November 2001 - Zope-Dev

multiple cachemanagers for one object
by Subjectivize 04 Nov '01

04 Nov '01

I am developing an object that has need to caching different calculations using different policies. Some data is quite long term and some is quite short term. How can I associate more than one cache manager with my instantiated object? Has anyone done this? Also has anyone seen a persistent cache manager? One that would store data even when the server went down?

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Known as the Best Internet Based Business Opportunity
by wondermarket＠4newyork.com 03 Nov '01

03 Nov '01

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Zope BOF at Comdex in Vegas?
by Michael R. Bernstein 03 Nov '01

03 Nov '01

As the only (AFAICT) Zope user in Las Vegas, I'd like to propose that Zopistas that are here for Comdex (Nov 10th through 16th) get together for a Birds Of a Feather gathering. This could be a dinner or just meeting for drinks, depending on what people would like. How many people would be interested? Does anyone have a preferred time-frame? Here's hoping to meet some of you, Michael Bernstein.

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DocumentLibrary 1.0b3 / Zope 2.4.2 (newbie?) problem
by Kolb, Hap 02 Nov '01

02 Nov '01

Hi, any attempt to submit a document to my newly created document library under zope 2.4.2 yields the following error (traceback appended below): Error Type: NameError Error Value: global name 'ZopeTime' is not defined Now that's an error so basic that I suspect that it's me who is doing something wrong---if I only knew what...! Any help would be highly appreciated! Best, ...hap Traceback (innermost last): File /data1/software/Zope/zope-2.4.2/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /data1/software/Zope/zope-2.4.2/lib/python/ZPublisher/Publish.py, line 187, in publish File /data1/software/Zope/zope-2.4.2/lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: library) File /data1/software/Zope/zope-2.4.2/lib/python/ZPublisher/Publish.py, line 171, in publish File /data1/software/Zope/zope-2.4.2/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: document_submit) File /data1/software/Zope/zope-2.4.2/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: document_submit) File /data1/software/Zope/zope-2.4.2/lib/python/OFS/DTMLMethod.py, line 195, in __call__ (Object: document_submit) File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_String.py, line 546, in __call__ (Object: document_submit) File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_Try.py, line 212, in render File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_Try.py, line 221, in render_try_except File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_With.py, line 148, in render (Object: Documents) File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_With.py, line 133, in render (Object: addDocumentFile(REQUEST)) File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_Util.py, line 231, in eval (Object: addDocumentFile(REQUEST)) (Info: REQUEST) File <string>, line 2, in f File /data1/software/Zope/zope-2.4.2/Products/DocumentLibrary/DocumentStore.py, line 355, in addDocumentFile (Object: Documents) File /data1/software/Zope/zope-2.4.2/lib/python/OFS/ObjectManager.py, line 324, in _setObject (Object: Documents) File /data1/software/Zope/zope-2.4.2/lib/python/Products/ZCatalog/CatalogAwarenes s.py, line 114, in manage_afterAdd (Object: 1004694129.27) File /data1/software/Zope/zope-2.4.2/lib/python/Products/ZCatalog/CatalogAwarenes s.py, line 184, in index_object (Object: 1004694129.27) File /data1/software/Zope/zope-2.4.2/Products/DocumentLibrary/CatalogPlus.py, line 122, in catalog_object File /data1/software/Zope/zope-2.4.2/lib/python/Products/ZCatalog/Catalog.py, line 382, in catalogObject File /data1/software/Zope/zope-2.4.2/lib/python/Products/ZCatalog/Catalog.py, line 495, in recordify File /data1/software/Zope/zope-2.4.2/lib/python/OFS/DTMLMethod.py, line 188, in __call__ (Object: date) File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_String.py, line 546, in __call__ (Object: date) File /data1/software/Zope/zope-2.4.2/lib/python/DocumentTemplate/DT_Util.py, line 231, in eval (Object: ZopeTime().Date()) (Info: ZopeTime) File <string>, line 2, in f (Object: guarded_getattr) NameError: (see above)

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Re: [Zope-dev] User Folders and Zope security
by Stephan Richter 02 Nov '01

02 Nov '01

>We would like something in "Work" that says if the authenticated user is >staff they get the local role "Staff" The user would be defined in the >User Folder in the root. I think the problem is rather trivial. Since you wrote your own user folder it is so easy to add custom roles. Do you have the directory path? I guess so. So you should able to figure out whether a user is a member of a certain group by parsing the path. Then you create the roles based on the group behavior. All you gotta do now is to overwrite the API method getRoles(self) (in User) and add the new roles to the return list. This way it is always generated on the fly and if the user changes directories the roles will change as well. def getDirectoryRoles(self): """ """ # I assume the path looks like /something/Group/user and that the dir is saved in self.path group = string.split(self.path, '/')[-2] roles = (string.lower(group),) return roles def getRoles(self): """Return the list of roles assigned to a user.""" if self.name == 'Anonymous User': return tuple(self.roles)+self.getDirectoryRoles() else: return tuple(self.roles) + ('Authenticated',)+self.getDirectoryRoles() -- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management

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Zope 2.4.2 DTML Method Bug
by Casey Duncan 02 Nov '01

02 Nov '01

One of my products exposed a bug in the 2.4.2 version of DTMLMethod.py. It is minor and can be worked around, but I wanted to point it out: Line 203 of DTMLMethod.py now contains: del self.__dict__['validate'] which is part of a try...finally statement. It seems that the "validate" key is not always present in the object at that point, specifically if you recursively call an object in a different context then it was originally called. as in: <dtml-with name="something"> <dtml-return name="this"> </dtml-with> This piece of code resulted in a KeyError on "validate" in my product code, which had previously worked fine. Perhaps another try statement should be wrapped around this del statement? /---------------------------------------------------\ Casey Duncan, Sr. Web Developer National Legal Aid and Defender Association c.duncan(a)nlada.org \---------------------------------------------------/

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User Folders and Zope security
by brian.r.brinegar.1 02 Nov '01

02 Nov '01

We have a custom UserFolder that authenticates users agains a PH directory. This means that we have the same 30,000 or so users defined in all of our user folder instances. Seeing no reason to redefine users in multiple user folders we made a decission to place one user folder in the root of our system and then grant users local roles on an object by object basis. Everything works great! Problem: We would like to have some roles assigned dynamically based on user information. For example: A role called "Staff" if the PH directory has the user listed as staff. We would like to be able to do this on an object by object basis, but have the roles only exist for a single request. So we don't have to give 15,000 people a local role and then track who leaves and who gets hired. Example: Folder hierarchy: /Work We would like something in "Work" that says if the authenticated user is staff they get the local role "Staff" The user would be defined in the User Folder in the root. We're open to any solutions/comments. Thanks, --Brian Brinegar ECN Web Technician MSEE 104 A 494-3106 http://www.geeksoft.net/

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CoreSession Urgent !!!
by michael kobald 02 Nov '01

02 Nov '01

Hi, i am have a big Problem with CoreSession 0.9 (Zope 2.3.3 Win2000 Server). I have 2 Session Data Mangers (dieter and session_mgr). I i want call the getSessionData() of them both method in 1 Transaction. Via calling foo3 I get the error msgs below. I need to call both Data Mangers in 1 Transaction ! By the way: Zope 2.4.2 hangs for the rest of his live after the 2. calling of foo3 Please Help michael Code: def a(self): """khjkjh""" data = self.dieter.getSessionData() data.set('dfd', 'dsd') return None def b(self): """hjhjh""" data2 = self.session_mgr.getSessionData() return None def foo3(self, REQUEST): """hhjh""" #return "dgffdg" c = self.a() #get_transaction().commit(1) d= self.b() #data = self.session_mgr.getSessionData() return "huhuh" First Call Error Type: error Error Value: release unlocked lock Traceback (innermost last): File E:\Beehive\TeDeLine\lib\python\ZPublisher\Publish.py, line 223, in publish_module File E:\Beehive\TeDeLine\lib\python\ZPublisher\Publish.py, line 187, in publish File E:\Beehive\TeDeLine\lib\python\Zope\__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File E:\Beehive\TeDeLine\lib\python\ZPublisher\Publish.py, line 175, in publish File E:\Beehive\TeDeLine\lib\python\Zope\__init__.py, line 235, in commit File E:\Beehive\TeDeLine\lib\python\ZODB\Transaction.py, line 335, in commit File E:\Beehive\TeDeLine\lib\python\ZODB\Connection.py, line 657, in tpc_finish File E:\Beehive\TeDeLine\lib\python\ZODB\BaseStorage.py, line 219, in tpc_finish (Object: SessionStorage) error: (see above) Second Call: Error Type: TransactionErrorError Value: A serious error, which was probably a system error, occurred in a previous database transaction. This application may be in an invalid state and must be restarted before database updates can be allowed. Beware though that if the error was due to a serious system problem, such as a disk full condition, then the application may not come up until you deal with the system problem. See your application log for information on the error that lead to this problem.

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BTrees and Page Templates
by Christian Theune 02 Nov '01

02 Nov '01

Hi. Following bugs me: I have a list of BTrees (the list is generated bt the pkg_remotePackages) that store information about a software package. What i found is, that the btrees (presented in the loop by 'package') can't be accessed in the Page Templates. When using the python expression, AccessControl.ZopeGuards.guarded_getitem prevents the display, and when using the path traversal of the page templates i get a 'not' found, probably the same problem as the AccessControl in the python expression. Any Ideas (other than creating a list of dictionaries for temporarily use, which would not solve the problem itself ...)? --- Here the page template: <tbody> <tr tal:repeat="package here/pkg_remotePackages"> <td tal:content="python:package['type']"></td> <td tal:content="package/title"></td> <td tal:content="package/version"></td> <td tal:content="package/source"></td> <td><a tal:attributes="href python:request['URL1'] + '/pkg_downloadPkg?pkg_PID=' + package['PID']">download!</a></td> </tr> </tbody> Regards, Christian -- Christian Theune - ct(a)gocept.com gocept gmbh & co.kg - schalaunische strasse 6 - 06366 koethen/anhalt tel.+49 3496 3099112 - fax.+49 3496 3099118 mob. - 0178 48 33 981 reduce(lambda x,y:x+y,[chr(ord(x)^42) for x in 'zS^BED\nX_FOY\x0b'])

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WebDAV API
by Dethe Elza 02 Nov '01

02 Nov '01

Hi folks, Because many existing Windows programs understand FTP but not WebDAV, we're trying to create an alternative way to lock/unlock files when we FTP them. This could be a simple HTTP call (preferred) or XML-RPC. The documentation I've been able to dig up on Zope's DAV implementation isn't too clear on how to programmatically lock/unlock files. I can easily check if a file is locked using DTML Methods, but actually locking it has eluded me. Do I have to create a Lock object first? At first wl_lockItems, wl_lockTokens, and wl_getLock all looked like methods to create a lock, but they seem to be methods for retrieving existing locks, wl_setLock seems to be what I want but I don't see how to create a token or a lock item. Can I do this in a DTML Method? TIA --Dethe -- Dethe Elza (delza(a)burningtiger.com) Chief Mad Scientist Burning Tiger Technologies (http://burningtiger.com) Living Code Weblog (http://livingcode.ca)

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