December 2002 - Zope-Dev

Allowing only specific meta_types to be addable to my product
by Stacy Roberts Ladnier 19 Dec '02

19 Dec '02

I have created a Product made up of hundreds of classes. Each class has restrictions that should only allow a certain few meta_types to be added. I have tried every method I can find to do this, without luck. I know you can restrict this in a ZClass by defining the addable subobjects. However, I cannot determine how to do this in the python class. Only those meta_types allowed should appear in the Add Drop down list. Thanks in advance, Stacy

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validate method
by Mario Bianchi 18 Dec '02

18 Dec '02

Hello everybody, I want to write a custom UserFolder to allow for a certain type of authentication/validation. One straightforward way to do so is to inherit from UserFolder and override the validate method. Nevertheless, the validate method is documented in the code as PRIVATE object interface, which means -I guess- that is not part of the object API and no guarantee of compatibility with newer version is given. I noticed there's a securityManager.validate method that takes the same parameters as the UserFolder.validate one, but the former is part of the Zope API: should I use that one to implement validation for my user folder? If this is the case, how can I manage extending class UserFolder and using SecurityManager.validate as well? Thanks, Mario. _________________________________________________________________ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail

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cvs.zope.org upgraded
by Martijn Pieters 18 Dec '02

18 Dec '02

cvs.zope.org now runs on ViewCVS 0.9.2, and I enabled CVSGraph (watch out, big images!) and database query support. Head on over and play around with the new look and features! -- Martijn Pieters | Software Engineer mailto:mj@zope.com | Zope Corporation http://www.zope.com/ | Creators of Zope http://www.zope.org/ ---------------------------------------------

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cvs.zope.org broken
by Godefroid Chapelle 18 Dec '02

18 Dec '02

Hi all, Does someone knows what happens with cvs.zope.org which is currently broken ? Thanks -- Godefroid Chapelle BubbleNet sprl rue Victor Horta, 18 / 202 1348 Louvain-la-Neuve Belgium Tel + 32 (10) 459901 Mob + 32 (477) 363942 TVA 467 093 008 RC Niv 49849

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CRITICAL!!!! CVS: Zope/lib/python/OFS - Image.py:1.141.4.3
by Maik Jablonski 17 Dec '02

17 Dec '02

Hi, BIG PROBLEM WITH THIS CHECK-IN FROM YESTERDAY: I've updated my ZOPE and now all Images are broken!!! ZOPE lives behind a SQUID. I think that RESPONSE.setBase(None) is NOT a good idea at all!!! Commenting this out and all works as expected... Maybe someone else can check this issue... -mj Update of /cvs-repository/Zope/lib/python/OFS In directory cvs.zope.org:/tmp/cvs-serv2993/lib/python/OFS Modified Files: Tag: Zope-2_6-branch Image.py Log Message: Check in for #342 on behalf of slinkp === Zope/lib/python/OFS/Image.py 1.141.4.2 => 1.141.4.3 === --- Zope/lib/python/OFS/Image.py:1.141.4.2 Wed Nov 13 14:18:41 2002 +++ Zope/lib/python/OFS/Image.py Mon Dec 16 19:40:23 2002 @@ -133,6 +133,7 @@ Returns the contents of the file or image. Also, sets the Content-Type HTTP header to the objects content type. """ + # HTTP If-Modified-Since header handling. header=REQUEST.get_header('If-Modified-Since', None) if header is not None: @@ -374,7 +375,9 @@ self.ZCacheable_set(None) data=self.data - if type(data) is type(''): return data + if type(data) is type(''): + RESPONSE.setBase(None) + return data while data is not None: RESPONSE.write(data.data) _______________________________________________ Zope-Checkins maillist - Zope-Checkins(a)zope.org http://lists.zope.org/mailman/listinfo/zope-checkins

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dupe column names not supported (Shared.DC.ZRDB) ?
by Adam Manock 17 Dec '02

17 Dec '02

Hi there, I'm currently testing (documenting, building RPM packages for) the following configuration: RedHat 8.0 python 2.1.3 postgresql 7.3 mx 2.0.3 psycopg 1.1 Zope-2.6.1b1 Having just got all the packages built and installed, I thought I'd run the database adapter, Zope and postgres through their paces starting with the SQL examples at: http://www.postgresql.org/idocs/index.php?tutorial-sql.html I ran into trouble with: http://www.postgresql.org/idocs/index.php?tutorial-join.html specifically with: SELECT W1.city, W1.temp_lo AS low, W1.temp_hi AS high, W2.city, W2.temp_lo AS low, W2.temp_hi AS high FROM weather W1, weather W2 WHERE W1.temp_lo < W2.temp_lo AND W1.temp_hi > W2.temp_hi; Error, exceptions.ValueError: Duplicate column name, city Traceback (innermost last): Module ZPublisher.Publish, line 98, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Shared.DC.ZRDB.Connection, line 115, in manage_test Module Shared.DC.ZRDB.Results, line 52, in __init__ ValueError: Duplicate column name, city Obviously this will work if you change the query to: SELECT W1.city AS city1, W1.temp_lo AS low1, W1.temp_hi AS high1, W2.city AS city2, W2.temp_lo AS low2, W2.temp_hi AS high2 FROM weather W1, weather W2 WHERE W1.temp_lo < W2.temp_lo AND W1.temp_hi > W2.temp_hi; City1 Low1 High1 City2 Low2 High2 San Francisco 43 57 San Francisco 46 50 Hayward 37 54 San Francisco 46 50 I did a little digging to see if the above is valid SQL92 syntax, or just uses a PostgreSQL specific extension, the only things I found: In: http://www.postgresql.org/idocs/index.php?sql-select.html "In the SQL92 standard, the optional keyword AS is just noise and can be omitted without affecting the meaning. The PostgreSQL parser requires this keyword when renaming output columns because the type extensibility features lead to parsing ambiguities in this context. AS is optional in FROM items, however." And In: http://manuals.sybase.com/onlinebooks/group-as/asg1150e/mig_gde/@Generic__B… "Correlation Names ANSI requires correlation names on self-joins. The following query is now invalid: select columns from table1, table1 where clause ... This query must be rewritten as: select columns from table1 t1, table1 t2 where clause ..." Trying it without the "noise" in psql: testdb1=> SELECT W1.city, W1.temp_lo, W1.temp_hi, testdb1-> W2.city, W2.temp_lo, W2.temp_hi testdb1-> FROM weather W1, weather W2 testdb1-> WHERE W1.temp_lo < W2.temp_lo testdb1-> AND W1.temp_hi > W2.temp_hi; city | temp_lo | temp_hi | city | temp_lo | temp_hi ---------------+---------+---------+---------------+---------+--------- San Francisco | 43 | 57 | San Francisco | 46 | 50 Hayward | 37 | 54 | San Francisco | 46 | 50 (2 rows) testdb1=> The question: If the above example query is valid ANSI SQL92, do we aim to support it? Adam

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Bug Day Followup
by Casey Duncan 17 Dec '02

17 Dec '02

Just wanted to thank everyone for their participation on bug day and wanted to followup with a couple of reminders: 1. Make sure CHANGES.txt got updated on the 2.6 branch if you checked in a change. Its not too late to update it now. 2. Make sure bug fixes you made on the 2.6 branch get merged into the HEAD, otherwise they are likely to reappear in 2.7. Again thanks to everyone for a great bug day! -Casey

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PyCon DC 2003: Extension of Submission Deadline
by Guido van Rossum on behalf of Steve Holden 17 Dec '02

17 Dec '02

The deadline for submissions to PyCon DC 2003 appears to have been too tight for many authors. While some promised submissions have arrived, several have not even though the original deadline of 15 December has passed. Rather than exclude promising papers the organizing committee has decided to extend the deadline for submissions. Accordingly, the new schedule for proposals is as follows: Submission Deadline: January 15, 2003 Notification of Acceptance: January 31, 2003 Final Versions Due: March 10, 2003 Conference Dates: March 26-28, 2003 [unchanged] Authors who have already submitted abstracts are invited to resubmit if they feel that the original deadline had an adverse effect on the quality of their submissions. Please make any appropriate media, mailing lists and newsgroups aware of this announcement. Enquiries should be sent in the first instance to pycondc-2003(a)python.org. Information about PyCon DC 2003 is available at the following URLs: www.python.org/pycon www.python.org/cgi-bin/moinmoin/PyCon The latter URL, a Wiki page, can also be used to communicate with the conference organizers. This is *your* conference: tell us what *you* want to see in it. regards ----------------------------------------------------------------------- Steve Holden http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/pwp/ Bring your musical instrument to PyCon! http://www.python.org/pycon/ -----------------------------------------------------------------------

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Track modification
by Cornel Nitu 16 Dec '02

16 Dec '02

I want to track modifications of objects and I don't know when Zope changes the bobobase_modification_time. Is there a method I could overwrite for this? Thanks, Cornel

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Infuriating ZClass registry Heisenbug
by Evan Simpson 16 Dec '02

16 Dec '02

This past weekend I migrated a bunch of ZClasses and the web site that uses them from a scratch Zope instance into my production instance. Both run off the same 2.6 CVS branch checkout, connecting to ZEO servers running from the same ZEO trunk checkout. For a while after starting the server, everything works fine. After an unpredictable time period ranging from minutes to hours, suddenly my ZClass instances become broken, and I start seeing this in my log, over and over: 2002-12-10T11:33:18 ERROR(200) ZODB Couldn't load state for '\x00\x00\x00\x00\x00\x01\x1f\xc9' Traceback (innermost last): Module ZODB.Connection, line 533, in setstate ImportError: No module named */rJ6Q2CNqMJDSN4Okpwiuw== The object that fails to load state is a BTree Bucket belonging to the ZClass registry, and "/rJ6Q2CNqMJDSN4Okpwiuw==" is the GUID of one of my ZClasses. If I delete that ZClass, it complains about a different one. If I restart the server, everything works again, for a while, but I get the following in my log: 2002-12-10T11:36:49 INFO(0) ZCS:2443 Connected to storage ------ 2002-12-10T11:36:49 INFO(0) ZODB Opening database for mounting: '144865536_1012175858.273945' ------ 2002-12-10T11:36:49 INFO(0) ZODB Mounted database '144865536_1012175858.273945' at /temp_folder ------ 2002-12-10T11:36:50 ERROR(200) ZODB Couldn't load state for '\x00\x00\x00\x00\x00\x01\x1f\xc9' Traceback (innermost last): Module ZODB.Connection, line 533, in setstate ImportError: No module named */rJ6Q2CNqMJDSN4Okpwiuw== ------ 2002-12-10T11:36:50 ERROR(200) Zope A problem was found when checking the global product registry. This is probably due to a Product being uninstalled or renamed. The traceback follows. Traceback (innermost last): Module OFS.Application, line 218, in checkGlobalRegistry Module ZODB.Connection, line 533, in setstate ImportError: No module named */rJ6Q2CNqMJDSN4Okpwiuw== ------ 2002-12-10T11:36:50 INFO(0) Zope Beginning attempt to rebuild the global ZClass registry. ------ 2002-12-10T11:36:52 INFO(0) Zope The global ZClass registry has successfully been rebuilt. ------ 2002-12-10T11:36:52 INFO(0) ZServer HTTP server started at Tue Dec 10 11:36:52 2002 Hostname: server1.shackworks.com Port: 8280 Help!

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