February 2001 - Zope-Dev

Setting vars in expression eval() namespace
by Julio Maia 22 Feb '01

22 Feb '01

Hi, I'm trying to create a tag to evaluate the expression passed to it, adding in the expression eval namespace a variable that contains the result of dtml processing of the tag's block. For instance, the following construct: <dtml-bvar "foo(a=1)" var="block"> some text <dtml-var "1+2"> </dtml-bvar> would invoke the expression "foo(a=1)" with a variable named 'block' set to 'some text 3' in the expression's namespace (btw, is it possible to achieve this using regular dtml?). However, I couldn't find a way to set a variable in the namespace used in the evaluation of the expression. I've tried to insert an entry in the mappings passed to the expression eval() method as follows: def __init__(self, blocks): tname, args, section = blocks[0] self.section = section.blocks ... # code that sets self.blockvar as the "var" attribute # code that sets self.expr as the tag's expression def render(self, md): ... d[self.blockvar] = render_blocks(self.section,md) # process the dtml block d={}; md._push(d) e = Eval(self.expr, expr_globals).eval(md) return render_blocks([e],md) But this doesn't seem to do it. Any hints on how to make this work? Julio

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FTP error messages
by richard＠bizarsoftware.com.au 21 Feb '01

21 Feb '01

One of our developers just spent another annoying morning trying to figure why his FTP transfers to Zope were sometimes responding with "426 Error creating file." with no other information being supplied. I've now added the ability to set the message to be sent back to the FTP client on FTPResponse. The patch is attached. We'll be using it and I hope that it, or something similar, makes it into the 2.3.1. I'd also hope that the standard PUT methods in the Zope source would set the message to something useful. At the moment, we set the message to the type and value of any exception raised in the PUT method. Of course, if there's a "better" way to do this, please tell me. Richard -- Richard Jones richard(a)bizarsoftware.com.au Senior Software Developer, Bizar Software (www.bizarsoftware.com.au)

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Acquisition muddleness!
by richard＠bizarsoftware.com.au 21 Feb '01

21 Feb '01

Hi - let me preface this message by saying that I _thought_ I knew how acquisition worked, but now I'm starting to doubt. A simple enough scenario: Python 1.5.2 (#1, Sep 30 2000, 18:08:36) [GCC 2.95.3 19991030 (prerelease)] on linux-i386 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam >>> import ExtensionClass >>> import Acquisition >>> class A(ExtensionClass.Base): ... def foo(self): ... print repr(self), type(self) ... >>> class B(Acquisition.Implicit): ... pass ... >>> a=A() >>> print repr(a), type(a) <A instance at 80ec588> <extension class __main__.A at 80eb1e0> >>> a.b=B() >>> print repr(a.b), type(a.b) <B instance at 80dc9c0> <extension class Acquisition.ImplicitAcquirerWrapper at 401460e0> >>> a.b.foo() <A instance at 80ec588> <extension class __main__.A at 80eb1e0> Now, I would've expected to see a.b.foo() print out exactly the same information as repr(a.b), type(a.b). In fact, I even scrounged up the Acquisition doc (it really isn't that easy to find these days...) and I can quote from it in support of what I believe should be happening: ''' Acquisition and methods Python methods of objects that support acquisition can use acquired attributes as in the 'report' method of the first example above. When a Python method is called on an object that is wrapped by an acquisition wrapper, the wrapper is passed to the method as the first argument. This rule also applies to user-defined method types and to C methods defined in pure mix-in classes. ''' The middle sentence is the kicker. The behaviour in DTML is as I'd expect - I mean, standard_html_header still reports the correct title_or_id for me, so it must be working correctly. But using the same codebase to do the above interactive test, I run into problems... Please, how did I get myself in this muddle? Richard -- Richard Jones richard(a)bizarsoftware.com.au Senior Software Developer, Bizar Software (www.bizarsoftware.com.au)

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DTML Documents/Folders in ZClasses fail to access anything
by Itai Tavor 21 Feb '01

21 Feb '01

Hi, I got a ZClass 'Test', with a DTML Method 'view' containing <dtml-var id>, and a DTML Document 'view2' with the same line. instance/view works. instance/view2 returns (ZDebug output): Error type: Unauthorized Error value: The object /test/view2, which is contained in /test/view2, is marked as private. Traceback (innermost last): File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 187, in publish File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 171, in publish File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: view2) File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: view2) File /opt/Zope-2.3.0-linux2-x86/lib/python/OFS/DTMLDocument.py, line 189, in __call__ (Object: view2) File /opt/Zope/lib/python/Products/ZDebug/DTMLLocator.py, line 103, in __call__ (Object: view2) File /opt/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_String.py, line 538, in __call__ (Object: view2) File /opt/Zope/lib/python/Products/ZDebug/DTMLDebug.py, line 259, in debug_render_blocks File /opt/Zope/lib/python/Products/ZDebug/DTMLDebug.py, line 239, in debugException File /opt/Zope/lib/python/Products/ZDebug/DTMLDebug.py, line 256, in debug_render_blocks File /opt/Zope-2.3.0-linux2-x86/lib/python/OFS/DTMLMethod.py, line 261, in validate (Object: view2) File /opt/Zope-2.3.0-linux2-x86/lib/python/AccessControl/SecurityManager.py, line 144, in validate File /opt/Zope/lib/python/Products/ZDebug/DebugSecurityPolicy.py, line 304, in validate Unauthorized: (see above) The same happens if I place a copy of 'view' inside a Folder in the ZClass and call instance/folder/view, except that this time the Folder is flagged as the 'private' object. Why? What? Is this a bug? Or is it supposed to work this way and I just don't get it? Did I fall behind on my sheep sacrifices? Or was it changed to goats and I missed the memo? Environment: Zope 2.3.0, ZClass subclassing only ZObject, using stock acl_users and storing the instance in a standard Folder. -- -- Itai Tavor -- "Je sautille, donc je suis." -- itai(a)optusnet.com.au -- - Kermit the Frog -- -- -- -- "If you haven't got your health, you haven't got anything" --

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usability bug concerning database connections?
by Jim Penny 21 Feb '01

21 Feb '01

> regarding Zope 2.3.0: > I removed a database connection from a top level > (there is a second one). > All my ZSQL methods were connected to the first one. > The user interface now looks like if the second one is > connected (it is shown as Connection Id). This is confusing. > It would be better to have some indicator for the broken > status of the ZSQL methods. > Just a small bug report :-) > Jan Seconded, and it would be really nice to be able to search by connection ID! Then if you were changing DA's, you could find the ones that needed to be changed rather than waiting for breakage. Jim Penny

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Re: [Zope-dev] DTML Documents/Folders in ZClasses fail to access anything
by Dieter Maurer 21 Feb '01

21 Feb '01

Itai Tavor writes: > I got a ZClass 'Test', with a DTML Method 'view' containing <dtml-var > id>, and a DTML Document 'view2' with the same line. instance/view > works. instance/view2 returns (ZDebug output): > > Error type: Unauthorized > Error value: The object /test/view2, which is contained in > /test/view2, is marked as private. I would check the ZClass's "Access Contents Information" permission mapping. Dieter

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usability bug concerning database connections?
by Jan-Oliver Wagner 21 Feb '01

21 Feb '01

Hi, regarding Zope 2.3.0: I removed a database connection from a top level (there is a second one). All my ZSQL methods were connected to the first one. The user interface now looks like if the second one is connected (it is shown as Connection Id). This is confusing. It would be better to have some indicator for the broken status of the ZSQL methods. Just a small bug report :-) Jan -- Jan-Oliver Wagner http://intevation.de/~jan/ Intevation GmbH http://intevation.de/ FreeGIS http://freegis.org/

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Python Product as DataSkin
by Michael R. Bernstein 21 Feb '01

21 Feb '01

I have an existing Python Product that I would like to use as a DataSkin in a Rack. What do I need to change (import/subclass) in order to use it in this way? Thanks, Michael Bernstein.

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acquisition interfering with []?
by Karl Anderson 21 Feb '01

21 Feb '01

Hopefully this is enough context for this question. When I subclass Acquisition.Implicit or .Explicit, I find myself losing the foo["item"] and foo[slice:slice] syntax. __getslice__ and __getitem__ aren't affected. When I don't subclass Acquisition, the [] syntax works fine. I can get them back by explcitly redefining them __getslice__ and __getitem__ (even though those methods never had any problems), but is there a better way around this? I'm doing a lot of other craaazzy stuff with these classes, I may be causing this problem myself elsewhere. I'm not defining foo.__getslice__, rather I'm defining __getattr__ in a superclass, and returning the result of a call on a proxied object for attr names that match a list. But this does look like the [] syntax is running into the fact that you need to call inheritedAttribute rather than the superclass method directly, or something. Here's what I'm doing to make this work: class ManageableNodeList(ManageableWrapper, DOMProxy.NodeListProxy, Acquisition.Implicit): def __getslice__(self, i, j): return self.__getattr__("__getslice__")(i,j) def __getitem__(self, i): return self.__getattr__("__getitem__")(i) -- Karl Anderson karl(a)digicool.com

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ZPatterns goes crazy after ZClass change
by Itai Tavor 20 Feb '01

20 Feb '01

Hi, I have a Rack which uses ZClass Company for storage. I renamed Company to CompanyX and created a new Company ZClass, giving it the same methods, propertysheets and properties as CompanyX. When I tried to view editInstanceForm_html of an instance of this class, I got the method stored in CompanyX. So I deleted CompanyX from the control panel. I still got the CompanyX method. I used the Rack's Storage tab to select another ZClass. Still got the method from CompanyX. when I click Remove Orphaned Slots on this Rack, I get: AttributeError _setRack Traceback (innermost last): File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 187, in publish File /opt/Zope-2.3.0-linux2-x86/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ProviderContainer) File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 171, in publish File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_pack) File /opt/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_pack) File /opt/Zope/lib/python/Products/ZPatterns/Rack.py, line 418, in manage_pack (Object: ProviderContainer) File /opt/Zope/lib/python/Products/ZPatterns/Rack.py, line 59, in getItem (Object: ProviderContainer) File /opt/Zope/lib/python/Products/ZPatterns/Rack.py, line 114, in retrieveItem (Object: ProviderContainer) File /opt/Zope-2.3.0-linux2-x86/lib/python/OFS/Uninstalled.py, line 110, in __getattr__ (Object: broken) AttributeError: (see above) Any ideas how I can fix this without recreating the Rack and all my persistent data? -- -- Itai Tavor -- "Je sautille, donc je suis." -- itai(a)optusnet.com.au -- - Kermit the Frog -- -- -- -- "If you haven't got your health, you haven't got anything" --

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