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Re: [Zope-dev] I feel your Wiki Pain ;-)
by Simon Michael 22 Sep '00

22 Sep '00

I like where you're going with this Martijn. Spurred on by your concrete examples, how about this: every wiki page has an email address and functions as a "mailing list". Eg: I could subscribe or send edits to ZWikiWeb:FrontPageNews@joyful.com StructuredTextWiki:CurrentStatus@dev.zope.org ProposalsWiki(a)dev.zope.org (defaults to the front page) A zwikiweb could be seen as a hierarchy of very lightweight mail lists. When I subscribe to a page(list), I would also receive edits(mail) to its child pages(lists) by default. Implementation: a sufficiently smart mail server, or (better?) build on the "mail into zope" project for an all-zope solution. Eg: I might install and configure the "ZWikiMail" product, and suddenly my existing wikis are mail-enabled.. Comments ? -Simon

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Shared Libraries and Persistent Objects
by Monty Taylor 22 Sep '00

22 Sep '00

Hey guys, I've got a question about how Zope deals with shared libraries. Say I have a 2Meg shared library that I've generated with SWIG. (I know it's big, but for sake of argument) Say then that I create a Python Class that imports this library and provides a front-end for each of its exported methods. Then, I instantiate this class 2000 times within a Zope instance. My question is, the library code is loaded into memory once, right? That seems to be what should happen, but I want to make sure before I start selling people here on SWIGing a few utilities and bundling them into one of our Zope objects instead of doing fork/execs to call an executable. I'm not shifting the burden from loading time to storage size, am I? Thanks, Monty

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Chameleon
by Joachim Schmitz 22 Sep '00

22 Sep '00

Hi, I just tried to use the chameleon product with zope 2.2.1 under SuSE 7.0. After adding a new chameleon folder, I can't enter that folder, cause there is always the authorisation-box opened. And I am not able to authorize. Can the chameleon product work with 2.2.x at all ? Mit freundlichen Grüßen Joachim Schmitz AixtraWare, Ing. Büro für Internetanwendungen Hüsgenstr. 33a, D-52457 Aldenhoven Telefon: +49-2464-8851, FAX: +49-2464-905163

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Previous versions of persistent objects
by Robin Becker 22 Sep '00

22 Sep '00

Are there any methods to get access to previous versions of persistent objects without actually carrying out the undo? -- Robin Becker

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FTP behaviours
by Robin Becker 22 Sep '00

22 Sep '00

Has anyone done any work in the area of ftp controlled behaviours? I want to do something like check if an object is of a specific sort before overwriting/creating and then take some additional actions. -- Robin Becker

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Help - Unexpected context behaviour?
by Bernie Rossi 22 Sep '00

22 Sep '00

I am relatively new to Zope and Python and am trying to convert a Zope 'product' from version 2.1.4 (working okay) to 2.2.2 (the latest) and I'm having the following Zope Error when trying to publish the resource; Error Type: AttributeError Error Value: 'string' object has no attribute 'has_key' The code in question appears below (with non-important stuff taken out); Python code; def getContext(self): # return the list of parents up to the project level in reverse order . . . def getAbsoluteURL(self, REQUEST): """ Attempt to get the absolute URL of this object by building it manually""" print "Self : ", self.title print "Request : ", REQUEST . . . if REQUEST.has_key( 'URL1' ) : str = REQUEST['URL1'] . . . DTML Code; <dtml-in "getContext()"> <option value="<dtml-var expr="getAbsoluteURL(REQUEST)">/manage_container" <dtml-if expr="currId==getId()"> SELECTED </dtml-if> > . . . </option> </dtml-in> The function getContext does infact return a list of object instances (tested and okay) and also therefore the related REQUEST (I've assumed?). So that when we loop through the list (in the DTML), the 'context' of the 'current' object should change. Thus we can interrogate each instance and do whatever we want (certainly in previous versions of Zope). But what in fact I'm getting is the following (unexpected) debug information; Self : 'Object Name' Request : <Special Object Used to Force Acquisition> (and the Zope error as mentioned above) with the error line number pointing to the ' if REQUEST.has_key( 'URL1' ) :' statement. If I hack the code to avoid the above test (for the first instance only) the code works (?), in that the next item in the object list is processed correctly (only two objects in the list). So it appears that the REQUEST object (since it hasn't got a method 'has_key') is invalid for the parent object (which Zope thinks is a 'String' object rather than a REQUEST?) but okay for the other. I don't understand this behaviour, is this due to the changes in security implemented in the latest version or due to some other changes? Any help or advice would be appreciated. Regards Bernie Rossi.

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Question about Labels
by Andre Schubert 22 Sep '00

22 Sep '00

Hi, I have a Product with a Label called Foo. Now what can i do, that when anyone clicked on the tab Foo first the function bar() is called and after that the HTML-File is displayed. as manage_options =({'label':'Foo', 'action':'manage_propertiesForm'},) def bar(self): do anything before displaying the HTMLFile def manage_propertiesForm(self,REQUEST): """ doc string """ self.bar() return HTMLFile('edit_NetzwerkForm', globals())

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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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