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Accessing catalog objects
by Sebastian Sippl 23 Jul '02

23 Jul '02

On Tuesday 23 Jul 2002 10:20 am, Sebastian Sippl wrote: >> Hi, >> >> I've tried to select all entrys from a catalog by defining the date >> boundaries(Python script). >> Looks like this: >> >> id=context.getId() >> >> return context.cata( >> {'content' : id, >> 'date': [datestart, dateend], >> 'date_usage' : 'range:min:max', >> } >> ) >> cata = my catalog,datestart =start date(date-string),dateend=end date >> >> When I send my request, the only things I get back are some <MYBRAnI >> instance at #123848>-tags. >> >> For the beginning i would just like to get the ids of the items in the >> boundaries. > RE:If you have id set up as catalog metadata, then those objects will each have an id attribute which does what you want. My question: How do i access the objects ? --> what syntax do i have to use ? Please help! Sebastian

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updating homebrew extension of structured text to standard
by Jochen Knuth 23 Jul '02

23 Jul '02

Hi, i have a ZClass with a property which is renderd as structured text. Because i designed this ZClass before there was a standard for including images, i made my own extension of structured text formating. Short: I used __imageobject__ as markup for the image. Now i want to update all my zclass instances to the new syntax (while upgrading to Zope 2.5.1). I have a Python Script listKBE, which call an External Method updateKBE. If i use it with a path with only a few ZClass instances (about 10) it works (slowly). If i use it with a path with about 550 instances it crashes or is extreme slow. Anyone to suggest a faster method? Thank you, Jochen ---------------------------listKBE-------------------------------------- ## Script (Python) "listKBE" ##bind container=container ##bind context=context ##bind namespace= ##bind script=script ##bind subpath=traverse_subpath ##parameters= ##title= ## results=context.Catalog(meta_type='IPRO Knowledge Base Entry',path='/web/Services/knowledge/KnowledgeBase/TechnischesHandbuch/') for result in results: obj = result.getObject() print obj.id #print obj.propertyItems() #for id,val in obj.propertyItems(): # print id issue = obj.Issue newissue = context.updateKBE(issue) obj.propertysheets.properties.manage_changeProperties({'Issue':newissue}) return printed -------------------updateKBE points to kbeimage_search_replace -------- #!/usr/local/bin/python import string import re def punc_func(exclude): punc = r'' for char in string.punctuation: if char not in exclude: punc = punc + r'\%s' % char return punc digits = string.digits letters = string.letters literal_punc = punc_func("'") dbl_quoted_punc = punc_func("\"") strongem_punc = punc_func('*') under_punc = punc_func('_<>') phrase_delimiters = r'\s\.\,\?\/\!\&\(\)' def kbeimage_search_replace(text): expr = re.compile(r'__([%s%s%s\s]+?)__' % (letters, digits, strongem_punc)).search r=expr(text) if r: #print r start, end = r.span(1) newtext='"bild":img:' newtext=text[:start-2]+newtext+text[start:end]+' '+text[end+2:] #print start,end #print newtext return kbeimage_search_replace(newtext) else: #pass return text -- -------------------------------------------------- Jochen Knuth WebMaster http://www.ipro.de IPRO GmbH Phone ++49-7152-93330 Steinbeisstr. 6 Fax ++49-7152-933340 71229 Leonberg EMail: J.Knuth(a)ipro.de

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Massive Problems with sessions
by Joachim Werner 21 Jul '02

21 Jul '02

Hello! Suddenly I am getting massive problems with Zope 2.5.1 sessions. The Zope instance was upgraded from 2.5.0 to 2.5.1 and has a lot more load now as it is in production. Nothing else has changed I guess. The problems: Frequent "duplicate key errors", and now a new one when I try to enter the session_data container (standard install with a temporary folder storing the sessions): Site Error An error was encountered while publishing this resource. KeyError Sorry, a site error occurred. Traceback (innermost last): File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/ZPublisher/Publish .py, line 151, in publish_module File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/ZPublisher/Publish .py, line 114, in publish File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/Zope/__init__.py, line 159, in zpublisher_exception_hook (Object: session_data) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/ZPublisher/Publish .py, line 98, in publish File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/ZPublisher/mapply. py, line 88, in mapply (Object: manage_container) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/ZPublisher/Publish .py, line 39, in call_object (Object: manage_container) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/App/special_dtml.p y, line 61, in __call__ (Object: manage_container) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/DocumentTemplate/D T_String.py, line 473, in __call__ (Object: manage_container) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/Products/Transienc e/Transience.py, line 403, in nudge (Object: session_data) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/Products/Transienc e/Transience.py, line 364, in _getCurrentBucket (Object: session_data) File /usr/local/zope-instances/Zopes/Zope-2.5.1-src/lib/python/Products/Transienc e/Transience.py, line 390, in _clean (Object: session_data) KeyError: 21934557A0Y4KtUyZjs One additional information that might help: The session manager is used from different URLs that point to the same Zope. Can this be the reason for problems? Is there a way of fixing that, e.g. using certain path information in the browser id manager? Any hints? Joachim

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Re: [Zope-dev] Ambiguities in "Inheritance and Class Security Declaration"
by Chris McDonough 21 Jul '02

21 Jul '02

> > I'm sort of stumped as to how the subclass' assertions are applied in > > the absence of InitializeClass! This is not what I expected, I would > > have thought that differing assertions would only be applied if > > InitializeClass was called on the subclass. There's some magic going > > on here that I don't understand. > > The magic is that Persistent has a __class_init__ that calls > InitializeClass for you. (This attribute is actually set by > App.PersistentExtra, called from Globals.) Aha. This is what I was missing! I used to know that, too. ;-) Thanks for clearing it up! - C

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Ambiguities in "Inheritance and Class Security Declaration"
by Ross Boylan 20 Jul '02

20 Jul '02

After reading this section of the development guide, I have a lot of questions (pp 75-76 of the guide). 1. If a subclass redefines a base class method, does the subclass need to do a security declaration on it? The document says "You only need to make security declarations for methods .... your class actually defines. If your class inherits from other classes, the methods of the base classes are protected by the security declarations made in the base classes." The first sentence seems to indicate a security declaration is necessary (since you define the method); the second sentence suggests its not. It depends partly on the meaning of "define" and also "method" (that is, is redefinition considered definition? does method refer to a name or to a specific classes implementation of that name?). 2. Does a subclass need to have security = ClassSecurityInfo() in it if the base class does? Judging from the example, yes. 3. Under what circumstances is the declaration in 2 necessary? For example, only if new method names are introduced and protected? Or any reference to security in the subclass? It seems the latter, from the example. 4. Suppose we wanted to change the security of a base class method without otherwise redefining it. What's necessary then? 5. Under what conditions is InitializeClass necessary for the subclass when the base class has been through InitializeClass? (The guide only addresses the case when the base class has not been so processed. It also says the declarations "filter down", but the implication of this for new method is unclear.) This section has a lot of explicit discussion of odd cases (no security in superclass, redefining permissions on existing methods without changing them) and not enough about the normal cases (my subclass extends some base class methods and defines some new ones). Also, the second paragraph uses "superclass" where I hope it means subclass. Although I would appreciate and responses from the list, I would also like to send these comments to the documents authors. Unfortunately, I see no authorship or contact information in the document. Can anyone suggest some? Thanks.

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Re: [Zope-dev] Leak in 2.5.1 cAccessControl.c !?
by Stefan H. Holek 20 Jul '02

20 Jul '02

Could be. ;-) Does your problem go away when you put export ZOPE_SECURITY_POLICY=PYTHON in your start script? Mine did. I would otherwise not have suspected cAccessControl. Stefan --On Donnerstag, 18. Juli 2002 13:28 -0700 Charlie Reiman <creiman(a)kefta.com> wrote: > Could this be related to the collector issue I already filed? > > http://collector.zope.org/Zope/421 > -- Those who write software only for pay should go hurt some other field. /Erik Naggum/

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How to concatenate ID + string to check for object?
by EvH 20 Jul '02

20 Jul '02

Hi, I've done my homework before posting, but can't find a way out: When adding articles to my intranet, if an icon exists (eg. if it's an article about Zope, I added the Zope icon to ZODB), I will display it in a corner; If no icon exists for this article, I'll display a default icon to avoid having an empty "IMG" box. I've tried multiple things, but none work. Here's the latest trial: //Zope complains that the first line below is NOK <dtml-if expr="<dtml-var id>+'.png'"> <img src="<dtml-var id>.png" border=0> //To check that concatenating both strings works <dtml-var id>.png <dtml-else> <img src="default_icon.png" border=0> <dtml-var id>.png </dtml-if> Any idea? Thx EvH.

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Re: [Zope-dev] Leak in 2.5.1 cAccessControl.c !?
by Charlie Reiman 19 Jul '02

19 Jul '02

Hmm. It appears the script modification did not fix the problem, but patching the source did. So you have my blessing to use collector issue 421 if you want to justify your checkin and drop the bug count by one. Thank you! > -----Original Message----- > From: Stefan H. Holek [mailto:stefan@epy.co.at] > Sent: Friday, July 19, 2002 1:39 AM > To: Charlie Reiman > Cc: zope-dev(a)zope.org > Subject: Re: [Zope-dev] Leak in 2.5.1 cAccessControl.c !? > > > Could be. ;-) > > Does your problem go away when you put > export ZOPE_SECURITY_POLICY=PYTHON > in your start script? > > Mine did. I would otherwise not have suspected cAccessControl. > > Stefan > > > --On Donnerstag, 18. Juli 2002 13:28 -0700 Charlie Reiman > <creiman(a)kefta.com> wrote: > > > Could this be related to the collector issue I already filed? > > > > http://collector.zope.org/Zope/421 > > > > -- > Those who write software only for pay should go hurt some other field. > /Erik Naggum/ >

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Nesting Forms
by Ross Boylan 19 Jul '02

19 Jul '02

I have a product with a number of classes that have subclasses. It seems natural to make the screens for the subclasses by extending those of the superclass. Can anyone suggest a good way to do that? The naive approach is that I have a manage_edit_A.dtml that gives a management screen for A. If B subclasses A, I create manage_edit_B.dtml by copying from the first file and then fiddling with it. Obviously, it would be desirable for a change in A to only require changing a single file. I would prefer a more elegant approach. Perhaps I can define some method in A that the dtml will reference, and then B can override the method to add some extra stuff (the method would return a DTML snippet). First, I'm not exactly sure how to pick up the method from the DTML. Second, I'm not sure if this is the best solution. For one thing, I would prefer to keep all my dtml in separate files, rather than defining it into my methods. Any suggestions? P.S. I'd like to thank Toby Dickenson, Casey Duncan, and R. David Murray for their very helpful responses to my previous question.

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BitTorrent
by Shane Hathaway 19 Jul '02

19 Jul '02

BitTorrent is an interesting, new, open source project. It enhances Internet file downloading with peer-to-peer ideas, taking a lot of the burden off the central server. I tried it out last night. What I didn't know until after I had downloaded it is that BitTorrent is written in pure Python! It integrates with the browser in the same way as ExternalEditor does, with a special mime type that launches BitTorrent. The client is relatively easy to install and very easy to use. http://bitconjurer.org/BitTorrent/ It would be cool to see a Zope product that takes advantage of this. It would be very simple--it would allow users to download anything in Zope via BitTorrent. Say you have a file at: http://zope.example.com/linux/kernels/kernel-2.4.19.tar.gz You could point your users at the following URL and have everything "just work": http://zope.example.com/linux/kernels/kernel-2.4.19.tar.gz/torrentify It would take a huge burden off your server. Anyone interested? I shouldn't take this on myself, but I'd happily help someone out! Shane

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