September 2000 - Zope-Dev

ZPatterns transactions bug
by Steve Alexander 03 Sep '00

03 Sep '00

Here's a trace of all the transaction calls to do with a particular customizer. I have instrumented ZPatterns.Transactions.Transactional like this: def _register(self): if self.id=='customize_items': print "\n -- REGISTER %s" % self._v_registered if self._v_registered: return get_transaction().register(Reporter(self)) self._v_registered = 1 def _unregister(self): try: del self._v_registered if self.id=='customize_items': print "\n_unregister: NORMAL OPERATION" # import traceback # traceback.print_stack() except: print "\n\n_unregister: ERROR----" # import traceback # traceback.print_stack() ZPatterns.Transactions.Reporter in most of the methods. Specifically: def tpc_begin(self, transaction, subtransaction=None): if self.client.id=='customize_items': print '\n -- TPC begin %s sub=%s' % (self, subtransaction) self.tpc_entered = 1 Also: ZCatalog.py def catalog_object(self, obj, uid): """ wrapper around catalog """ self._v_total = (self._v_total + self._catalog.catalogObject(obj, uid, self.threshold)) if self.threshold is not None: if self._v_total > self.threshold: print ' -- ZCatalog commit subtransaction start' # commit a subtransaction get_transaction().commit(1) # kick the chache, this may be overkill but ya never know self._p_jar.cacheFullSweep(1) self._v_total = 0 print ' -- ZCatalog commit subtransaction complete' The trace starts when I try to update a ZCatalog containing lots of DataSkin-derived instances. -------- -- REGISTER 0 ... lots of REGISTER 1 -- REGISTER 1 -- ZCatalog commit subtransaction start -- TPC begin <Products.ZPatterns.Transactions.Reporter instance at 89600f8> sub=1 -- TPC commit <Products.ZPatterns.Transactions.Reporter instance at 89600f8> -- TPC finish <Products.ZPatterns.Transactions.Reporter instance at 89600f8> -- TPC end tran <Products.ZPatterns.Transactions.Reporter instance at 89600f8> _unregister: NORMAL OPERATION -- ZCatalog commit subtransaction complete -- REGISTER None -- REGISTER 1 -- TPC begin <Products.ZPatterns.Transactions.Reporter instance at 89f98b8> sub=1 -- TPC commit <Products.ZPatterns.Transactions.Reporter instance at 89f98b8> -- TPC finish <Products.ZPatterns.Transactions.Reporter instance at 89f98b8> -- TPC end tran <Products.ZPatterns.Transactions.Reporter instance at 89f98b8> _unregister: NORMAL OPERATION -- TPC commit_sub <Products.ZPatterns.Transactions.Reporter instance at 89600f8> -- TPC begin <Products.ZPatterns.Transactions.Reporter instance at 89600f8> sub=None -- TPC commit_sub <Products.ZPatterns.Transactions.Reporter instance at 89f98b8> -- TPC begin <Products.ZPatterns.Transactions.Reporter instance at 89f98b8> sub=None _unregister: ERROR, can't del self._v_registered -------- I don't know enough about ZODB transactions, and the intent of ZPatterns.Transactions to do anything more at present. I did note in ZODB/Transaction.py this comment. Perhaps it is relevant? # - For every jar for which we've called tpc_begin on, # we either call tpc_abort or tpc_finish. It is OK # to call these multiple times, as the storage is # required to ignore these calls if tpc_begin has not # been called. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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ZPatterns: transaction bug
by Steve Alexander 03 Sep '00

03 Sep '00

**Darn**; I pressed the send button on my mail client by accident while still working on this one. Ignore the last message. I think the error is to do with the way that ZPatterns.Transactions.Reporter doesn't do anything special for subtransactions. On committing a subtransaction, it commits the top-level transaction that it knows about. Then again, I'm new to the way ZODB handles transactions, so I might well be wrong here. More later... -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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(no subject)
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03 Sep '00

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Converters.field2date, allow empty string to return None?
by Brad Clements 02 Sep '00

02 Sep '00

One thing that has been bothering me is that I can't easily test my ZSQL Methods if they accept a date type unless I completely fill all the date arg types. For example, if the sqlmethod has argument type startdate:date='' and in the body I have <dtml-if startdate> ... When i use the test form, I can't leave the date field empty, otherwise I get a conversion error from Converters.field2date() I also have this problem with any form that has type date, if the end-user doesn't put a date in the form, I get a conversion error. Its okay with me to receive an empty string, which gets converted to None .. I just put NULL in the sql database. So .. what's the correct fix to allow empty fields to return either '' or None from field2date? I can alter Converters.py... I see that converters required: exists, but does that imply that all other converters allow an empty string to return None? Or do we need to add an explicit "optional" type? Either way, I'd like to fix this, but what's the best way? Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com AOL-IM: BKClements

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ANN: XMLToObjects proposal
by Chris McDonough 02 Sep '00

02 Sep '00

I've created a proposal to gather feedback for implementing a facility to transform arbitrary XML directly into arbitrary Python objects. It's at http://dev.zope.org/Wikis/DevSite/Proposals/XMLToObjects. Please comment on the Wiki discussion page associated with it.

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But I used __ac_permissions__! :S
by Chris Withers 01 Sep '00

01 Sep '00

Brian Lloyd wrote: > > Here's a quick thing to try- if 'subject' is an attribute > of your Article class, try adding: > > class Article(...): > subject__roles__=None > > then restart and see if you still get unauthorized... yup, I do :-( And besides, 'subject' is already in __ac_permissions__, as you can see: (a lot of stuff snipped out though ;-) __ac_permissions__ = ( ('View', ['subject','getThread'], ('Anonymous', 'Manager')), ) and I do appropriate Globals.default__class_init__'s... Man, I really have no idea, and not even any clue where to look. The big factor seems to be that 'subject' is a string. I had a similar problem with the SquishFile class with the 'icon' attribute. When it was a string: # protected by 'View' permission icon = 'misc_/Squishdot/squishfile_img' ...even though it was a class variable and protected in __ac_permissions__, I was getting very similar errors to the above... I was lucky, in that case, because it was a class variable, I could turn it into a method: # protected by 'View' permission def icon(self): return 'misc_/Squishdot/squishfile_img' ...and, lo and behold, no more security errors from there... :S Unfortunately, the string attributes in the Article class are instance attributes, not class attributes, so I can't do the same thing :-( Any ideas? cheers, Chris

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RE: [Zope] ZCatalog and OR searching
by Casey Duncan 01 Sep '00

01 Sep '00

It would be wonderful if ZCatalog could support something like a SQL where clause for doing complex searching. Is this anything anybody has in the works or would be interested in working on? I forsee something like Catalog(query_expr="title contains 'foo' and not title contains 'bar' or title contains 'spam'"). Support for the simple searching in existence now should of course remain. Perhaps some code could be borrowed from Gadfly or something. I would be interested in working on something such as this, but I don't want to reinvent the wheel. Anyone with futher input or info, please let me know. -Casey Duncan ----- Original Message ----- Date: Fri, 01 Sep 2000 11:43:30 +0100 From: Chris Withers <chrisw(a)nipltd.com> Organization: New Information Paradigms To: Dieter Maurer <dieter(a)handshake.de> CC: Francois-Regis CHALAOUX <Francois-Regis.CHALAOUX(a)sanofi-synthelabo.com>, Receipt Notification Requested <zope(a)zope.org> Subject: [Zope] ZCatalog and OR searching Dieter Maurer wrote: > A ZCatalog search usually combines searches to the different > indexes with an "And". > You want to combine them with an "Or". Don't you wish there was a decent query language for ZCatalog so this kindof rediculous complexiting to achieve a simple outcome wasn't necessary? cheers, Chris PS: The example in the Advanced ZCatalog How-To does away with most of the catalog's advantages (like lazy searches, small results set, etc)

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ZCatalog: text searches fail with sort_on + patch
by Steve Alexander 01 Sep '00

01 Sep '00

I'm getting an error in Catalog when I specify sort_on on a field-index, and also search on a text index. Zope 2.2.1, Python 1.5.2 Error Type: TypeError Error Value: loop over non-sequence Traceback (innermost last): File lib/python/ZPublisher/Publish.py, line 222, in publish_module File lib/python/ZPublisher/Publish.py, line 187, in publish File lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ProviderContainer) File lib/python/ZPublisher/Publish.py, line 171, in publish File lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: search) File lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: search) File lib/python/OFS/DTMLDocument.py, line 177, in __call__ (Object: search) File lib/python/DocumentTemplate/DT_String.py, line 528, in __call__ (Object: search) File lib/python/DocumentTemplate/DT_In.py, line 630, in renderwob (Object: SiteIndex) File lib/python/Products/ZCatalog/ZCatalog.py, line 463, in searchResults (Object: Traversable) File lib/python/Products/ZCatalog/Catalog.py, line 602, in searchResults File lib/python/Products/ZCatalog/Catalog.py, line 555, in _indexedSearch TypeError: (see above) This seems to be a simple type incompatibility error. Attached is a patch that fixes this. In Collector, http://classic.zope.org:8080/Collector/1586/view -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net *** Catalog.py.orig --- Catalog.py *************** *** 552,558 **** if intset: append((k,LazyMap(self.__getitem__, intset))) else: ! for r in rs: append((sort_index._unindex[r], LazyMap(self.__getitem__,[r]))) --- 552,558 ---- if intset: append((k,LazyMap(self.__getitem__, intset))) else: ! for r,x in rs.items(): append((sort_index._unindex[r], LazyMap(self.__getitem__,[r])))

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StructuredText.py - bug or feature
by nw_moriarty 01 Sep '00

01 Sep '00

I took an example of strucuture text from the document string of StructuredText.py - Text encloded by double quotes followed by a colon, a URL, and concluded by punctuation plus white space, *or* just white space, is treated as a hyper link. For example: "Zope":http://www.zope.org/ is ... Is interpreted as '<a href="http://www.zope.org/">Zope</a> is ....' Note: This works for relative as well as absolute URLs. The paragraph ends with a 'example' but the next line beging with "Zope" is not formatted as <PRE> but as a link. If one moves the 'For example:' in a new paragraph we have better results. Am I missing something? Nigel --== Sent via Deja.com http://www.deja.com/ ==-- Before you buy.

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_setObject error - urgent!
by Andy McKay 01 Sep '00

01 Sep '00

Hi, I think I have traced my error with cut and paste, I am getting an error on _setObject. If the object is not registered with Zope properly this will be a problem. Basic synopsis: Im importing an object from a script so Im getting a handle to the folder I would like the object to be in: this is obj. Then I call add and set object: obj._setObject(id, globals()[doctype](id, m)) This rather unusual syntax allows me to use a constructor for man different objects. The type is specified in 'doctype', I then get this error: 2000-08-31T16:56:57 PROBLEM(100) ASPNDoc Error: [exceptions.NameError: cat] Any ideas? Thanks in advance

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