January 2000 - Zope-Dev

Re: [Zope-dev] Zope Futures discussion: your input
by Anthony Baxter 22 Jan '00

22 Jan '00

>>> Chris McDonough wrote ^^^^^^^^^^^^^^^^ > > Talking about external methods I have a little problem with them: every > > time a method outputs to stdout zope bombs and you have to restart it. > > So we have to put try/except clauses around anything when an exception > > logged somewere would be much better in debugging the method. It is a > > problem of my installation, a known one or a feature? > > I don't think it's a known issue (at least by me)... can you reliably > reproduce it? Make sure you redirect stdout and stderr if you're running from, e.g. /etc/rc.d python z2.py > var/zope.stdout 2> var/zope.stderr Otherwise, on some systems, you will get a bomb either a) as soon as you write to stdout b) as soon as you fill whatever your stdio buffer size is, and it tries to flush. Anthony

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Distribution panel
by Tres Seaver 21 Jan '00

21 Jan '00

I noted your lament that no one seemed to know of the Distribution Panel in the standard Product. I had looked at it, but couldn't remember why I hadn't liked it -- I think it is that it is a "binary" distribution, while I expect most of my Products may need tailoring after installation. ExternalMethods, for instance, are shipped along only in pickled format -- their Python modules aren't in the lib/python/Products/FooProduct/Extensions directory. Perhaps it could be extended to allow inclusion of selected files from the Product tree? Best, Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: Zope Futures discussion: ZCatalog Query Facility?
by Butch Landingin 21 Jan '00

21 Jan '00

brian lloyd <brian(a)digicool.com> wrote: original article:http://www.egroups.com/group/zope/?start=21460 > Hi all, > > I will be giving a talk at the Zope Track at IPC8 on the > future directions of Zope. The format will be about half > me babbling about our broad future plans and half Q & A. <snip> Since you asked ;^), Now that a lot of people are starting to use ZCatalog for retrieving data inside the ZODB, does DC have plans for enhancing ZCatalog with a full-functioned Query engine? Something like "OQL" or SQL3 (i.e. a "standard" query language with support for OODBMS) querying facility? IMHO, this will make the Zope/ZODB a real contender as full-featured OODBMS (along with support for transactions & CORBA support (IIRC, someone has started working with an ILU/Fnorb interface to Zope?)) If only from the *marketing* viewpoint, having a free, robust, and OpenSource OODBMS with support for transactions, CORBA, and OQL/SQL3 querying facility is a *kick-ass* application that even *commercial* (i.e. proprietary) OODBMS would find hard to match! Ideally this Querying facility could do something like : Query --> [QueryParser] --> [QueryOptimizer] ---> [QueryRuntimeEngine] --> ResultSet where the QueryParser translates a SQL3 or OQL query into a set of ZCatalog query atoms (i.e it translates the query into a series of ZCatalog method calls), then the QueryOptimizer (using some set of optimizing transformations & maybe even use data metrics) optimizes the query. Then something like a QueryManager can either store this "optimized" query or call on the QueryRuntimeEngine to execute it and return a Result set. By storing the "optimized" query (something like DB2's statically-bound queries) and just executing them at runtime, we don't incur the overhead of running the parser and optimizer each time we execute the query -- although we could also forgo the storage and just invoke the querying facility "dynamically" where all the processes (parsing, optimization, and execution) are done in sequence(with the intermediate products discarded) -- this is useful for "adhoc" type of queries... I know this will require a *BIG* effort... and the DC folks might not just consider it a priority right now... but could DC or at least the Zope Community consider it and give it a thought now and then? Regards, Butch P.S. I hope all the Zope presentors at IPC8 post an article or even a short update on papers/talks presented at the ZopeTrack so that those of us who can't make it would at least get a feel for whats going on there... __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

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CopySupport.py patch
by zope-dev＠pi.slcc.edu 21 Jan '00

21 Jan '00

I am creating a product and have a special situation where a certain object must not be pasted in certain places on the Zope hierarchy. The CopySource class in OFS/CopySupport.py provides a _notifyOfCopyTo mechanism but the mechanism isn't fully supported in the CopyContainer class. Please use the following patch which corrects the problem. I have simply copied the _notifyOfCopyTo call from another part of the file. This is derived from the Zope 2.1.1 sources, but hopefully the development version hasn't changed a lot. Shane Hathaway diff -Naur CopySupport.py.orig CopySupport.py --- CopySupport.py.orig Fri Jan 21 13:01:00 2000 +++ CopySupport.py Fri Jan 21 13:04:25 2000 @@ -203,7 +203,14 @@ # Copy operation for ob in oblist: if not ob.cb_isCopyable(): - raise CopyError, eNotSupported % absattr(ob.id) + raise CopyError, eNotSupported % absattr(ob.id) + try: + ob._notifyOfCopyTo(self, 0) + except: + raise CopyError, MessageDialog( + title='Paste Error', + message=sys.exc_value, + action ='manage_main') ob=ob._getCopy(self) ob.manage_afterClone(ob) id=self._get_id(absattr(ob.id))

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RE: Problem of compile ZMySQLDA.!
by Joachim Schmitz 21 Jan '00

21 Jan '00

Hi I just had the same problem, aparently the mysql.h was changed between MySQL V 3.22-22 and 3.22-30. If you remove the "&" in the lines 384,1125 and 1147 it compiles fine on RedHat 6.1. Victor.Zhai wrote: >When I compile the ZMySqlDa in Proucts/Mysql/src/. >....... >gcc -fPIC -I/home/zgx/mysql/include/mysql -I/usr/local/mysql/include >-I/usr/include/mysql -g -O2 -I/usr/include/python1.5 >-I/usr/include/python1.5 >-DHAVE_CONFIG_H -c ./MySQLmodule.c >./MySQLmodule.c: In function `pythonify_row': >./MySQLmodule.c:238: warning: assignment from incompatible pointer type >./MySQLmodule.c: In function `pythonify_res_fields': >./MySQLmodule.c:384: invalid lvalue in unary `&' >./MySQLmodule.c: In function `STH_fetchdict': >./MySQLmodule.c:1125: invalid lvalue in unary `&' >./MySQLmodule.c:1147: invalid lvalue in unary `&' >make: *** [MySQLmodule.o] Error 1 > > >What is the problem? >Thanks a lot! Mit freundlichen Grüßen Joachim Schmitz WWW-Consultant email: js(a)ac-copy.net tel: +49-241-89491-0 fax: +49-241-89491-29

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RE: [Zope-dev] LICENSE.txt: license has been certified as Open So urce(tm)?
by Michel Pelletier 21 Jan '00

21 Jan '00

> -----Original Message----- > From: Holger Blasum [mailto:holger@avendo.de] > Sent: Friday, January 21, 2000 5:58 AM > To: zope-dev(a)zope.org > Subject: [Zope-dev] LICENSE.txt: license has been certified as Open > Source(tm)? > > > Hi, > > zope is exciting. Closely before becoming too enamoured, let me ask > a newbie question (possibly FAQ) for clarification on this (obvious) > snippet... > > LICENSE.txt > > >Zope Public License (ZPL) Version 1.0 > >------------------------------------- > > > >Copyright (c) Digital Creations. All rights reserved. > > > >This license has been certified as Open Source(tm). > > (tm) - Uhh, well Open Source is not a trademark: You're right. > "``Open Source'' is not and cannot become a trademark." > Eric S. Raymond, President, President Board of Directors, OSI > (OSI had previously applied for it) 16 June 1999 > (http://www.opensource.org/press_releases/certified-open-source.html) > > But maybe this when LICENSE.txt was written in the dark ages where OSI > still applied for that trademark, so perhaps it was intended to mean > "certified by OSI" ? The license was written in Jan/Feb of 1999, a few months before it was determined that it was not a tm. > Or whom or what has been the certifier mentioned in the > license (I feel > not sure whether par. 5 would pass very strict criteria, but on the > other hand par. 7 alleviates it) ? Bruce Perens (the other half of OSI) was our 'certifier'. Our license should be corrected. -Michel

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RE: [Zope-dev] tree tag _extraordinary_ namespace ugliness.
by Michel Pelletier 21 Jan '00

21 Jan '00

Good research folks, sounds to me like an extra namespace is being pushed onto itself like you conjecture. I'll talk to Jim about it and we should fix it soon. -Michel > -----Original Message----- > From: Benno Rice [mailto:benno@netizen.com.au] > Sent: Thursday, January 20, 2000 9:27 PM > To: Anthony Baxter > Cc: zope-dev(a)zope.org; jim(a)digicool.com > Subject: Re: [Zope-dev] tree tag _extraordinary_ namespace ugliness. > > > (Sorry about sending this multiple times. I goofed.) > > On Wed, Jan 19, 2000 at 01:41:14PM +1100, Anthony Baxter wrote: > > Ok, this is making my brain hurt. > > > > Say I have something like the following: > > > > <dtml-let id="top"> > > <dtml-tree id=id branches_expr="somefunc(parent_id=id)"> > > foo foo foo. > > </dtml-tree> > > </dtml-let> > > [snip of the rest of problem desc and tentative fix.] > > Works for me. I was trying to to a <dtml-tree> within a <dtml-in> and > was seeing pretty much the same namespace weirdness. All > fixed by applying > the following diff to lib/python/TreeDisplay/TreeTag.py in > Zope 2.1.2 on > FreeBSD/i386 4.0-CURRENT. > > *** TreeTag.py.old Fri Jan 21 13:22:48 2000 > --- TreeTag.py Fri Jan 21 13:22:57 2000 > *************** > *** 238,249 **** > 'tree-colspan': colspan, > 'tree-state': state } > > - md._push(InstanceDict(self, md)) > md._push(treeData) > > try: > tpRenderTABLE(self,id,root,url,state,substate,diff,data,colspan, > section,md,treeData, level, args) > ! finally: md._pop(2) > > if state is substate and not (args.has_key('single') > and args['single']): > state=state or ([id],) > --- 238,248 ---- > 'tree-colspan': colspan, > 'tree-state': state } > > md._push(treeData) > > try: > tpRenderTABLE(self,id,root,url,state,substate,diff,data,colspan, > section,md,treeData, level, args) > ! finally: md._pop(1) > > if state is substate and not (args.has_key('single') > and args['single']): > state=state or ([id],) > > -- > Benno Rice "No, no. > We're *sweet* and > XNFP Aries Dark Subculture- *innocent* > evil bastards." > friendly Internet Geek > benno(a)netizen.com.au > "Defend your joy" > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope ) >

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LICENSE.txt: license has been certified as Open Source(tm)?
by Holger Blasum 21 Jan '00

21 Jan '00

Hi, zope is exciting. Closely before becoming too enamoured, let me ask a newbie question (possibly FAQ) for clarification on this (obvious) snippet... LICENSE.txt >Zope Public License (ZPL) Version 1.0 >------------------------------------- > >Copyright (c) Digital Creations. All rights reserved. > >This license has been certified as Open Source(tm). (tm) - Uhh, well Open Source is not a trademark: "``Open Source'' is not and cannot become a trademark." Eric S. Raymond, President, President Board of Directors, OSI (OSI had previously applied for it) 16 June 1999 (http://www.opensource.org/press_releases/certified-open-source.html) But maybe this when LICENSE.txt was written in the dark ages where OSI still applied for that trademark, so perhaps it was intended to mean "certified by OSI" ? Or whom or what has been the certifier mentioned in the license (I feel not sure whether par. 5 would pass very strict criteria, but on the other hand par. 7 alleviates it) ? Again let me emphasize that I think Digital Creations is doing a really cool job; this is not necessarily political overcorrectness (but might be of some importance for the marketing guys if we go for it), just being curious, ;-) -- Holger Blasum 80336 Muenchen, Germany

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how to determine if an object is put at top level?
by Ava 21 Jan '00

21 Jan '00

Hello, I want to determine if an object has been *created* either in the toplevel or lower in the hierarchy. How can I do this *reliably* ? I found this code in Zope: def isTop(self): try: return self.aq_parent.aq_base.isTopLevelPrincipiaApplicationObject except: return 0 This *doesn't* work if the object is acquired. e.g. if the object's id is my_ob in the top level: when browsing http://server/my_ob, my_ob notice that it is at top level when browsing http://server/subfolder/my_ob, my_ob *does not* notice that it is at top level with the above code. How can I make this work? My product dynamically create content based on the fact that it either at the top level or not. When the product is created, the url is http://server/manage_addProduct/myproduct, and then it is *not* at the top level from the product's point of view. However, the parameters to initialize the product are dependent on whether it is at the toplevel or not. Thanks for any input. Please write to me directly to minf7(a)educ.univ-reunion.fr (I'm not on the list) Regards, Jephte CLAIN minf7(a)educ.univ-reunion.fr

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ZClasses: invalid id, but id doesn't exist
by Bill Anderson 21 Jan '00

21 Jan '00

OK, working on a new product, added a ZClass, inheriting from CatalogAware. Adding a propertysheet, no problem. Adding various properties .... all is fine until I try to add a property called 'summary'. There is no variation of it anyhwere within the product heirarchy (in fact, this is the first thing added!). I'ver even tried deleting the product and starting over. Nada. Any help greatly appreciated. Bill ANderson -- In flying I have learned that carelessness and overconfidence are usually far more dangerous than deliberately accepted risks. -- Wilbur Wright in a letter to his father, September 1900

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