September 2000 - Zope-Dev

Can't add Zclass
by mark＠dimensional.com 22 Sep '00

22 Sep '00

I'm running: Zope version: Zope 2.2.1 (source release, python 1.5.2, linux2) Python version: 1.5.2 Suddenly, I can't create a Zclass within any of my products. I go to Control_Panel/Products. Create a product test. Move into test. I try to Add a ZClass and get the following: ----------- Error Type: Could not load oid Error Value: None <!-- Traceback (innermost last): File /usr/lib/python1.5/site-packages/ZPublisher/Publish.py, line 222, in publish_module File /usr/lib/python1.5/site-packages/ZPublisher/Publish.py, line 187, in publish File /usr/share/zope/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File /usr/lib/python1.5/site-packages/ZPublisher/Publish.py, line 171, in publish File /usr/lib/python1.5/site-packages/ZPublisher/mapply.py, line 160, in mapply (Object: manage_addZClass) File /usr/lib/python1.5/site-packages/ZPublisher/Publish.py, line 112, in call_object (Object: manage_addZClass) File /usr/share/zope/lib/python/ZClasses/ZClass.py, line 154, in manage_addZClass (Object: Traversable) File /usr/share/zope/lib/python/OFS/ObjectManager.py, line 264, in _setObject (Object: Traversable) File /usr/share/zope/lib/python/ZClasses/ZClass.py, line 421, in manage_afterAdd (Object: fff) File /usr/share/zope/lib/python/ZClasses/ZClass.py, line 374, in _register (Object: fff) File /usr/share/zope/lib/python/ZODB/Connection.py, line 447, in setstate File /usr/share/zope/lib/python/ZODB/Connection.py, line 213, in _persistent_load (Info: \010Contentsq\021U\004helpq\022(U\004OFSPq\023U\032ObjectManager_Contents.stxq\024tq\025U\006actionq\026U\013manage_mainq\027u}q\030(h\020U\015Import/Exportq\031h\022(h\023U\037ObjectManager_Import-Export.stxq\032tq\033h\026U\027manage_importExportFormq\034utq\035U\022__ac_permissions__q\036((U\016Add zmarkTestsq\037)(U\007Managerq tq!tq"tq#U\006_p_oidq$U\010\000\000\000\000\000\000\025zq%U\011meta_typeq&U\011zmarkTestq\'U\012__module__q(U\031*Imn0C9EPqOhwmjIol0gNgQ==q)U\016propertysheetsq*U\010\000\000\000\000\000\000\025\177q+Qutq,t.N.')) Could not load oid > ------------ I seem to be able to add any other type of object. I was able to add ZClasses to my hearts content yesterday. I can't think of anything I've down between then and now that could cause this to happen. Any ideas? Thanks, Mark

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adding local roles to folders within a Product
by Steve Alexander 21 Sep '00

21 Sep '00

I have a ZClass-based product. The folder (should I be calling this an Application Object? :-) ) that contains all the product methods and objects that are accessible via the web has some local roles defined on it. I'm making a sort of Wizard to instantiate a new application instance. This happens by copying an empty application folder from within the ZClass product, to a chosen place in the standard part of the ZODB object heirarchy. I want to define the local roles on the "prototype" folder that is inside my Product. However, when I go to Control_Panel/Products/MyProduct/prototype/manage_access, I get the "map permissions to permissions" screen, rather than the "map permissions to roles, and define local roles" screen. Can I define local roles on my prototype folder -- perhaps using an external method, or DTML API calls to do it? Or, is there some reason that local roles don't make sense within products, and so I have to copy my prototype folder to elsewhere in the ZODB, and then set the local roles? -- Steve Alexander Software Enigineer Cat-Box limited http://www.cat-box.net

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Assigning Permissions To Roles
by Kevin Howe 21 Sep '00

21 Sep '00

I am having trouble getting Roles to work via my Python Product. Creating a local role works fine: self._addRole('myRole') But how do I tell the Role what permissions it has programmatically? After looking in Role.py, I tried the following: self.manage_role('myRole', ['View management screens, View']) but this kicks up an error. Am I calling this impoperly? kh

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[Fwd: __str__, DMTLFolder adn Squishdot]
by Chris Withers 21 Sep '00

21 Sep '00

Andy McKay wrote: > > > Andy McKay wrote: > > > I've given it a __call__ method, but not a __str__. Ive most problems > > > resolve around the objects name, absolute_url, __name__, so perhaps > fiddling > > > with __str__ might be an answer. > > > > Sorry, but none of that made sense... What are the actual problems > > you're having with names, absolute_url and __name__? > > This is probably not going to make much sense.... but you can create a > folderish DTML Document and on the surface it appears fine. However cracks > appear when you: > > - view it in a tree > - copy and paste > - catalog > > The reason being that the absolute_url of the object is wrong, it sometimes > comes out as http://fork:8080/a/b/c/ElementWithAttributes. In some cases > (cut and paste) __name__ is called, and that comes out wrong too. Now that is weird. Can anyone shed any light on what's going on here? > Ive given up on this now, I have an object and if I want some folderish > objects created tied to that object, I create a folder and do the storage in > that and it works fine. That's probably going to be your best bet in the long run, cheers, Chris

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Observable Interface?
by Chris Withers 21 Sep '00

21 Sep '00

Does anyone know what happened to it and how far its implementation got? cheers, Chris

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FYI: preliminary Zope 2.3 plan online...
by Brian Lloyd 21 Sep '00

21 Sep '00

Hi all - For those interested, I've finally gotten the current plan for the next planned Zope feature release online on dev.zope.org: http://dev.zope.org/Resources/zope_230_plan.html Note that there is no planned date at this point. If there is something that you think should be on there (AND you are willing to volunteer to lead it!), please let me know. Thanks! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Please help - Persistent dictionary keys
by John D. Heintz 21 Sep '00

21 Sep '00

Can someone please explain the best way for me to map from one instance to another? In the following code either: (1) I am using dictionaries wrong, or (2) I'm missing something with ExtensionClass in general. I have tried searching Zope and Python mailing lists and resources for an answer to this question but have become confused by different conflicting messages. On the one hand I have heard that dictionary keys are supposed to be immutable. On the other, I've heard that dictionaries are used to simulate (key is object, value is ignored) some aspects of sets. Which is correct? What I really want is to be able to map a Persistent object to a string with fast lookup. Thanks for any help. John Heintz import ZODB from Persistence import Persistent class Test1: pass class Test2(Persistent): pass dict = {} t1 = Test1() t2 = Test2() try: dict[t1] = 1 except: print "Using instance of Test1 as key failed!" try: dict[t2] = 2 except: print "Using instance of Test2(Persistent) as key failed!" -- John D. Heintz DataChannel, Inc. Senior Engineer 512-633-1198 jheintz(a)isogen.com

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using a DA
by Andre Schubert 21 Sep '00

21 Sep '00

Hi, i have a problem on using a DA in my Product. I have a Postgresql DA in my root-folder. If my Product is installed in the root-folder and i use: self.con_obj = DA.DA('id','','pgsql','',query) return self.con_obj() When i install my Product in a sub-folder of the root-folder and i call the function above the following error occurs. The database connection pgsql cannot be found. Who can help me, please Thanks as

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acl_users
by Bill Anderson 21 Sep '00

21 Sep '00

Potentially silly question: Any reason why a 'user folder' object has to be named 'acl_users'. -- E PLURIBUS LINUX

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Re: [Zope] Restricting URL access to objects that are not complete web pages
by Steve Alexander 21 Sep '00

21 Sep '00

Stephen Simmons wrote: > > My thoughts were to use an html_header that tracks how deeply components are > nested so that inner components turn off the page wrapper. This achieves 1 > and 2. This also achieves 3 if sections raise an exception if their page > wrapper is not turned off. You only want to see standard_html_footer and so forth when REQUEST.steps[-1]!=fragment_id, so it would not be accessible directly by URL. Try something like this for standard_html_footer: <dtml-if "REQUEST.steps[-1]=='standard_html_footer'"> <dtml-raise type="NotFound"></dtml-raise></dtml-if> </BODY></HTML> I think using siteaccess for this is more elegant, though. All the knowledge about what is allowed and what is not is maintained in one place, and the knowledge can be declared flexibly using regular expressions. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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