from:"OvermindDL1"


On Wed, Sep 23, 2009 at 7:42 AM, elcologaby elcolog...@gmail.com wrote:

 Hi, I'm doing some research about Google App Engine, and I would like
 to storage information about other applications. I've been reading the
 limitacions, and I found out that I can't red more than 1000 records
 whit a single query. Is there a way for me to be able to read more
 than this amount of records per query (without reading all records,
 because I can't analize this in 30 secconds, which is the servlet
 timeout)? On the other hand, do you know a way to perform GROUP BY
 selects?

Best thing might be to just break it up into multiple smaller things
separated by tasks.

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[google-appengine] Re: Signup/registration system


On Wed, Sep 23, 2009 at 9:40 PM, Tim yau...@willowsoft.com wrote:

 Is Google App Engine a suitable platform for writing a simple web app
 where people can sign up to attend an invitation only event with a
 limited number of people allowed?

It is actually almost stupid easy to allow that.
Why not use Google Calendar though?  It might be functional enough for that...

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[google-appengine] Re: Task Queue Development


On Wed, Sep 23, 2009 at 7:23 PM, oakmad adam.oak...@gmail.com wrote:

 How are people handling task queue execution in their development
 environment? My processing is using task queues to handle a lot of
 offline processing and I'm getting sick of clicking run next to each
 task. I'm thinking I will write a simple script to replicate the queue
 by polling my datastore and calling the url the task would, but before
 I do that I would be interested to hear how others are handling it.

I made a quick Firefox GreaseMonkey script.  Laziness rules all.  :)
It is not at all generic, if I get time I guess I could make it as so
and release it...

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[google-appengine] Re: RSS feed for virtual pages


On Thu, Sep 24, 2009 at 12:20 PM, naitik nakrani
naitiknakr...@gmail.com wrote:
 hello i want to unsubscribe from this group

 my id is naitiknakr...@gmail.com

And?  Go to the Google Groups for it and click Unsubscribe, we cannot
do it for you.

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[google-appengine] Re: Why Google AppEngine sucks


On Thu, Sep 24, 2009 at 7:27 PM, Tim Hoffman zutes...@gmail.com wrote:

 There are some grains for truth, however he fails to detail the effort
 you need to put in to build a moderatley reliable system let alone one
 that can with stand
 multiple failures.

 That alone is worth the price of admission.

 Try building a linux ha cluster with load balancing, failover and
 replicated database.

 Its not easy and requires a lot of expertise.

 Even with all the tools in EC2 its not a simple task,

 I personally don't have a problem with the non sql nature of the
 environment , I only occasionally use SQL for things over the
 last 10 years,

I found the datastore pretty obvious to use, but then again mnasia is
like it.  Ooo, that would be so rather awesome, and relatively easy
for Google to implement, an Erlang back-end, I would use that in a
heart-beat.  It would perform *very* well (better then Python,
probably  not as fast as Java), and the programming style is
*perfectly* designed for this, lots of little Actors with no
interacting data except through the datastore, would be perfect.  :)

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[google-appengine] Re: Why Google AppEngine sucks


On Thu, Sep 24, 2009 at 11:49 PM, Robin B robi...@gmail.com wrote:

 That's interesting you mention Erlang: I was working on building an
 Erlang based App Cluster around the time when AppEngine was announced/
 released.  You can achieve a much higher handlers/cpu or handlers/
 memory density using Erlang because each handler is a green thread
 with cheap context switching, each handler/process costs as little as
 200 bytes of system memory, and system libraries can loaded once into
 memory and shared between all apps because Erlang is a functional
 programming language.  The thing that made me trade Erlang for
 AppEngine was having access to BigTable.

 AppEngine has numerous features (simple deployment, load balancing,
 dynamic scalability), but the main benefit is access to a scalable
 database; BigTable provides seamless multi-master database writes.  If
 a developer has never considered the challenges of scaling database
 write throughput, then they would not realize how much time AppEngine
 will save them in designing and hosting a truly scalable web
 application.

It would not be hard to add BigTable into Erlang though, Erlang is not
that hard to bind to after all.  The Mnasia database built into Erlang
though is fully distributed and fault tolerant and things can be made
to exist on disk or in memory only for speed and all sorts of things,
it is actually quite powerful, just a bit slower then normal SQL
servers of course, due to the distributed nature.  Erlang also has
load balancing, dynamic scalability, and the deployment when using the
Erlang webserver Yaws is quite simple, it is fully ready to handle
just about everything you could ever throw at it, you just need a few
computers to load it on first.  :)

I prefer Python as a programming language (although I would still use
Erlang if AppEngine ever supports it, it is just an awesome language).
 I am using AppEngine because other people requested I did, been
learning it.  :)

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[google-appengine] Re: Case sensitivity

2009-09-19 Thread OvermindDL1

On Wed, Sep 16, 2009 at 12:18 PM, Nick Johnson (Google)
nick.john...@google.com wrote:
Hi Johnc,

I just updated my answer to your question on Stack Overflow. The short story
is that you can do this by writing a handler that redirects users from any
page that includes an uppercase character to the same URL without it. This
could be extended to a handler that goes first in the list and rewrites all
requests, not just ones for static content.

I'd suggest watching the logs and fixing links as you can, though - the
redirect will add a little bit of latency to requests.

http://stackoverflow.com/questions/1428431/switch-off-case-sensitive-urls-in-google-app-engine/1429800#1429800

-Nick

On Wed, Sep 16, 2009 at 3:40 PM, johnc ogmani...@gmail.com wrote:

We recently moved our company website to Google app engine. We have
encountered case sensitivity problems with some of the links in our
website. Some links are uppercase when the corresponding folders on
the server are lowercase. This was not an issue on our old windows
server. Google app engine appears to be case sensitive with URLs. This
is causing broken links.

Does anyone know if there is a way to make our URLs work case
insensitively on Google app engine?

For note, URI addresses are case-insensitive (the www.google.com
part), the path is *NOT* case insensitive, I am guessing you were
either using a broken Windows server or something like Apache with
url-rewrite or whatever it was called. You should never assume
case-insensitivity on a URI path, *ever*.

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[google-appengine] Re: Two accounts with the same username

2009-09-19 Thread OvermindDL1


On Wed, Sep 16, 2009 at 9:31 PM, Eric eric.d.mo...@gmail.com wrote:

 I have logged into the appengine with my gmail name - and I have
 attempted to create a new appengine account with my gmail name - and
 it says that it is not available- however every name I have tried
 ( all within the bounds of what is allowed ) fails the name
 validation.  And I mean every name even bellatrix17893.appspot.com is
 there something going on my user account eric.d.mo...@gmail.com?

I have tried the same thing.  For my testing account before moving
stuff to other domains I wanted an overminddl1.appspot.com, but I
cannot create it.  I just made something like
overminddl1-public.appspot.com or something like that (do not recall
off-hand) for my public testing, a bit more wordy, but meh...

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[google-appengine] Re: Newbie question on filter()


On Sun, Sep 13, 2009 at 10:32 PM, nikihana sr...@animatixstudios.com wrote:

 Hi All,

 I am new to python - so this might be embarrassing - but thanks in
 advance!

 Can somebody tell me why I get an error when I uncomment the line in
 the code below and run it in the appengine interactive shell?

 The error I get is:

 'title =', 'song'
 Traceback (most recent call last):
  File /Users/srini/Desktop/iFaceApps/SVN/unfuddle/iChannel/App
 Engine/App Engine/GoogleAppEngineLauncher.app/Contents/Resources/
 GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/
 google/appengine/ext/admin/__init__.py, line 208, in post
    exec(compiled_code, globals())
  File string, line 22, in module
 TypeError: filter() takes exactly 3 arguments (2 given)


 --code begins

 class Song(db.Model):
  title = db.StringProperty()
  composer = db.StringProperty()

 song = Song()

 song.title = song
 song.composer = me
 song.put()

 query = db.Query(Song)

 attr = 'title'
 value = 'song'

 query_string = '\'' + attr + ' =' + '\', ' + '\'' + value + '\''

 print query_string
 query = Song.all()

 query.filter('title =', song) # no error!
 #query.filter(query_string)    #error!
 result = query.fetch(1000)

 print result[0]

Because filter takes 2 arguments, not 1 (there is also the implicit
'this/self', which is why the error message says 3/2).
If you want to pass a query string in to filter, then make it a tuple
and deconstruct it into the call, as such:

query_string = (attr + ' =', value)

And call filter by deconstructing the tuple as the arguments:
query.filter(*query_string)    #no more error!

The function call parameters is standard programming stuff that is
identical to just about any language, and the deconstructing the tuple
as the argument is very common python stuff.  You might want to learn
some more generic programming stuff first.

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[google-appengine] Re: quiero usar solo la validacion de usuario de django


2009/9/13 JorgeP jorge085l...@gmail.com:

 hola grupo, soy nuevo programando en google engine, pues mi pregunta
 es la siguiente
 he estado configurando el inicio de sesión para que al momento de
 subir mi aplicación solo tengan acceso las personas que sean creadas
 dentro de está... que no tengan cuentas en google...

 he seguido un ejemplo de un articulo que esta publicado el la pagina
 de code.google.com pero me sale un error
 mi codigo es el siguiente

 setting.py

 MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    # Django authentication
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    # Google authentication
    #'ragendja.auth.middleware.GoogleAuthenticationMiddleware',
    # Hybrid Django/Google authentication
    #'ragendja.auth.middleware.HybridAuthenticationMiddleware',

 )

 INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.sessions',
    'django.contrib.admin',
 )


 views.py

 from django.contrib.auth.models import User
 from django.contrib.auth.forms import UserCreationForm
 #

 def crear_nuevo_usuario (request):
    form = UserCreationForm()
    if request.method == 'POST':
        form = UserCreationForm(request.POST)
        if form.is_valid():
            user = form.save(commit=False)
            user.is_active = True
            user.put()
            return HttpResponseRedirect('/login/')
    return shortcuts.render_to_response('crear_usuario.html', {'form':
 form})

 url.py

  (r'^signup/$', 'views.crear_nuevo_usuario'),
  (r'^login/$', 'django.contrib.auth.views.login', {'template_name':
 'crear_usuario.html'}),
  (r'^logout/$', 'django.contrib.auth.views.logout_then_login',
 {'login_url': '/'}),


 y pues me devuelve un error  You haven't set the DATABASE_ENGINE
 setting yet.

 le agradesco de ante mano...

I do not suppose there are some language specific groups for appengine
that we could link him to?

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[google-appengine] Re: Best way to reuse 'error page' code?


I created my own hierarchy on top of the webapp that handles
delegation to member function and so forth.  To handle errors and
other generic error codes I have another class (subclassable) that has
pre-built responses that auto fill the necessary headers, status
codes, and a basic html page to describe it.  The page can pull in one
of those and edit it as it wishes and return it, therefor anything
they have sent to the page previously is erased and only the error
stuff is returned.  It is very simple and executes quite fast.

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[google-appengine] Re: Best way to reuse 'error page' code?


On Mon, Sep 14, 2009 at 2:40 PM, PatHaugen pathau...@gmail.com wrote:

 OvermindDL1,

 The way you describe it, anything they have sent to the page
 previously is erased and only the error stuff is returned sounds like
 you're not stopping at the exact point of error, but continuing to
 draw the rest of the page as the code continues and only after that
 erases what was generated and return only the error page?

No, I do stop at the point of error, but in my design, page output and
code is intertwined (keeping down on file count), so by the time, say,
a database access may fail then stuff may have already been sent to
the sender, I wipe that clean.

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[google-appengine] Re: Best way to reuse 'error page' code?


On Mon, Sep 14, 2009 at 2:58 PM, PatHaugen pathau...@gmail.com wrote:

 I'm with you, I prefer in scripting languages to have a single file to
 hold most of my project so I can backup and work on it anywhere
 easily.

 I used to store page output to a variable in PHP and add to it as the
 code executed, sending to the user only at the end of file and just
 trashing that variable if there was an error. Sounds similar to what
 you're hinting at.

Basically yep.  I created a tree structure in my classes like this:
class someController(myBaseController):
  def index(request,response):
# do stuff

And if I set someController as a variable in another controller or I
stuffed it in as the root controller, say I did a root controller,
then anytime I did my_website.com/index then it would call the above.
The request includes all headers parsed out, the full uri parsed out,
and a lot of other stuff, it is designed to be immutable.  The
response has a header that you can stuff headers in, a content to
stuff the response webpage/file/whatever into, etc...

I can literally just do:
  response.reset(DefaultResponses.error500)
And it kills the original response, overwriting it with the stuff in
the pre-built error505 response, then I am free to edit the response
again as I so wish.  I just have it so if an error is occurred, I do
something like this:
class someController(myBaseController):
  def index(request,response):
# this page will always just error 500 out
if True:
  response.reset(DefaultResponses.error500)
  return

It works quite well for me and my programming style when I am whipping
up small things, very modular and capable.

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[google-appengine] Re: Regarding change of port number


On Mon, Sep 7, 2009 at 3:37 AM, anuanunimmala.nimm...@gmail.com wrote:

 Hi
 Actually  the default port that is used by the SDK bundled  webserver
 (port 8080) is in use by another application
 in my particular ecclipse ide environment,So how can i  use a
 different port.Please provide me with solution by means of step by
 step approach.

In the google app engine launcher, first select your app, then the
edit menu, then application settings, then change the port number
right on that screen.  I changed mine to 8020 since 8080 is in use by
my SVN server.

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[google-appengine] Re: Memcache pattern


On Mon, Sep 7, 2009 at 3:25 PM, (jpgerek)jpguer...@gmail.com wrote:

 Hi, I'm new with python and I having problems to implement the typical
 memcache pattern.

 I wan't to make a decorator of the most common memcache pattern so I
 don't have to implement the logic everytime. My intention is having a
 function that receives the key to get and a callback with the
 datastore gets, in case the memcache key expires, it's evicted or
 whatever.

 This is what I have now:

 class MC():
   �...@staticmethod
    def get( key, get_data_callback ):
        data_set = memcache.get( key )
        if data_set == None:
            data_set = get_data_callback()
            memcache.set( key, data_set )
        return data_set

 I'm having problems with the callback when some params are required.
 For instance:

 class DB():
   �...@staticmethod
    def get_user( id ):
          return User().all().filter('id =', id').fetch(1)

 def get_user( id ):
    return MC.get( key, lambda id: DB.get_user( id ) )

 The error I get when I call 'get_user(1)' is something like:

 TypeError: lambda() takes exactly 1 argument (0 given)

 Though it works in this case:

 def get_user_one():
     return User().all().filter('id = 1').fetch(1)

 It seems to be something with the params, they are lost, could it be
 solved with closures? other approach?

Look at this.  You pass a function/lambda to MC.get, this
function/lambda takes one parameter.  This function/lambda is passed
as the get_data_callback argument, and you then call get_data_callback
in that MC.get function with no parameters.  So why are you calling a
function that you have setup to take one parameter, with no
parameters?

Your
  lambda id: DB.get_user( id )
as you can see, takes one parameter, and it is required.  If you want
the passed in id to only be use, then change it to:
  lambda: DB.get_user( id )
or if you want the passed in id to be default, but overridable, then
change it to:
  lambda id=id: DB.get_user( id )
But the first one *requires* a single argument.

You might want to learn a bit more python first, this has nothing to
do with appengine.  :)

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[google-appengine] Re: App Engine Launcher throws an error in Windows 7


On Tue, Sep 8, 2009 at 12:39 PM, Lee, Duk
(Genworth)duk@genworth.com wrote:
 Hello,



 I know this issue already logged as a bug, but does anyone know how to
 resolve this issue? I do not want to download the missing dll off the Web
 and stick it in somewhere. Thanks.

Might help if you actually state the error; we are not psychic.  :)

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[google-appengine] Re: Authentication