Re: [Zope3-Users] Access to request in content object and object path in doctests
I do lots of database stuff, like what you're describing. I got lost in the threads here, but my general advice is the following: 1. Do not mix content with views, this destroys the scalability aspects of Zope and will hurt you later. When ever you find Zope frustrating it often because you're trying to do something that is not in your best interests. 2. Generally you will want to create content with methods that can perform the database operations you would like. For example, I recently created a Container/Folder that contains object from a database. The container is persistent. The container however loads the content from an SQL database. I can then edit and view the objects from the SQL database like ZODB objects. I have some code that I can share here. In another example, which may suite your needs, I created a Zope site in which customers can lookup orders by an order id. My content object is effectively a class Order, which has a method, getOrderById, and that takes an order id as the parameter. getOrderById() queries the database and returns the order as a dictionary. My view is a page that simply calls self.context.getOrderById() with the orderid as the first parameter. The advantage of this approach is that you can de-couple the database from the view and content objects. You can the ability to do lots of other cool stuff as well, like create XML-RPC views without having to do much extra coding (because all the code is hidden in your content object). 3. There are times when your content and views will need to mesh a bit more tightly. In this case, you can create views on your context object. I'm not very good with zope terminology at times, but this view is a different zope:view than the browser:view. For example, I have a shopping cart application and the cart of course is different for each client. The cart also resides in an SQL database. So I have a content type: Cart, which has a view, that accepts a request, and can effectively remold the Cart content type into a specific cart for a specific client. The client will after all need to manipulate the cart to add, delete, and edit items. On Jan 24, 2007, at 11:50 PM, Maciej Wisniowski wrote: Hi Two questions... Is this possible to get request object in content class. In Zope2 this was possible with simple self.REQUEST. In Zope3 I tried self.request but I only get errors. Maybe this is a feature, and I'm not supposed to access request object from content class? Another question. I'm trying to write tests for my content object. Because I want some caching facilities I'm using getLocationForCache from zope.app.cache.caching. and because of this: zapi.getPath(obj) In short it is like: class MyClass(Persistent): (...) def myfunction(self): location = zapi.getPath(self) return location In the tests I always get location == None. I'm using doctests like: test_content = MyClass() test_content.myfunction() placefulsetup adds some objects like root etc. but I'm not sure how I should add my object to this. Any clues? -- Maciej Wisniowski ___ 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
Re: [Zope3-Users] Access to request in content object and object path in doctests
InterfaceClass zope.traversing.interfaces.IPhysicallyLocatable) Ehm...? Ideas? OK, I forgot about: setup.setUpTraversal() Now it works with: from zope.app.folder import rootFolder from zope.traversing.api import getPath root = rootFolder() root['test_content'] = DBCrudContent() test_content = root['test_content'] getPath(root['test_content']) /test_content but unfortuantelly when my object is trying to get path to itself like: class DBCrudContent(): def myfunction(self): getPath(self) test_content.myfunction() I get error: File dbcrudbase.txt, line 86, in dbcrudbase.txt Failed example: test_content.myfunction() Exception raised: Traceback (most recent call last): File /home/downloads/Zope/Zope-3.3.0/build/lib.linux-i686-2.4/zope/testing/doctest.py, line 1256, in __run compileflags, 1) in test.globs File doctest dbcrudbase.txt[17], line 1, in ? test_content.myfunction() File doctest dbcrudbase.txt[7], line 18, in myfunction getPath(self) File /home/downloads/Zope/Zope-3.3.0/build/lib.linux-i686-2.4/zope/traversing/api.py, line 62, in getPath return IPhysicallyLocatable(obj).getPath() File /home/downloads/Zope/Zope-3.3.0/build/lib.linux-i686-2.4/zope/location/traversing.py, line 154, in getPath raise TypeError(Not enough context to determine location root) TypeError: Not enough context to determine location root -- Maciej Wisniowski ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Access to request in content object and object path in doctests
line 154, in getPath raise TypeError(Not enough context to determine location root) TypeError: Not enough context to determine location root I've added Contained as the base class of my content and it works now... uff... -- Maciej Wisniowski ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Access to request in content object and object path in doctests
On Wed, Jan 24, 2007 at 11:50:21PM +0100, Maciej Wisniowski wrote: Is this possible to get request object in content class. In Zope2 this was possible with simple self.REQUEST. In Zope3 I tried self.request but I only get errors. Maybe this is a feature, and I'm not supposed to access request object from content class? Yes. You're not supposed to do that. Views work with requests, not content objects. If you told us what you want to achieve, we could help you find a way to do it that works with Zope 3 rather than against it. Another question. I'm trying to write tests for my content object. Because I want some caching facilities I'm using getLocationForCache from zope.app.cache.caching. and because of this: zapi.getPath(obj) In short it is like: class MyClass(Persistent): (...) def myfunction(self): location = zapi.getPath(self) return location In the tests I always get location == None. I'm using doctests like: test_content = MyClass() test_content.myfunction() placefulsetup adds some objects like root etc. but I'm not sure how I should add my object to this. Any clues? Lately I've been using this pattern in my tests: #!/usr/bin/env python import unittest from zope.testing import doctest from zope.app.testing import setup from zope.app.folder import rootFolder from zope.traversing.api import getPath from mypackage import MyObject def doctest_something(): Bla bla bla root = rootFolder() root['my_object'] = my_object = MyObject() getPath(my_object) '/my_object' def setUp(test): setup.placelessSetUp() setup.setUpTraversal() def tearDown(test): setup.placelessTearDown() def test_suite(): return doctest.DocTestSuite(setUp=setUp, tearDown=tearDown) if __name__ == '__main__': unittest.main(defaultTest='test_suite')) I avoid setup.placefulSetUp, and I avoid zapi/ztapi. Cheers, Marius Gedminas -- System going down at 5 this afternoon to install scheduler bug. signature.asc Description: Digital signature ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
