[Zope3-Users] Re: updating a zodb with a SchemaManager
Lorenzo Gil Sánchez wrote: Hi, I've been using a zope.app.generations.interfaces.ISchemaManager to keep my database up to date with respect to the changes in the models of my application and everything is well so far. Now I have a tricky situation. My model had an attribute and now I changed that attribute to be read only. Before: --- class IModel(Interface): attr1 = zope.schema.TextLine() class Model(Persistent): implements(IModel) def __init__(self, attr1=None): self.attr1 = attr1 After: -- class IModel(Interface): attr1 = zope.schema.TextLine(readonly=True) attr2 = zope.schema.TextLine() class Model(Persistent): implements(IModel) def __init__(self, attr2=None): self.attr2 = attr2 def _getAttr1(self): return self.attr2.lower() attr1 = property(_getAttr1) As you can see, now attr1 is a computed attribute from attr2. When updating the old Model objects I add the 'attr2' attribute but I can't remove the old 'attr1' attribute since is still defined in Model but is a totally different thing. I can forget about removing the 'attr1' attribute and things keep working well. The problem is a waste of space in the database since that information is still there but impossible to retrieve, right? I have a related question: is attr1 still saved in the database in the newer version no matter is a read only python property or does the ZODB handle this case? As far as I know ZODB only skip those attributes beginning with _v_ (for volatile), but don't know what it does with python properties... Has anyone ever reached a similar situation? Any solution? You can do this on your instance : del obj.__dict__['attr1'] Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Any performance issues with the macro attribute in the z3c:template directive?
Andreas Johnsen wrote: Hei all Zopers, I find the macro parameter in the z3c:template very useful for working with templates for viewlets and pagelets. I guess it's slower to extract a html-snippet from within a page template file (by including a macro parameter) then including the entire page template file (by not including the macro parameter). So before implementing this technique on a large scale, I want to ask if anyone have experienced any performance issues with this technique? No, there is no performance issue on this. The TAL engine compiles the hole template into memory and caches it. Accessing a macro is just a dictionary lookup. We are using this technique in large projects. Jürgen -- Lovely Systems, senior developer phone: +43 5572 908060, fax: +43 5572 908060-77 Schmelzhütterstraße 26a, 6850 Dornbirn, Austria ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: How do you develop in zope 3?
[EMAIL PROTECTED] wrote: Hello, * How do you develop in zope 3? First a few words: After trying from time to time Zope 3 (X3, 3.0...) finally a month ago I jumped in full time. Thanks to Philipp von Weitershausen's book, my previous problems were solved. So I downloaded the zope 3 tar.gz and started to practice... only to discover eggs, buildouts, paster and friends (yes, pretty much I've been living under a programmer's rock). Well, no problem. After reading http://pypi.python.org/pypi/zopeproject/ and http://pypi.python.org/pypi/zc.buildout I was on track again. So basically, what I do is: # Create a virtual environment $ python2.4 bin/virtual-python.py --prefix=~/zope3/ # install easy_setup $ ~/zope3/bin/python bin/ez_setup.py # Install zopeproject (of course, all these steps are made just once) $ ~/zope/bin/easy_install zopeproject # make the projects $ ~/zope/bin/zopeproject webdev and then edit setup.py, buildout.cfg. and work in src/webdev. So long, so fine. But here come my doubts: *) Is it the way the experienced zope developers work? How do you set the environment for a site or a package development? Except for the zopeproject thing it is the way we work, edit the buildout.cfg and setup.py for the project needs. We also have a versions.cfg and nail all versions to the known working versions. Only update versions if really needed. *) I'm working in more than a package. I'm developing a blog, a user manager, etc. Should I create a new project for each package? How do I include in my site (under development) my packages (under development)? First of all each package should have it's full test environment to be able to developt the package independent of an application. If you want to use the current develop version in you application just set the develop path to your local working copy of the package. *) What recipe do you use to fetch a package via svn? We have no need to fetch packages using svn, we only use eggs. As stated above if you need to use a local develop version of a package we temporarily add a develop path for that package. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: how to model a 1-to-1 relation
john saponara wrote: I want to allow the user to create car and driver objects in a limoService container. Car objects will stand alone, but each driver object should contain a car object by reference (not by value) and the driver add form should allow the user to choose which car the new driver object will have. Should IDriver's car attribute be a schema.Object or a schema.Choice? Have a look at the package zc.relation and for a simple use of zc.relation use lovely.relation which provides relation properties for your objects. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: how to model a 1-to-1 relation
Christophe Combelles wrote: Jürgen Kartnaller a écrit : john saponara wrote: I want to allow the user to create car and driver objects in a limoService container. Car objects will stand alone, but each driver object should contain a car object by reference (not by value) and the driver add form should allow the user to choose which car the new driver object will have. Should IDriver's car attribute be a schema.Object or a schema.Choice? Have a look at the package zc.relation and for a simple use of zc.relation use lovely.relation which provides relation properties for your objects. What is zc.relation compared to zc.relationship? Of course I meant zc.relationship ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: How to add additional layers to skin?
xin ni wrote: Hi, dear all, I am using zope 3.3.1 As ZCML browser:skin is deprecated, how to add addtional layers to an existing skin? interface interface=IYourLayerInterface type=zope.publisher.interfaces.browser.IBrowserSkinType name=YourSkinName / Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: lovely.tag behaviour
Maken Seteva wrote: Hi! I am a bit curious about the behavior of the tagcount when tagging with lovely.tag. Here is a snip from my doctest: Nothing initially sorted(e.getCloud(users=[u'barney'])) [] Update tags for barney e.update(1000, u'barney', [u'foo']) e.update(1000, u'barney', [u'foo', u'bar']) Print them sorted(e.getCloud(items=(1000,), users=(u'barney',))) [(u'bar', 1), (u'foo', 2)] Update and print again: e.update(1000, u'barney', [u'eggs']) sorted(e.getCloud(items=(1000,), users=(u'barney',))) [(u'eggs', 1)] This is exactly the expected behaviour it is described in the engine interface : class ITaggingEngine(zope.interface.Interface): Manangement and Querying of Tags. Tags are small stickers that are specific to an object to be tagged and the user tagging the object. def update(item, user, tags): Update the tagging engine for an item and user and its tags. The item must be an integer, the user can be a string and the tags argument must be an iterable of tag names (strings). This method always overwrites the old tag settings. However, existing tags will not be readded and are just skipped. My first thing i notice is that there is no concept of 'updating' a users tags on an object in the sense that first you add a tag then later you add another tag with the old one being untouched (the tag count for the old one not being incremented every time i update!). Is there a special reason for this philosophy? The way this function works is very convenience, because usually you have a user editing his tags. The you just take the edited list of tags and use update to update the tagging engine. Regards Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Configuring a package to use a file in buildout
In your buildout you do :
[instance]
recipe = zc.zope3recipes:instance
application = app
address = 8080
zope.conf =
product-config my-config-name
storagedir ${buildout:directory}/parts/log
/product-config
If you need the log dir precreated you do :
[extfiledir]
recipe = lovely.recipe:mkdir
path = parts/log
To access the product config from python :
from zope.app.appsetup.product import getProductConfiguration
config = getProductConfiguration('my-config-name')
if config is not None:
path = config.get('logpath')
Use your utility name as my-config-name.
Jürgen
Darryl Cousins wrote:
Hi,
I have a custom logger in a package registered with utility
zope:utility factory=.logger.MyLogger name=logger /
In the code it sets itself a logfile to write to, up to now that has
been in a 'log' directory in the package itself.
Now I want to use a log file which is in the buildout of the
application. How could I go about finding that directory from python
code in the package?
The only route that I have come up with so far is to write a
meta:directive which I can use to register the logging utility with a
file path. Something like:
meta:directive
namespace=http://namespaces.zope.org/rdb;
name=provideLogger
schema=.zcml.IProvideLoggerDirective
handler=.zcml.loggerhandler
/
Which I could use like
provideLogger component=.logger.MyLogger
log=/path/to/log/file /
But there may be a better/easier way. Suggestions?
Regards,
Darryl
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[Zope3-Users] Re: Buildout recipe to create config file from contents in buildout.cfg?
Derek Richardson wrote:
I am using hexagonit.recipe.cmmi to install pound (www.apsis.ch/pound)
in front of zope. After I cmmi, I need to install a config file. I'd
like to include the pound config file in buildout.cfg, like the zcml
section in zc.zope3recipes:application. Is there a simple recipe for
making a file out of a section in the buildout.cfg and putting it in a
particular place? Or is there a 'best' recipe to use to get close? Or is
this a reason to write a new recipe from scratch and contribute it? I
see this simple functionality as having many use cases.
Hi Derek,
this is how we setup our nginx with buildout in front of zope:
[nginx]
recipe = zc.recipe.cmmi
url = http://sysoev.ru/nginx/nginx-0.5.31.tar.gz
extra_options = --with-poll_module
[nginx-ctl]
recipe = lovely.recipe:mkfile
path = ${buildout:bin-directory}/nginx
mode = 0755
content =
#!/bin/sh
PIDFILE=${nginx:location}/logs/nginx.pid
case $1 in
start)
${nginx:location}/sbin/nginx -c
${buildout:directory}/src/lovelybooks/nginx.conf
;;
stop)
kill -QUIT `cat $PIDFILE`
;;
reload)
kill -HUP `cat $PIDFILE`
;;
restart|force-reload)
$0 stop
sleep 1
$0 start
;;
*)
echo Usage: $SCRIPTNAME
{start|stop|restart|reload|force-reload} 2
exit 1
;;
esac
Here we create a start script using lovely.recipe.mkfile .
lovely.recipe also containe mkdir to create a directory.
Hope this helps.
Jürgen
Thanks,
Derek
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[Zope3-Users] Re: Strange ZODB error - Solved: Zalchemy bug
I don't think the recent change to the utility is correct. Because the engine property is now volatile it needs to be recreated any time the utility is garbage collected. Maybe that's the reason for these strange things to happen. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Still trying to connect to ZODB from external
Florian, you should definitely have a look at the package zc.async and/or lovely.remotetask. lovely.remotetask is in heavy use in our applications and contains a scheduler like the scheduler provided in zope. Jürgen Florian Lindner wrote: Hello, I have a function called by a scheduler. Since it operates outside of Zope context I need to create a connection to the ZODB in order to call a utility: db = getUtility(ZODB.interfaces.IDatabase) conn = db.open() root = conn.root().data['Application'] zope.app.component.hooks.setSite(root[cs]) utils = getUtilitiesFor(INewsfeed) for i in utils: print Utility called:, i[0] i[1].sendNotification() conn.close() This produces errors like: Unhandled error in Deferred: Traceback (most recent call last): File /home/florian/Zope3/src/twisted/internet/posixbase.py, line 220, in run self.mainLoop() File /home/florian/Zope3/src/twisted/internet/posixbase.py, line 228, in mainLoop self.runUntilCurrent() File /home/florian/Zope3/src/twisted/internet/base.py, line 561, in runUntilCurrent call.func(*call.args, **call.kw) File /home/florian/Zope3/src/twisted/internet/task.py, line 108, in __call__ d = defer.maybeDeferred(self.f, *self.a, **self.kw) --- exception caught here --- File /home/florian/Zope3/src/twisted/internet/defer.py, line 107, in maybeDeferred result = f(*args, **kw) File /home/florian/Desktop/zope/lib/python/CS/centershock/centershock.py, line 34, in releaseRefreshEvent conn.close() File /home/florian/Zope3/src/ZODB/Connection.py, line 268, in close raise ConnectionStateError(Cannot close a connection joined to ZODB.POSException.ConnectionStateError: Cannot close a connection joined to a transaction What is the right way to do it? Thanks, Florian ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: getting random results out of a catalogs field index
Dominique Lederer wrote:
Christian Theune wrote:
Am Samstag, den 05.05.2007, 17:42 +0200 schrieb Dominique Lederer:
hi
i would like to retrieve a number of *random* entries out of a catalogs field
index.
i tried it with first getting the catalogindex-length an then accessing a
randomized list-index, but this is very slow, because of the large number of
entries in the index.
do you know any better solution?
I'm kind of guessing here.
You say you are:
- querying the catalog
- accessing a random index from the result set
- noticing that this is slow
Does this only happen if the index is very large, e.g. you're retrieving
an element from the end of the result set?
I don't know exactly how the result sets are organized, but this
behaviour would imply that loading a later element triggers something
like loading the earlier elements too. I can't really imagine that.
I think the general problem that this is slow lies in the fact that
randomly selecting elements means
a) you need access to the full list of things
b) applying a sort
Sorting has a complexity of at least O(n log n) which becomes slow
enough for large sets that it's noticable.
BTW: How large is large?
Christian
hi, thanks for the reply, i just managed to improve the performance of my query
significantly:
what i wanted to do was:
- retrieve the len() of the catalog index
- retrieve a list() of the Resultset
- accessing n random results and their objects
to retrieve a random object i did:
query = catalog.apply({'myIndex':(None,None)})
length = len(query)
index_intids = list(query)
intid = all[random.randint(0,len_all-1)]
object = getObject(intid)
which was with 1 items in the index slow (i had to wait 2-3 seconds for a
view to render)
after looking into the field index implementation i changed the above lines to:
length = len(catalog['myIndex']._rev_index)
If you are using FieldIndex use
length = catalog['myIndex'].documentCount()
The FieldIndex holds a counter with the number of entries in the _rev_index.
index_intids = list(catalog['myIndex']._rev_index.keys())
which now works like a charm.
i am not an expert with BTrees so i cant really say what the problem is/was.
len on a btree is slow because it needs to iterate over all keys to
count them!
If possible always avoid using the catalog and use the index directly,
it is much faster!
Jürgen
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[Zope3-Users] Re: Zope 3 port of Zope 2 Scheduler product?
Hi Scott, I added cron job-like behavior to lovely.remotetask. I'm using it to fire events a specific times. If I find some time I will add a generic task which allows to fire a configurable event. Jürgen Scott Deerwester wrote: Has anyone ported the Scheduler product to Zope 3? Scheduler (http://cvs.zope.org/Products/Scheduler) allows you to post events that are fired at some specific time in the future. It uses the Events product, which has been superceded by Zope 3 events. Seems like a very useful thing to have as part of Zope 3, which makes me wonder if somebody's already done the heavy lifting... ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: EditForm fails in SiteManager because of containment constraint
Christophe Combelles wrote: Hello, I have a regular content object which uses the formlib for its edit view. Nothing special, just like a Recipe. But I want this object to only reside in the Site Manager, because it will be used as a configurable local utility (some kind of LocalKitchenTools utility) Everything is perfect, and the EditForm works well until I want to tell this object to be only contained in the SiteManager. So I just add this statement in the interface: containers(ILocalSiteManager) or containers(ISiteManagementFolder) 'container' adds __parent__ as schema.Field attribute to your interface. You need to omit __parent__ in your formlib form_fields definition. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: RFC 4122 UUIDs
Stephan Richter wrote: On Thursday 05 April 2007 15:28, Jürgen Kartnaller wrote: Please do not use an annotation! This is a performance issue. Your data is very small so do not create a new object in the database store it directly as a property on the instance. Every object lookup is expensive, especially if you use ZEO! Hey Juergen, come on! I know you guys are on an optimization trip at Lovely, but this is great information to store on an annotation. The UUID does not usually need to be looked up and is mainly for external world reference, such as feeds like Derek metioned he wanted. The package is also an add-on. You don't need it, then do not use it. As further optimization, Derek mainly needs this id for a very specific set of content types, so I would narrow the subscriber to only give those special types a UUID. I know, everything starts simple, I remember last year when we used our sample data with 12 users and 500 books, now we have 1200 users and 10 books (35 objects registered in the intid utility) in the production system and this is just the beginning. The simple thing is now a complex one and performance is an issue everywhere. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: RFC 4122 UUIDs
Derek Richardson wrote: Martin Aspeli wrote: Derek Richardson-2 wrote: Martin Aspeli wrote: Stephan Richter-2 wrote: On Wednesday 04 April 2007 13:06, Derek Richardson wrote: I am hoping that Zope 3 assigns an RFC 4122 UUID to each content item. If not, I am hoping there is a third-party product to do this. No there is neither. We have an intid utility that guarantees System-wide unique ids. This utility is used at several places most notably the catalog. I would like RFC 4122 UUIDs to provide standard Atom feeds of Zope content [1]. It will be better if Zope itself assigns UUIDs, so that there is a single source and not a possibility of multiple packages assigning different UUIDs to the same content item. You have to write your own utility to generate the UUID. I checked the RFC quickly and our IntIds are certainly not of the format requested by RFC 4122. Presumably, the intid implementation would be a useful reference for such a utility, and this would a good canidate for a general, re-usable package. Martin Good. I would like to write it as a general, re-usable package. Generating RFC 4122 UUIDs is easy - there's a routine for it in the python 2.5 standard libraries and a python 2.3+ version here: http://zesty.ca/python/uuid.html What seems more difficult is how to plug the routine in so that all content items receive one and only one UUID upon creation. Maybe listen for IObjectCreatedEvent and annotate then? Or is there a potential race condition that means events are not the way to go? (Unsure of the depths of Zope 3's architecture) Look at zope.intid; it should be IObjectCreatedEvent or IObjectAddedEvent. Martin I have started coding a uuid package for Zope. zope.intid uses IObjectAddedEvent; I plan to as well. However, the uuid differs from the intid in that I want to store the uuid on the object, rather than in a utility. This will ensure that uuids travel with their objects without having to modify import/export or other code. My initial idea is to use an annotation, but I'm not sure this is right. I'll have to annotate all the content classes in the system, which seems to be a *huge* zcml pain. Any advice for avoiding this? Please do not use an annotation! This is a performance issue. Your data is very small so do not create a new object in the database store it directly as a property on the instance. Every object lookup is expensive, especially if you use ZEO! Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: lovely.remotetask question
Maciej Wisniowski wrote: For startup do this : @component.adapter(IDatabaseOpenedEvent) def startRemoteTask(event): Start the amazon remotetask on startup. db = event.database connection = db.open() root = connection.root() root_folder = root.get(ZopePublication.root_name, None) for site in root_folder.values(): service = component.queryUtility( ITaskService, context=site) if service is not None: if not service.isProcessing(): service.startProcessing() I assume here that the remote tasks are located in one of the site directly contained in root. Works for me now :) For shutdown : I have no solution for this right now. So seems that now it is best to manually click on stop processing button via ZMI before shutting Zope down. Or use zopectl start/stop. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: lovely.remotetask question
Maciej Wisniowski wrote: Hi I want to use lovely.remotetask in Z3 application. Use case is very simple: User views page, this causes long running function to be started and Ajax calls from the page check every second if there is a result. I have: 1. content object (Folderish) with instance of remotetask.TaskService() called 'monitor_service' inside 2. mytask = remotetask.task.SimpleTask(myLongRunningFunction) 3. named utility for 'mytask' The question is how should I start and stop remotetask jobs? Currently, when user enters a page I call (every time): jobid = self['monitor_service'].add(u'mytask', appdict) self['monitor_service'].startProcessing() Then ajax is repeadetly checking for result and when status is Completed I call self['monitor_service'].stopProcessing() It works nice, but after looking into service.py code I see it will break when I'll have few concurrent users. Seems that I should call startProcessing() on zope startup and stopProcessing on zope shutdown? For startup do this : @component.adapter(IDatabaseOpenedEvent) def startRemoteTask(event): Start the amazon remotetask on startup. db = event.database connection = db.open() root = connection.root() root_folder = root.get(ZopePublication.root_name, None) for site in root_folder.values(): service = component.queryUtility( ITaskService, context=site) if service is not None: if not service.isProcessing(): service.startProcessing() I assume here that the remote tasks are located in one of the site directly contained in root. For shutdown : I have no solution for this right now. ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: ZAlchemy demos (z3c.zalchemy) - Unknown directive: engine
Stefan Krumbiegel (Galileo Press) wrote:
I installed Zope3
(http://www.zope.org/Products/Zope3/3.3.1/Zope-3.3.1.tgz) and
z3c.zalchemy from the repository (http://svn.zope.org/z3c.zalchemy/trunk/).
I followed the steps in the README.txt to try the ZAlchemy demos...
An error occured while starting the Zope3 instance:
zope.configuration.xmlconfig.ZopeXMLConfigurationError: File
/web/zope3_instance_worldcookery/etc/site.zcml, line 7.2-7.55
ZopeXMLConfigurationError: File
/web/zope3_instance_worldcookery/etc/package-includes/z3c.zalchemy.demo-configure.zcml,
line 2.0-2.46
ZopeXMLConfigurationError: File
/usr/local/lib/python2.4/site-packages/z3c.zalchemy-trunk-py2.4.egg/z3c/zalchemy/demo/demo_1/configure.zcml,
line 8.2
ConfigurationError: ('Unknown directive',
u'http://namespaces.zalchemy.org/alchemy', u'engine')
I'm almost 100% sure you need to add z3c.zalchemy-configure.zcml and
z3c.zalchemy-meta.zcml to your package-includes.
Jürgen
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[Zope3-Users] Re: NotYet error when creating content during container creation
Christophe Combelles wrote: Hello, I've been spending several hours on a problem which is probably trivial for advanced zope3ers, but it was not for me, so I'm posting the solution in case it's useful for someone (I've not found anything on it). http://mail.zope.org/pipermail/zope3-users/2005-November/001494.html The problem: I want to create a folder, and when this folder is created, several subfolders should be automatically created. And I have a IntId utility. (this is part of the problem). First, I've tried to create the subfolders in the __init__ method of the folder being created. It does not work and fails with a NotYet error. Then, I've tried to create the subfolders in the create method of the AddForm, after the folder has been eventually created. Still too early: NotYet error. I've also tried to create the subfolders in a subscriber on IObjectCreatedEvent, but this is equivalent to the previous attempt : NotYet error. What I've understood is that the transaction that manages the folder is not finished, and the IntId utility is not yet able to get a connection on the ZODB. So I've tried to create an adapter to IConnection for my subfolder, so that it can use the same connection as the folder. But I couldn't. (however it might be possible?). 'NotYet' happens if the object in not connected to a database. The connection to the database exists as soon as your object is added to the object tree in zope. It is not related to a finished transaction. The simple solution is to create the subfolders AFTER the folder has been eventually ADDED with the add method. So in the AddForm, I've replaced the create() method with a createAndAdd method. In this method, I've just created my folder, called add to add it, then only I could create the subfolders and add them to the folder. You can also do this using an event handler for ObjectAddedEvent on your Folder. In this case you do not need to touch any code in your form. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Configure.zcml In Hello World Video On WorldCookery.Com Doesn't Work
Robert Hicks wrote: Mark, Jonathan (Integic) wrote: Here is my configure.zcml file, which is identical to the one Paul Everitt says to write: configure xmlns=http://namespaces.zope.org/browser; page name=hello template=helloworld.html for=zope.app.container.interfaces.Icontainer permission=zope.Public / /configure XML is case sensitive Icontainer should be IContainer... It's not XML that is case sensitive, it is python ! You get the same error if you try to import Icontainer in python (what the zcml directive is actually doing). Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Can't find MessageIDFactory
George Wright wrote: Gidday zope3 users I have been working through the Weitershausen Zope3 book (first edition) and came to stuff on Message IDs and translation domains. I can't import MessageIDFactory (page 125)! from zope.i18nmessageid import MessageIDFactory maybe it should be MessageFactory Juergen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: broken formlib - form.txt example
Vinny, why not using form.Form to derive from : class MyForm(form.Form): form_fields = form.Fields(IOrder, omit_readonly=True) Register this as a page and you are up and running. Jürgen Vinny wrote: Hello, Platform details: # pkg_info | grep zope zope-3.3.0 An object-based web application platform # uname -a FreeBSD the.palaceofretention.ca 6.2-RELEASE #1: # python Python 2.4.3 (#2, Dec 26 2006, 16:13:56) [GCC 3.4.4 [FreeBSD] 20050518] on freebsd6 Using IDLE 1.1.3 Using instructions from: /usr/local/www/Zope3/lib/python/zope/formlib/form.txt With code straight out of it typed into the IDLE editor, saved as form.py and run using the F5 command: === 8 from zope import interface, schema class IOrder(interface.Interface): identifier = schema.Int(title=uIdentifier, readonly=True) name = schema.TextLine(title=uName) min_size = schema.Float(title=uMinimum size) max_size = schema.Float(title=uMaximum size) now = schema.Datetime(title=uNow, readonly=True) from zope.formlib import form class MyForm: form_fields = form.Fields(IOrder) #This sets up a set of form fields from the interface, IOrder. print len(MyForm.form_fields) print [w.__name__ for w in MyForm.form_fields] class MyForm: form_fields = form.Fields(IOrder, omit_readonly=True) def __init__(self, context, request): self.context, self.request = context, request def __call__(self, ignore_request=False): widgets = form.setUpWidgets( self.form_fields, 'form', self.context, self.request, ignore_request=ignore_request) return '\n'.join([w() for w in widgets]) from zope.publisher.browser import TestRequest request = TestRequest() print MyForm(None, request)() # doctest: +NORMALIZE_WHITESPACE Saving and running this gives: === RESTART 5 ['identifier', 'name', 'min_size', 'max_size', 'now'] Traceback (most recent call last): File /usr/local/www/Zope3/mv/lib/python/hello/form.py, line 33, in -toplevel- print MyForm(None, request)() # doctest: +NORMALIZE_WHITESPACE File /usr/local/www/Zope3/mv/lib/python/hello/form.py, line 28, in __call__ ignore_request=ignore_request) File /usr/local/www/Zope3/lib/python/zope/formlib/form.py, line 256, in setUpWidgets IInputWidget) File /usr/local/www/Zope3/lib/python/zope/component/_api.py, line 103, in getMultiAdapter raise ComponentLookupError(objects, interface, name) ComponentLookupError: ((zope.schema._bootstrapfields.TextLine object at 0x8cf53cc, zope.publisher.browser.TestRequest instance URL=http://127.0.0.1), InterfaceClass zope.app.form.interfaces.IInputWidget, u'') Sigh. Am I jinxed? I've been trying to learn zope 3 for six months now. All I want is to be able to make a form from an interface and display the dang thing. Is that too much to ask? /rant Does anyone know what's going wrong? Do I need to upgrade anything? Thanks in advance. Vinny ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: register and unregister Utility
component.provideUtility for a global utility. See zope.component.interfaces.IComponentRegistrationConvenience Or for local utilities registered in a site manager you use the site manager : sm.registerUtility sm.unregisterUtility See zope.component.interfaces.IComponentRegistry Jürgen Florian Lindner wrote: Hello, easy question but I just don't finde the approbiate function. How to register and unregister programmatically an utility? Thanks, Florian ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: register and unregister Utility
Florian Lindner wrote: Am Mittwoch, 27. Dezember 2006 19:15 schrieb Jürgen Kartnaller: component.provideUtility for a global utility. I've found that. See zope.component.interfaces.IComponentRegistrationConvenience Ok, for registering. But what to call for unregistering? (I have a global utility) zope.component.getGlobalRegistry() implements IComponentRegistry Or for local utilities registered in a site manager you use the site manager : sm.registerUtility sm.unregisterUtility See zope.component.interfaces.IComponentRegistry Ok, there is the unregisterUtility function. Where do I get an object implementing this interface? sm = site.getSiteManager() Thanks, Florian Jürgen Florian Lindner wrote: Hello, easy question but I just don't finde the approbiate function. How to register and unregister programmatically an utility? Thanks, Florian ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: proxied list object in a schema
Hi Tim,
Chat must implement IChat
Jürgen
Tim Terlegård wrote:
Would someone like to explain how to use a list in a schema object
without getting ForbiddenAttribute? This is my use case.
class IChat(Interface):
messages = Attribute('Chat messages')
class Chat(Persistent):
def __init__(self):
self.messages = persistent.list.PersistentList()
class class=.chat.Chat
require permission=zope.View interface=.interfaces.IChat /
require permission=zope.View set_schema=.interfaces.IChat /
/class
I have a Chat class that implements IChat and that is declared in
configure.zcml. Both the chat object and the 'messages' attribute are
proxied automatically, right? The require / tags in configure.zcml
adds security declarations to the chat object, but not to the 'messages'
attribute. Am I correct this far?
When I call self.context.messages.append(...) (in a browser page for
IChat) I get ForbiddenAttribute on append. I should get this, so this
is ok. But list or PersistentList has no interface I can use in IChat
instead of Attribute. So I tried using zope.schema.List instead, but
the interface of that was a small subset of what list provides and
doesn't have append either. So I don't know how to add these security
declarations to the 'messages' attribute.
How can I use a list without getting security proxy problems? Do I have
to make my own list implementation and interface?
Tim
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[Zope3-Users] Re: exploring Zalchemy
Hi Catonano.
What version of SQLAlchemy are you using ?
I haven't had a look at SQLAlchemy the last 3 month. Maybe something has
changed in SQLAlchemy.
If you look at the code in AlchemyEngineUtility.getEngine you see that
the engine returned is the plain engine from SQLAlchemy.
It seems that the problem is not in ZAlchemy.
Regards
Jürgen
catonano wrote:
Hello people, hello Jurgen,
last time I wrote, I was at the point that aTable =
sqlalchemy.Table('aTable', z3c.zalchemy.metadata, autoload=True)
doesn't work. I also promised that I would have seen if I could help
with that; Sorry I still can't help.
I would love to succeed in zopezing my MySql database, before anything
else.
So I tried to use the example in the zalchemy readme file as it is. It
doesn't work either !
Please help me !
The work session follows.
PyCrust 0.9.5 - The Flakiest Python Shell
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on
win32
Type help, copyright, credits or license for more information.
import sqlalchemy
import z3c.zalchemy
from z3c.zalchemy.datamanager import AlchemyEngineUtility
engineUtility =
AlchemyEngineUtility('tender','mysql:///root:[EMAIL PROTECTED]/tender',echo=False)
aTable = sqlalchemy.Table('zalch',
... z3c.zalchemy.metadata,
... sqlalchemy.Column('id', sqlalchemy.Integer,
... sqlalchemy.Sequence('atable_id'), primary_key=True),
... sqlalchemy.Column('value', sqlalchemy.Integer),
... redefine=True)
class A(object):
... pass
...
sqlalchemy.mapper(A, aTable) is not None
True
from zope.component import provideUtility
provideUtility(engineUtility)
z3c.zalchemy.createTable('zalch')
import transaction
txn = transaction.begin()
session = z3c.zalchemy.getSession
session()
[2006-11-05 14:53:19,500] [pool] : Error on connect(): (Connection
failed) (OperationalError) (1045, Access denied for user
'ODBC'@'localhost' (using password: NO))
sqlalchemy.orm.session.Session object at 0x0200D990
It tries to connect to MySql with [EMAIL PROTECTED] usng password: no
But the engineUtility I created had a completely different URL ! Maybe I
wrote the url incorrectly ?
Also a simpler url gives the same url.
Look at this
Py 0.9.5
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on
win32
Type help, copyright, credits or license for more information.
import sqlalchemy
import z3c.zalchemy
from z3c.zalchemy.datamanager import AlchemyEngineUtility
engineUtility = AlchemyEngineUtility('tender', 'mysql:///[EMAIL PROTECTED]')
eng = engineUtility.getEngine()
eng.connect()
[2006-11-06 01:04:57,983] [pool] : Error on connect(): (Connection
failed) (OperationalError) (1045, Access denied for user
'ODBC'@'localhost' (using password: NO))
Traceback (most recent call last):
File input, line 1, in ?
File build\bdist.win32\egg\sqlalchemy\engine\base.py, line 477, in
connect
File build\bdist.win32\egg\sqlalchemy\engine\base.py, line 179, in
__init__
File build\bdist.win32\egg\sqlalchemy\engine\base.py, line 500, in
raw_connection
File build\bdist.win32\egg\sqlalchemy\engine\default.py, line 42, in
get_connection
File build\bdist.win32\egg\sqlalchemy\pool.py, line 95, in connect
File build\bdist.win32\egg\sqlalchemy\pool.py, line 172, in __init__
File build\bdist.win32\egg\sqlalchemy\pool.py, line 108, in get
File build\bdist.win32\egg\sqlalchemy\pool.py, line 294, in do_get
File build\bdist.win32\egg\sqlalchemy\pool.py, line 91, in
create_connection
File build\bdist.win32\egg\sqlalchemy\pool.py, line 131, in __init__
File build\bdist.win32\egg\sqlalchemy\pool.py, line 155, in __connect
File build\bdist.win32\egg\sqlalchemy\engine\default.py, line 33, in
connect
DBAPIError: (Connection failed) (OperationalError) (1045, Access denied
for user 'ODBC'@'localhost' (using password: NO))
What's wrong with these sessions ?
Thanks so much for any hint
Bye
Catonano
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[Zope3-Users] Re: viewtemplate
Hi Jakub. eXt wrote: Hi all I recently read Stephan Richter's blog post: http://blogs.lovelysystems.com/srichter/2006/09/20/the-skin-browser-and-lovely-systems-new-development-workflow and intendent scope of viewlets thread: http://thread.gmane.org/gmane.comp.web.zope.zope3.user/4652/focus=4652. I like the idea behind viewtemplate very much (separation of template and view code), but I've some problems with putting all of this together. Let me summarize: 1. Views and Viewlets belong to the layer 2. Templates belong to the skin 3. ViewletManagers belong to.. ? 4. Lovely's packaging practices says that: - views should be placed and registered in project.browser.layer.subpackage_for_the_view_impelentations - templates should be placed and registered in project.browser.skin package - viewletmanagers... ? Where you place and register your code and templates is up to you. Right now we do this : Layer : view, viewlet and viewletManager code simple template which are not skin dependent Skin : templates registered for the views and viewlets I also use the macro feature from the template tag heavily. If you don't plan to reuse your code in different skins registering everything on the layer or skin will work too. It is also possible to first register everything on the layer. Then you will have a running application. If you need to provide another skin you just register the parts to replace on the new skin. ViewletManagers may have a class and a template, VMs are called from templates, viewlets are registered for VMs. Shouldn't it be resolved by template tag which registers a template with ViewletManager as it is done for Viewlets and Views? Of course you can use all the features for ViewletManagers especially the RegisteredPageTemplate is perfect for ViewletManagers too. A ViewletManager is just a special case of a ContentProvider (have a look at the interfaces). One more thing is a layer declaration such as (from Stephan's post): browser:viewlet name=bloglist for=myproject.interfaces.IBlog manager=myproject.browser.interfaces.IContent view=myproject.browser.blog.BlogPage class=myproject.browser.blog.BlogList layer=myproject.browser.IProjectLayer permission=zope.Public / while template is registered for skin: browser:template template=bloglist.pt layer=myproject.browser.skin.IProjectSkin for=myproject.browser.blog.BlogList / I'm pretty new to the skinnig concept. What is the purpose of IProjectLayer? Is it that views and viewlets are registered to IProjectLayer which is project marker interface, while templates are registered for skins. As a result we have stable project's code base and skins which are just templates. Yep Any discussion on the above topics will be appreciated :) ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Seeking a ZCML Example for a CSSViewlet
Thierry Florac wrote: Le samedi 07 octobre 2006 à 17:00 +1300, Darryl Cousins a écrit : configure zcml:: browser:viewlet name=layout.css for=* manager=barrysmithgallery.layer.public.ICSS permission=zope.Public class=..BRSPublicLayerLayoutCSSViewlet layer=barrysmithgallery.layer.public.IBRSPublicBrowserLayer weight=2 / Maybe I'm wrong, but it seems that the weight parameter is not used by the default implementation of the CSS viewlet manager... Correct ? Correct, but look at z3c.viewlet. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Intended scope of viewlets?
Hi Alec Alec Munro wrote: Hi Jürgen, So, just to give a concrete example for my case, I might replace this (Metal-based): body div id=Navigation div metal:define-slot=navigation Nav tree needs a wee bit of work. /div /div div id=Content div metal:define-slot=body Some Content /div /div /body with this (viewlet-based): body div id=Navigation span tal:replace=structure provider:my.project.navigation Nav tree needs a wee bit of work. /span /div div id=Content span tal:replace=structure provider:my.project.content Some Content /span /div /body exactly With seperate viewlet managers for navigation and content, or any other types of views I would expect to have on this page? Would a header viewlet manager also be sensible, say if I wanted a title that changed format depending on what type of content was being viewed? What you need is up to your application. You can define a header manager which the changes its content/viewlets depending on the page viewed. Finally, are there any best practices for packaging in viewlet-based templating? I'm currently creating this in my.project.browser.skin. Our current structure is : project.browser.layer.packages for the view implementations Here we provide the view code and the viewlet registrations. project.browser.skin Here we provie the templates and the template registrations using z3c.viewtemplate. How about the viewlet manager names, should they be my.project.*, my.project.browser.*, or something different? We use the interface name as the manager name. Probably some of these questions aren't relevant to the work you are doing on viewlets, but I find it helpful to try to follow industry practices as closely as possible, especially on something I don't have much experience with, so I am easily able to follow tutorials, and people who are helping me can more easily understand what I am trying to do. Thanks very much for your help so far, I am excited about implementing viewlets in our upcoming project. Alec On 10/5/06, Jürgen Kartnaller [EMAIL PROTECTED] wrote: Hi Alec. Alec Munro wrote: Hi List, I'm just getting up to speed with viewlets, having read a thread here and there in the past about them. I've installed the examples provided on this list, and while I believe I understand how they work, I don't understand in what circumstances they are most useful. The viewlets in the examples are all very small, such as retrieving an formatting a single piece of information about an object. However, from some of the posts to this list, I get the impression they are also being used for more complex items, like navigation menus. Menus are a perfect example for the use of viewlets. Have a look at z3c.menu. This package contains a base implementation for menus based on viewlets. Is there a recommended scope? Can they be described in a way such as develop your templates up to point X, then use a viewlet for development of further depth?. In my case, I am developing a new skin for a project, and my experience with metal says to make the entire HTML page a macro with slots for content and navigation. Is there a comparable viewlet-based paradigm? Yes there is one, see below Also, am I correct in stating that when working with viewlets, the only complete HTML page will be the primary skin file, with all viewlets based on snippets of HTML? Thats exacly what we at Lovely Systems do and it works perfectly :) We have one base template which is used for all pages. Instead of defining slots to be filled by other templates it contains viewlet managers. We then provide different view classes to be able to register our viewlets for the pages of the application. The view classes are empty classes they are just providing the class name or if they provide additional functionality they also provide an interface. It is then possible to register the viewlets for specific pages. The most important thing on viewlets is that they are adapters on the *context*, the *request*, the *view* and the *manager*. The viewlet solution is an extremely productive way to implement a complex application. Make sure you read this : http://blogs.lovelysystems.com/srichter/2006/09/20/the-skin-browser-and-lovely-systems-new-development-workflow/ Stephan Richter describes here our use of the viewlet concept and our development workflow. The most important part was the development of the package z3c.viewtemplate. This package makes it possible to separate the development of the HTML page from the implementation of the python view class. The package is not yet perfect but gives us what we need right now but it needs a better integration into forms and viewlets. Expect more in the near future! In our applications really everything is done using viewlets, there is no single use of fill-slot in the hole application! My questions are fairly broad-ranging, I know, but I have thus far been unable to find
[Zope3-Users] Re: Intended scope of viewlets?
Hi Alec. Alec Munro wrote: Hi List, I'm just getting up to speed with viewlets, having read a thread here and there in the past about them. I've installed the examples provided on this list, and while I believe I understand how they work, I don't understand in what circumstances they are most useful. The viewlets in the examples are all very small, such as retrieving an formatting a single piece of information about an object. However, from some of the posts to this list, I get the impression they are also being used for more complex items, like navigation menus. Menus are a perfect example for the use of viewlets. Have a look at z3c.menu. This package contains a base implementation for menus based on viewlets. Is there a recommended scope? Can they be described in a way such as develop your templates up to point X, then use a viewlet for development of further depth?. In my case, I am developing a new skin for a project, and my experience with metal says to make the entire HTML page a macro with slots for content and navigation. Is there a comparable viewlet-based paradigm? Yes there is one, see below Also, am I correct in stating that when working with viewlets, the only complete HTML page will be the primary skin file, with all viewlets based on snippets of HTML? Thats exacly what we at Lovely Systems do and it works perfectly :) We have one base template which is used for all pages. Instead of defining slots to be filled by other templates it contains viewlet managers. We then provide different view classes to be able to register our viewlets for the pages of the application. The view classes are empty classes they are just providing the class name or if they provide additional functionality they also provide an interface. It is then possible to register the viewlets for specific pages. The most important thing on viewlets is that they are adapters on the *context*, the *request*, the *view* and the *manager*. The viewlet solution is an extremely productive way to implement a complex application. Make sure you read this : http://blogs.lovelysystems.com/srichter/2006/09/20/the-skin-browser-and-lovely-systems-new-development-workflow/ Stephan Richter describes here our use of the viewlet concept and our development workflow. The most important part was the development of the package z3c.viewtemplate. This package makes it possible to separate the development of the HTML page from the implementation of the python view class. The package is not yet perfect but gives us what we need right now but it needs a better integration into forms and viewlets. Expect more in the near future! In our applications really everything is done using viewlets, there is no single use of fill-slot in the hole application! My questions are fairly broad-ranging, I know, but I have thus far been unable to find a straightforward explanation of viewlets, in terms of how they relate to general site development. All I can tell you now is : USE VIEWLETS, USE VIEWLETS, USE VIEWLETS, Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: absolute_url in the viewlet ?
Or simply : from zope.traversing.browser.absoluteurl import absoluteURL absoluteURL(self.context, self.request) Jürgen [EMAIL PROTECTED] wrote: self.context.absolute_url looks very zope2ish, absolute_url is no longer inherited, it is an adapted component, so I believe the accepted Zope3 way is... from zope.app import zapi from zope.app.traversing.browser.interfaces import IAbsoluteURL . def render(self): url = zapi.getMultiAdapter( (self.context, self.request), IAbsoluteURL) return liIAbsoluteUrl == %s//li % url Kevin Smith - Original Message From: Christophe Combelles [EMAIL PROTECTED] To: zope3-users@zope.org Sent: Monday, October 2, 2006 7:14:22 PM Subject: [Zope3-Users] absolute_url in the viewlet ? Hi, How can I obtain the absolute_url of the context object in a content provider or in a viewlet ? For example, in the demo3 of zope3demos, the render() method of the viewlet returns self.context.__name__. ( http://zope3demos.googlecode.com/svn/trunk/demo3/demo.py ) How could I tell it to return the absolute_url instead of the __name__ ? (self.context.absolute_url gives a ForbiddenAttribute error.) thanks, Christophe ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: SqlAlchemy
Hi catonano.
As the developer of the z3c.zalchemy package let me give you a short
introduction to zalchemy :
Zope3 contains a transaction mechanism which allows to plug in as many
transaction managers as you like. The main purpose of the zalchemy
package was to integrate SQLAlchemy into Zope3's transaction handling.
Actually the package provides this by implementing a data manager which
joins Zope3's transactions when needed.
when needed in this case means, any time a session is requested from
zalchemy via the getSession method a data manager for the current thread
is activated.
The hole complexity of Zope3's transaction system is now behind the scenes.
See also my notes below.
And don't forget to read the README in z3c.zalchemy ;)
Jürgen
catonano wrote:
Hello zopers,
well this email is going to be quite long, I'm sorry I have many things
to say
I saw the Zope 3 book, particulary the mapping (adapting) between the
persistent objects defined there (a messageboard and a message objects)
and some ftp files (and folders).
Now, I'd like to do the same with some, say, objects that are in a MySql
database. I would love to realize a folders/files hierarchy that's
mapped on my relational database !
I saw SqlAlchemy. It's impressive. I took a look at the Zalchemy code
too, just to see wether I could borrow something.
I made a plan about how to achieve all this. I would like to expose it
here and ask you, kind zopers, wether it's sane or there's something BIG
I'm missing.
Because in the Zalchemy code I saw something I don't understand so I
started to fear that there is something big I'm missing, indeed.
So, my plan is:
1) introduce all my tables and relationships between them. Something
like users = Table('users', metadata, autoload = True)
If you use zalchemy, make sure you use z3c.zalchemy.metadata
and then overriding some table property where needed, also introducing
some relationships, all what needed
2) define some interfaces as in the Zope 3 book, introducing containers
and contained objects
3) define implementation classes for the interfaces that in their
methods do something similar to what I saw in SQLAlchemyContainer, for
example, which is, say,
def __setitem__(self, name, item):
session = z3c.zalchemy.getSession() #in my case I still don't
know where I'll take the session from
If you use zalchemy this is how to get the session, that's it, no other
case!
session.save(item)
session.flush([item])
4) adapt these components to files, as in the book example
Could this be a good plan ?
Because in the Zalchemy code I saw a strange class, that is:
class AlchemyDataManager(object):
Takes care of the transaction process in zope.
implements(IDataManager)
This is the transaction manager mentioned above.
shall I take care of this transaction process too ?
Of course :
- it makes your life easier because zalchemy takes care of it
- it makes sure nothing is commited in case of errors or on write conflicts
Because I know nothing about it and saw not so many docs about the
internal Zope3 machinery.
Thanks so much for any hint
Bye
Catonano
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[Zope3-Users] Re: nextUrl(), passing state in formlib
Hi Martin.
I did it this way :
The Edit Form implementation :
class AddClub(zope.formlib.form.AddForm):
base_template =zope.formlib.form.AddForm.template
template = ViewPageTemplateFile('club_add.pt')
...
def referer(self):
returnself.request.form.get('referer')\
or self.request.getHeader('HTTP_REFERER')
def nextURL(self):
return self.request.form.get('referer','..')
The template ('club_add.pt') :
div metal:use-macro=view/base_template/macros/main
div metal:fill-slot=extra_info
input type=hidden name=referer value= tal:attributes=value
view/referer /
/div
/div
Hope this helps
Jürgen
Martin Aspeli wrote:
Hi,
I have an add form (and later, an edit form) that may be invoked from a
particular view among a few choices. That is, the user can be at @@foo
or @@bar, click add X or edit Y.
When the form is successfully submitted (i.e. validated) I want to send
the user back to @@foo or @@bar depending on where they originally came
from.
Add forms (and my custom edit handler for the edit form) have a
nextUrl() method to work out what the next URL should be. However, I
need to pass the state of which page I came from along the requests.
Using HTTP_REFERER doesn't work, because when it comes to the save
button handler, the referer is the add form I was just on.
One way would be to put a hidden field in the form that looked at the
referer the first time it was rendered and then passed that state along
subsequent requests. However, I really need a generalisable solution
(there will be many of these add and edit forms for different objects).
Having a custom pageform template for all of them (I can make them all
use a custom base class) would be one option, but I'd rather avoid it if
I could, since this'd need to repeat all the other code in the pageform
that I'd rather not have to keep manually in sync when the original
version changes or bugs are fixed.
Is there some other way of passing this kind of where did I originally
come from information along?
Martin
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[Zope3-Users] Re: formlib, action decorators and inheritance
Hi Lorenzo.
Lorenzo Gil Sanchez wrote:
Hi,
I have an add form which a subclass of form.AddForm. It just adds a
'cancel' action.
This is my code:
class AddView(form.AddForm):
Try this here :
actions = form.AddForm.actions
form_fields = form.Fields(IDocument).omit('__name__')
def create(self, data):
return Document(**data)
def nextURL(self):
url = zapi.absoluteURL(self.context.context, self.request)
return url
@form.action(u'Cancel', validator=always_good)
def handle_cancel(self, action, data):
self.request.response.redirect(self.nextURL())
When I define the 'cancel' action using the @form.action decorator it
seems that the 'add' action is lost. That action is defined in my super
class.
As a workaround I do the following:
def handle_cancel(self, action, data):
self.request.response.redirect(self.nextURL())
actions = form.AddForm.actions + form.Actions(
form.Action(u'Cancel',
success='handle_cancel', validator=always_good),
)
but I'm not sure if I'm missing something since my workaround is uglier
than the decorator solution.
Best regards,
Lorenzo Gil
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[Zope3-Users] Re: formlib: Some additional text
Hi Florian.
I do it this way :
The template :
div metal:use-macro=view/base_template/macros/main
div metal:fill-slot=extra_info
input type=hidden name=referer value= tal:attributes=value
view/referer /
/div
/div
The class :
class ViewIt(form.DisplayForm):
base_template =zope.formlib.form.DisplayForm.template
template = ViewPageTemplateFile('newTemplate.pt')
Jürgen
Florian Lindner wrote:
Am Freitag, 5. Mai 2006 17:10 schrieb Fred Drake:
On 5/5/06, Florian Lindner [EMAIL PROTECTED] wrote:
Now I want to place some additional text above the form stuff. But I
want to keep all this usefull JavaScript stuff that form lib inserts.
Can you use the extra_info slot?
I think that would work. (I've looked at its position in
zope/formlib/pageform.pt).
But how can I fill that slot?
I've tried by adding a template to the configure.zcml:
html metal:use-macro=context/@@standard_macros/page
body
metal:block fill-slot=body
/metal:block
/body
/html
@@standard_macros/page is my template in my skin. The skin is derived from
the
rotterdam skin.
Where do I add the fill-slot? I've tried a various locations in the template
above but nothing has a real effect.
Thanks,
Florian
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[Zope3-Users] Re: Re : Re : formlib problem
Stéphane Brault wrote:
Hi Jim,
the Items object is my object, linked to my items, table which implements
the IItems interface I use for my form:
from neteven.interfaces.items import IItems
from zope.formlib import form
class ItemsForm(form.EditForm):
form_fields = form.Fields(IItems)
form_fields = form_fields.omit('dateLastUpdate')
Items is defined this way:
from zope.interface import implements
from sqlobject import *
from sqlos import SQLOS
from neteven.interfaces.items import IItems
class Items(SQLOS):
implements(IItems)
class sqlmeta:
table = 'items'
When I add this zcml declaration :
browser:page
for=.interfaces.items.IItems
name=edit.html
class=.forms.items.ItemsForm
menu=zmi_views
title=Edit a Item
permission=zope.ManageContent
/
everything works fine from the ZMI (I created simple containers to test
that).
My JSON server side code is:
def getItemEdit(self, itemId):
item = Items.get(itemId) #a sqlos function to get an Item instance
from the table given its Id
return ItemsForm(item, self.request)()
After the request from the database your item has no location and is
therefore not physically locatable.
If you use it from within an SQLOS container the container puts the item
into a location proxy.
That's the difference between your test in the ZMI and this code.
Jürgen
The fact is I don't use any page template right now ( though I might do this
later to have a nice GUI).
Thanks,
Stéphane
- Message d'origine
De : Jim Washington [EMAIL PROTECTED]
À : Stéphane Brault [EMAIL PROTECTED]
Cc : zope3-users@zope.org
Envoyé le : Mercredi, 19 Avril 2006, 5h01mn 09s
Objet : Re: Re : [Zope3-Users] formlib problem
Stéphane Brault wrote:
Hi again,
sorry to be a bore ;-)
I keep on trying to use formlib, I no longer have a problem of adapters for
my fields but I get this error:
2006-04-19T16:13:32 ERROR root
C:\Python24\Lib\site-packages\zope\publisher\publish.py line 138 in publish
= 'result = publication.callObject(request, object)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\app\publication\zopepublication.py line
161 in callObject
= 'return mapply(ob, request.getPositionalArguments(), request)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\publisher\publish.py line 113 in mapply
= 'return debug_call(object, args)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\publisher\publish.py line 119 in
debug_call
= 'return object(*args)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
c:\ZopeInst\lib\python\neteven\database\items.py line 43 in getItemEdit
= 'return ItemsForm(item, self.request).render()'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\formlib\form.py line 733 in render
= 'self.form_result = self.template()'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\app\pagetemplate\viewpagetemplatefile.py
line 83 in __call__
= 'return self.im_func(im_self, *args, **kw)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\app\pagetemplate\viewpagetemplatefile.py
line 51 in __call__
= sourceAnnotations=getattr(debug_flags, 'sourceAnnotations', 0),
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\pagetemplate\pagetemplate.py line 117 in
pt_render
= 'strictinsert=0, sourceAnnotations=sourceAnnotations)()'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py line 277 in
__call__
= 'self.interpret(self.program)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceClass zope.app.traversing.interfaces.IPhysicallyLocatable)
C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py line 352 in
interpret
= 'handlers[opcode](self, args)'
** exceptions.TypeError: ('Could not adapt', Items at 0x3d7ce30,
InterfaceCla
ss
[Zope3-Users] Re: zalchemy alpha svn repository
Let's first see if it works as expected. I really have no idea if it is usefull for full blown applications. I only tested my use cases, we'll see what happens if someone else uses it. Since the repository is online I did a lot of changes and impovements and I'm constantly working on. I'm now starting to use it within my new application. Jürgen David Pratt wrote: Hi Jurgen! This is excellent news. Thank you for this work! I will also look at the code to see what I can do to contribute. That's why it's public available :) I think it would be great for you to post an announcement to the SQLAlchemy list. There are folks there in tune with core SQLAlchemy code that may also be able to offer advice or recommendations. Actually there seems to be a change on the way related to the transaction management in sqlalchemy which I would appreciate. I also hope that folks like Brian, Florent and Sidnei will take time to review the code. Many thanks for your efforts! Regards, David j.kartnaller wrote: Hi all. As promised I set up a repository with my SQLAlchemy integration work. Actually it works under my test cases. The main part is the integration of the transaction process into zope so that it is transparent to the user. Someone with more SQLAlchemy experience should have a look at the data manager. I'm not completely sure if it is correctly integrated into the tpc process. There are a lot of open issues mentioned in TODO.txt The tests pass by using sqlite. I did a short test with MySQL which only worked with InnoDB tables. For a simple use I added a container class which is able to show objects mapped to a SQLAlchemy table. See the demo in demo/zalchemy. For the use of the ZCML directives see zalchemy/tests/test_directives.py and the demo. Checkout with : svn co svn://svn.kartnaller.at . Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users -- --- Jürgen Kartnaller mailto:juergen_at_kartnaller.at http://www.kartnaller.at http://www.mcb-bregenz.at --- ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Traversal Tricks (was Seeking Reference Guide on TAL/TALES/METAL)
Jeff Rush wrote: I need control over which namespace is searched, so I added a couple of generic TALES namespace adapters. Now I can do: h1 tal:content=context/attribute:name / How about : h1 tal:content=context/++attribute++name / to -only- search for a name attribute, and (less frequently): h1 tal:content=context/item:ABC123 / h1 tal:content=context/++item++ABC123 / See zope.app.traversing for other namespaces. Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: how to make static pages
Lorenzo Gil Sanchez wrote: Hi, I'd like to ask what's the best way to create static html pages inside my application. For example, the intro page, a help page or a legal conditions page. I have a skin inside a browser package but if I understand them correctly the provide views for content objects. Do I need to create a content object for the each of my static pages? Can I create a template with just the information (e.g. a view without a content)? Declare your page in zcml : browser:page name=static.html for=* template=yourFilenameOfThePageHere permission=zope.View / Sorry, I'm a little bit lost here Best regards Lorenzo Gil -- --- Jürgen Kartnaller mailto:juergen_at_kartnaller.at http://www.kartnaller.at http://www.mcb-bregenz.at --- ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Prevent Duplicate Persistency
Dax wrote: Thanks a lot, Mats. This is a way to do it, but if I were to add a name schema to IMark and checkName on the actual name, then I would not be able to do this for url as well, right? So my question is how would I do this for url without having url as the name for the Mark object? You should have a look at formlib/form.txt. See section Invariants. Jürgen On 3/15/06, Mats Nordgren [EMAIL PROTECTED] wrote: This could be done by using the URL as the name for the Mark object. from zope.app.container.contained import NameChooser Class MarkNameChooser(NameChooser): def chooseName(self, name, object): name = object.url self.checkName(name, object) return name adapter for=.interfaces.IMarkContainer provides=zope.app.container.interfaces.INameChooser factory=.bookmarks.MarkNameChooser / Make sure your Mark object is configured with set_before_add addform ... set_before_add=url / -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dax Sent: Tuesday, March 14, 2006 8:00 PM To: zope3-users@zope.org Subject: [Zope3-Users] Prevent Duplicate Persistency For the following example (taken from Zope3 In 30 Minutes): class IMark(Interface): This is the book mark object. url = TextLine( title=uURL/Link, description=uURL of the website, default=uhttp://www.zope.org;, required=True) description = Text( title=uDescription, description=uDescription of the website, default=u, required=False) How can I prevent Mark objects from having the same url? So if a Mark object exists in BookMarker with Mark.url=http://www.zope.org/;, how can I prevent another Mark object from being added when its url is http://www.zope.org;? Thanks. ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users -- --- Jürgen Kartnaller mailto:juergen_at_kartnaller.at http://www.kartnaller.at http://www.mcb-bregenz.at --- ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Creating objects in software space when making site
Joseph Method wrote: This should definitely be a prominent How-To somewhere. Definitely, but where is somewhere ! Maybe in the upcoming zope3.org website ? Jürgen -- --- Jürgen Kartnaller mailto:juergen_at_kartnaller.at http://www.kartnaller.at http://www.mcb-bregenz.at --- ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: redirects in a formlib EditForm
Gary Poster wrote:
On Feb 26, 2006, at 4:17 PM, jürgen Kartnaller wrote:
Joel Moxley wrote:
** What is the best way to use a formlib EditForm to redirect a user
after applying changes without fully cloning a handle_edit_action
method? **
I'm doing it this way :
def render(self):
if self.errors is None or self.errors:
return super(EditPerson, self).render()
self.request.response.redirect('..')
Jürgen
Thanks Jürgen! That works perfectly for me.
Looking one step forward, I would like to redirect the user back to
the previous page from whence they came (without using sessions). I
figure I am going to need to stash that value on my EditForm class and
then pull it up during the redirect in my render method. I've done my
best to explore this, but I can't figure out where the previous page
information will be available on my EditForm.
** Where should I stash previous page information for future redirects
on my EditForm? **
That's also an unsolved use case I have.
The 'default' template of 'FormBase' contains the slot 'extra_info'
which could be filled with some hidden input fields.
I defined a new template for my own EditForm.
But now I would like to use the existing template in formlib
'pageform.pt' and fill the slot but don't know how.
Is this a possible way and the right way ?
How can I use the existing template ?
It must be useable with metal:use-macro somehow.
Yes, we write custom templates that use hidden input fields. We reuse
the existing template by putting the default template on another
attribute of the view class, and then saying 'metal:use-macro=view/...'
For instance
class MyForm(zope.formlib.form.EditForm):
base_template = zope.formlib.form.EditForm.template
template = (...a named template if you want, or just a page template
directly...)
Then in your template, you can refer to macros in the original like this:
'metal:use-macro=view/base_template/macros/extra_info'
Thanks a lot for this.
The above metal statement doesn't work, I do it this way :
metal:use-macro=view/base_template/macros/main
and then
metal:fill-slot=extra_info
Jürgen
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