July 2003 - Zope-Dev

Problem with Zope 2.7.0-b1
by Jean Baltus 25 Jul '03

25 Jul '03

Hi all, The problem I describe here does NOT appear with Zope 2.6.1, nor Zope 2.6.2b4, only with Zope 2.7.. I installed Zope 2.7 with CMF 1.4, Plone 1.1alpha2 and TranslationService 0.4. When I create a Plone site (called dice here) I've got the following error: AssertionError Sorry, a site error occurred. Traceback (innermost last): * Module ZPublisher.Publish, line 161, in publish_module * Module Products.Localizer, line 58, in new_publish * Module ZPublisher.Publish, line 125, in publish * Module Zope.App.startup, line 202, in zpublisher_exception_hook * Module ZPublisher.Publish, line 98, in publish * Module ZPublisher.mapply, line 88, in mapply * Module ZPublisher.Publish, line 39, in call_object * Module Products.CMFCore.PortalContent, line 116, in __call__ * Module Shared.DC.Scripts.Bindings, line 252, in __call__ * Module Shared.DC.Scripts.Bindings, line 283, in _bindAndExec * Module Products.CMFCore.FSPageTemplate, line 189, in _exec * Module Products.CMFCore.FSPageTemplate, line 122, in pt_render * Module Products.PageTemplates.PageTemplate, line 95, in pt_render <FSPageTemplate at /dice/document_view used for /dice/index_html * Module TAL.TALInterpreter, line 200, in __call__ * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 672, in do_useMacro * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 409, in do_optTag_tal * Module TAL.TALInterpreter, line 394, in do_optTag * Module TAL.TALInterpreter, line 389, in no_tag * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 672, in do_useMacro * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 614, in do_loop_tal * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 407, in do_optTag_tal * Module TAL.TALInterpreter, line 389, in no_tag * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 562, in do_insertTranslation AssertionError: (60, 12) (Also, an error occurred while attempting to render the standard error message.) The behavior is the same with Linux and Windows platform. If you remove translation service, the error disappears (but it used to work with older Zope version. that's why I think the problem is in Zope 2.7). Any idea? Regards, -- Jean

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Re: segfaults in cPersistence under 2.6
by Anthony Baxter 25 Jul '03

25 Jul '03

*sigh* So I tried a fresh checkout on a different box, no crash. Completely nuked old checkout (which was a new checkout last night), checked out again, rebuilt, no crash. Beats me. I'm going to blame the electrician who took out power to our floor this morning, because it's that or cosmic rays. -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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Zope 2.7 from cvs and internationalization issues
by Eugene Morozov 23 Jul '03

23 Jul '03

Hello! I've found today that it is simply impossible to use cyrillic characters in ZMI in the latest zope from cvs. If I don't have management_page_charset set on root folder and try to enter cyrillic title for some folder, I get following error: Error Type: UnicodeError Error Value: Latin-1 encoding error: ordinal not in range(256) If I set management_page_charset=koi8-r for the root folder and then try to set cyrillic title for some folder, I get the following error: Error Type: UnicodeError Error Value: UTF-8 decoding error: invalid data If I set management_page_charset=utf-8 for the root folder and then try to set cyrillic title for some folder, I get the following error: Error Type: UnicodeError Error Value: Latin-1 encoding error: ordinal not in range(256) Folders with Russian titles that were created in previous version of Zope show correct title in the ZMI, but it is impossible to change it because form for changing properties is inaccessible (it also gives UnicodeError because it tries to encode unicode string, which by the way contains cyrillic characters encoded in koi8-r, not unicode, in koi8-r). I was able to investigate last issue because entry in error log appears and I was able to insert debugging print statments in Zope code and see that it somehow manages to store koi8-r characters in unicode object and then tries to assume that it is really unicode object and apply conversion from unicode to koi8-r. Please, help me, I don't want to install older version of Zope now. Sorry if my English is not good enough to correctly describe the problem, but every non-english speaking subscriber may install zope 2.7 from cvs and see that it doesn't handle languages with encodings other than latin-1.

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How to use dtml-sqltest tag in zsql method?
by Anitha George 23 Jul '03

23 Jul '03

Hi Someone please help me out with this: I am passing a string in this format (215,216) from the python script to the Zsql method. The SQl query should have the following form: select * from employees where id in (215,216) but is as follows: select * from employees where id in '(215,216)' which does not give the required result.The id is of data type string/nb. It doesnt accept integer values. A sample usage is given in the Zope documentation **************************************** select * from employees <dtml-sqlgroup where> <dtml-sqltest salary op="gt" type="float" optional> <dtml-and> <dtml-sqltest first type="nb" multiple optional> <dtml-and> <dtml-sqltest last type="nb" multiple optional> </dtml-sqlgroup> If first=Bob and last=Smith, McDonald it renders: select * from employees where (first='Bob' and last in ('Smith', 'McDonald') ) *****************************************8 But it is not working when I tried it. I get the following result select * from employees where (first='Bob' and last = 'Smith,McDonald' ) Please help me out!!Is there any other type for declaring the database fields other than int,float,string and nb.I am using Zope version 2.5.1 . The documentation covers Zope 2.5. Thanks Anitha _________________________________________________________________ Tired of spam? Get advanced junk mail protection with MSN 8. http://join.msn.com/?page=features/junkmail

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usage of dtml-sqltest tag in Zsql method
by Anitha George 23 Jul '03

23 Jul '03

Hi Someone please help me out with this: I am passing a string in this format (215,216) from the python script to the Zsql method. The SQl query should have the following form: select * from employees where id in (215,216) but is as follows: select * from employees where id in '(215,216)' which does not give the required result.The id is of data type string/nb. It doesnt accept integer values. A sample usage is given in the Zope documentation **************************************** select * from employees <dtml-sqlgroup where> <dtml-sqltest salary op="gt" type="float" optional> <dtml-and> <dtml-sqltest first type="nb" multiple optional> <dtml-and> <dtml-sqltest last type="nb" multiple optional> </dtml-sqlgroup> If first=Bob and last=Smith, McDonald it renders: select * from employees where (first='Bob' and last in ('Smith', 'McDonald') ) *****************************************8 But it is not working when I tried it. I get the following result select * from employees where (first='Bob' and last = 'Smith,McDonald' ) Please help me out!!Is there any other type for declaring the database fields other than int,float,string and nb.I am using Zope version 2.5.1 . The documentation covers Zope 2.5. Thanks Anitha _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

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PythonScript execution
by Hubert Muller 22 Jul '03

22 Jul '03

Wyciśnięte cytrusyHello, We have built a Zope/CMF/Plone site. The site contains a flash movie which is responsible for generating an animated menu. The menu utilizes PythonScript which goes through Folder objects, gets its names and produces XML with a drawers structure. I'm sure that python script does everything well (no unneccesary loop runs, etc.) when I am accessing it from the web browser - the script outputs xml very quickly (<0.05 sec). When I access the site from the browser (internetExplorer), the first 10 elements of site transfer quickly. When the flash movie loads it requests python script for XML. Then the browser (attention! BROWSER not flash object) waits for about 4-5 seconds. When the XML reaches Flash, the browser attempts to load the remaining elements of site. I repeat this with Opera and the site loads significantly smoother, without significant troubles. I notice that the flash movie this time loads at the end of the requests queue. (Probably Opera applies longer intervals between requests). The site includes 20 graphics objects (60KB total). Is it possible that Zope has troubles handling 30 requests when the server configuration is IntelXeon2.4GHz - 512MB? Is there any performance issue with PythonScript execution during handling many requests? How can this issue be prevented? Thanks in advance, Hubert Muller

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Can't fathom 'method-populated' selection lists in Zclasses
by Bob Marshall 22 Jul '03

22 Jul '03

Hi Folks, I'm having a little issue with selection-type values in ZClass property sheets (I'm using Zope 2.7 but have the same issue under 2.6) What I'm trying to achieve is this: All the documentation I've read says that the 'selection' type for a property of a ZClass property sheet can be a variable *or a method*. Fine. This works as advertised, except where the method is a method *defined within the Zclass* (e.g. as MyZClass.propertysheets.methods.myMethod ). Is this a known bug? A feature? Do I need some arcane Zope Zen syntax to unlock this behaviour? N.B. If the method resides *outside* the ZClass (e.g. as a python script in the root folder) all things works just fine. The only 'diagnostic' I get is on the property sheet containing the selection type property: it displays e.g. 'No value for myMethod' instead of the expected drop-down box. Any help most appreciated. Cheers Bob

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don't forget to install new modules
by Jamie Heilman 21 Jul '03

21 Jul '03

The DBTab merge to HEAD didn't include any updates to the setup stuff, hence it doesn't get installed, which kinda breaks everything if you aren't running out of the in-place source tree. Also adding <import package="Products.TemporaryFolder"/> to the zopeschema made zopectl blow-up. Dunno what the goal of that was. -- Jamie Heilman http://audible.transient.net/~jamie/ "...thats the metaphorical equivalent of flopping your wedding tackle into a lion's mouth and flicking his lovespuds with a wet towel, pure insanity..." -Rimmer

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registerClass ignoring permissions defined in the class?
by Jean Jordaan 18 Jul '03

18 Jul '03

Hi all For the second time in a couple of months, I found myself wrestling with security on FSPythonScripts (and eventually thinking hell with it, and just moving the functionality to a class method). Anyway, I found this, which looks like an inconsistency between docs and implementation: In ProductContext.registerClass the docstring says: permissions -- Additional permissions to be registered If not provided, then permissions defined in the class will be registered. However, registerClass only handles permissions that are passed in: if permissions: It doesn't look at permissions defined in the class at all. Am I missing something? The reason I thought this matters is that this works fine in a CMF .metadata file: """ [security] View=1:Anonymous """ but this doesn't: """ [security] Use LDAPService=1:Anonymous """ AccessControl.Role.manage_permission complains: "Invalid Permission: The permission <em>Use LDAPService</em> is invalid." The permission does, however, show up on the ZMI security tab, and if I set it for Anonymous on a parent of the script, the script executes fine. -- Jean Jordaan http://www.upfrontsystems.co.za

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Untrusted developers
by Brian Brinegar 18 Jul '03

18 Jul '03

Howdy, I work with a Zope deployment at a University. Each school has a folder within the Zope deploy where they have complete control. We allow each student, staff, and faculty member to have their own personal folder. One of the problems with this is that users can write a script which loops indefinitely. When a script gets stuck in a loop it bogs down the ZEO client running it until the system kills that python process. Usually this is because someone is developing something new, when it doesn't work they make a change and try it again. Eventually all of the ZEO Clients are hung and everything is slow (and Zope looks bad to the bosses because this didn't happen with apache.) What I would like to see is a timeout associated with code objects (Python Scripts, Page Templates) that is set to some small value like 10 seconds by default. If the script does not complete within the timeout Zope would raise an exception. The user could bump up the timeout if they are writing something time intensive on purpose, but they wouldn't kill the whole web server (and important web pages) during development. Has anything like this been considered previously? Is it something that would ever make it into a zope release if I was to work on a patch? Thank you, Brian Brinegar Engineering Computer Network Purdue University

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