   ( "failure: " + theClientRequestStr + "\n" );
> > > try {
> > >   theParseResponseStr =
> > > theREPL.showClientRequestParseTree(theClientRequestStr)
> > > /

[Lift] Re: buttons and textbox

[marius d.]

Greg,

ajaxCall returns a tuple (String, JsExp) ... so when you use it try
something like:

 ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
updateWhat(s))._2)

Br's,
Marius

On May 3, 9:00 am, Meredith Gregory  wrote:
> Lifted,
>
> When i look at the button behavior using firebug, this is the following
> error i see.
>
> F891109765602PT1 is not defined
> onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
> (F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null, null));
>
> It would appear that however the
>
> ajaxCall(JsRaw("$('#whatField').attr('value')")
>
> is working it is setting up a handle that is stale by the time the behavior
> is actually invoked. This is behind-the-scenes stuff for a programmer like
> me. It's part of what lift is s'posed to provide. Moreover, i get no help
> from the compiler. The code i have written is well-typed. Any help would be
> greatly appreciated.
>
> Best wishes,
>
> --greg
>
> On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
> wrote:
>
>
>
> > Lifted,
>
> > i'm putting together a little lift-based testharness in which to evaluate
> > various solutions to the challenge Martin posted recently regarding scalable
> > abstractions for a little lambda interpreter. You can get a copy of the app
> > here . (Please note:
> > this is a testharness and not a proposed solution. i've got a couple of
> > solutions in mind, but before i post them, i'd like to put them in a web
> > "container".) As usual, i'm running into problems on the frontend. i'm not
> > getting expected callback behavior, and, moreover, the code i'm using used
> > to work fine.
>
> > The snippet code is included below this email's closing. The relevant
> > fragment is listed just below. The behavior i see is that the button
> > produces no behavior on the server at all. The CR/LF event on the text field
> > causes updateWhat to be called twice. Any advice on the frontend behavior
> > would be greatly appreciated.
>
> > def whatNode(termStr : String) = {
> >     theTerm = termStr
> >     theClientRequestStr = evalStr()
> >     var theParseResponseStr : String =
> >       ("failure: " + theClientRequestStr + "\n");
> >     try {
> >       theParseResponseStr =
> >     theREPL.showClientRequestParseTree(theClientRequestStr)
> >       println( "parsed : " + theParseResponseStr );
> >     //theREPL.readEvalPrint(theClientRequestStr)
> >     }
> >     catch {
> >       case e => {
> >     val sw : java.io.StringWriter =    new java.io.StringWriter( );
> >     e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> >     theParseResponseStr = theParseResponseStr + e.toString
> >       }
> >     }
> >     {theParseResponseStr}
> >   }
>
> >   def updateWhat(str: String): JsCmd = {
> >     println("updateWhat with " + str)
> >     JsCmds.SetHtml("parseTree", whatNode(str))
> >   }
>
> >   def show(xhtml: NodeSeq): NodeSeq = {
> >     
> >       Term :
> >       { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id" ->
> > "whatField") }
> >       { {?("Go")} %
> >        ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> > updateWhat(s))) }
> >       
> >       {whatNode(evalStr())}
> >     
> >   }
>
> > Best wishes,
>
> > --greg
>
> > package com.biosimilarity.reflection.snippet
>
> > import net.liftweb._
> > import http._
> > import S._
> > import SHtml._
> > import util._
> > import Helpers._
> > import mapper._
> > import textile._
> > import js.{JE, JsCmd, JsCmds}
> > import JsCmds._
> > import JE._
>
> > import com.biosimilarity.reflection.model.REPL
>
> > import scala.xml._
>
> > class REPLForm {
> >   val theREPL = new REPL()
> >   var theTerm : String = "lambda x.x"
> >   var theClientRequestStr : String = evalStr()
>
> >   def evalStr() = theTerm
> >   def clientRequestRequest() = theClientRequestStr
>
> >   def parseTreeNode(clientRequestStr : String) = {
> >     theClientRequestStr = clientRequestStr.replace( "\n", "" );
> >     var theParseResponseStr : String =
> >       ( "failure: " + theClientRequestStr + "\n" );
> >     try {
> >       theParseResponseStr =
> >     theREPL.showClientRequestParseTree(theClientRequestStr)
> >     //theREPL.readEvalPrint(theClientRequestStr)
> >     }
> >     catch {
> >       case e => {
> >     val sw : java.io.StringWriter =    new java.io.StringWriter( );
> >     e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> >     theParseResponseStr = theParseResponseStr + e.toString
> >       }
> >     }
> >     {theParseResponseStr}
> >   }
>
> >   def whatNode(termStr : String) = {
> >     theTerm = termStr
> >     theClientRequestStr = evalStr()
> >     var theParseResponseStr : String =
> >       ("failure: " + theClientRequestStr + "\n");
> >     try {
> >       theParseResponseStr =
> >     theREPL.showClientRequestParseTree(theClientRequestStr)
> >       println( "parsed : " + theParseResponseStr );
> >     //theREPL.readEval