- Zope-Dev - Zope lists

AttributeProvider and type information
by John Eikenberry 11 Oct '00

11 Oct '00

I just want to ask a couple quick questions... First, when using the AttributeProvider class you are pretty much required to subclass it to add methods for altering the values of the attributes. Basically I want to be sure I'm not missing something criticle as there don't seem to be any methods on the default dataskin class for this (as there are for propertysheets)... and it seems like there should be. Related to this is dealing with typing information like PropertySheets used (via the _properties attribute). Wouldn't make sense to keep the AttributeProvider consistent with this... instead of the simple Attributes list? Seems like the type information and other meta information would as useful for handling attributes on the dataskin as for propertysheets. -- John Eikenberry [jae(a)zhar.net - http://zhar.net] ______________________________________________________________ "A society that will trade a little liberty for a little order will deserve neither and lose both." --B. Franklin

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Building Zope on Linux
by Sin Hang Kin 11 Oct '00

11 Oct '00

Recently I report the MyMath.h is missing. After receiving the help from the list, I realize I have just got the python 2.0 beta from the sourceforge cvs. the file must have been removed from python. Are there any branch of Zope which is intended to run on Python2? I would like to propose a new branch for python 2 support on the cvs. Rgs, Kent Sin --------------------------------- kentsin.weblogs.com kentsin.imeme.net

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Xron on linux: Dispatcher thread stops after a while
by Steve Alexander 11 Oct '00

11 Oct '00

Zope 2.2.2, Xron-0-0-9, Python 1.5.2 I'm running this on i386 Linux. I run a development server, with that server running in debus mode (-D). I also run a production server, which runs detached from any console. When I use Xron for a while on my development server, I get the text currentThread(): no current thread for 2051 or something similar printed out to the console. This is caused by a harmless looking debugging line in /usr/lib/python1.5/threading.py Line 523 onwards: def currentThread(): try: return _active[_get_ident()] except KeyError: print "currentThread(): no current thread for", _get_ident() return _DummyThread() My development server just emailed me an error (from standard_error_message): Traceback (innermost last): File lib/python/ZPublisher/Publish.py, line 171, in publish File lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: trigger) File lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: trigger) File lib/python/Products/Xron/XronDTMLMethod.py, line 126, in trigger (Object: purge_pending_bookings) File lib/python/Products/Xron/XronDTMLMethod.py, line 153, in arm (Object: purge_pending_bookings) File lib/python/Products/ZCatalog/CatalogAwareness.py, line 193, in reindex_object (Object: purge_pending_bookings) File lib/python/Products/ZCatalog/CatalogAwareness.py, line 189, in unindex_object (Object: purge_pending_bookings) File lib/python/Products/Xron/Schedule.py, line 99, in uncatalog_object (Object: Traversable) File /var/tmp/python/python-root/usr/lib/python1.5/threading.py, line 287, in set File /var/tmp/python/python-root/usr/lib/python1.5/threading.py, line 233, in notifyAll File /var/tmp/python/python-root/usr/lib/python1.5/threading.py, line 215, in notify File /var/tmp/python/python-root/usr/lib/python1.5/threading.py, line 527, in currentThread IOError: (0, 'Error') Most of the top of the traceback isn't important. What I think is happening is that the print statement on line 527 of threading.py fails, because it is running detached from a console. This produces an IOError, and causes the Xron Dispatcher thread to terminate, and thus stops Xron from working until Zope is restarted. Suggested solutions: The obvious solution is to patch threading.py. This is not good for folks who want to use Xron on a hosting provider's server, where they may not be able to patch the python source. Zope could be made to ensure it provides a /dev/null sort of file for sys.stdout, if it is detached from the console. A workaround would be to use the STUPID_LOG_FILE (or whatever it is called now), as, if I remember correctly, it sends sys.stdout to a file. Xron could do something to ensure that sys.stdout goes somewhere before it calls Event.set(). Xron cannot just put a try: except: block around ScheduleChange.set(), because the call to set the Event would still not succeed. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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Strange permissions in the (built-in) API reference
by Dieter Maurer 10 Oct '00

10 Oct '00

I have just thouroughly looked through the API reference which is built in Zope 2.2.2. I found many strange permission statements, e.g.: * all methods of "PropertySheets" can only be used from Python * while "PropertySheet.propertyItems" can be used with permission "Access Contents Information", "PropertySheet.getProperty" can be used from Python only * "ObjectManagerItem.restrictedTraverse" can be used from Python only * some permission are given as "XXX" (e.g. "ObjectManagerItem.this") I wonder, if this is caused by the API reference being shipped with "data.fs.in" (which, in my case, is old, at least 2.2.1). If this would be the case, then it might be better to have such documentation outside in the file system, as "data.fs" tends to taken over from older installations to newer ones. Besides, there are many small problems with structured text. One particular instance is the removal of default arguement values '', caused by the interpretation of "'". Dieter

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Newbie SQL Question
by Yvonne Totty 10 Oct '00

10 Oct '00

HI! I am having a slight newbie problem and for the life of me cannot find any references for how to do it. I have input boxes on a page. I want the information from that box to be input into a database table upon clicking the Submit button. I cannot figure out how to get that information from point 'A' to point 'B'. PLEASE HELP! TIA, Yvonne Totty

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slashdot article
by Josh Zeidner 10 Oct '00

10 Oct '00

Slashdot mentions Zope in an article about a medical company that *patented* the idea of online publishing and content management. They seem to think they came up with the idea of coodinating content *on the internet* . Take a look . http://slashdot.org/article.pl?sid=00/10/03/1523228 -josh zeidner _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.

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Fw: [Zope-dev] ZPublisher.Client
by Loren Stafford 10 Oct '00

10 Oct '00

----- Original Message ----- From: "Loren Stafford" <lstaffor(a)dynalogic.com> To: "Andrew Edmondson" <a.edmondson(a)eris.dera.gov.uk> Sent: October 09, 2000 10:59 AM Subject: Re: [Zope-dev] ZPublisher.Client > This is a known problem. > http://classic.zope.org:8080/Collector/1480/view > > -- Loren > > > ----- Original Message ----- > From: "Andrew Edmondson" <a.edmondson(a)eris.dera.gov.uk> > To: "Zope-Dev" <zope-dev(a)zope.org> > Sent: October 09, 2000 03:11 AM > Subject: [Zope-dev] ZPublisher.Client > > > > I used to use Client.py quite a lot for calling zope objects through > the web > > from python. > > > > However, now that I've upgraded to Zope 2.x it fails. > > > > > > (Zope 2.2 ZPublisher, connecting to Zope 2.1.2) > > Traceback (innermost last): > > File "/u/g/aedmondson/backups/pack_db.py", line 22, in ? > > pack() > > File "/u/g/aedmondson/backups/pack_db.py", line 19, in pack > > return(apply(Client.Function(place,username=user, password=pwd), > (), > > kw)) > > File "/usr/local/ZOPE2.1.2/lib/python/ZPublisher/Client.py", line > 221, in > > __call__ > > raise NotAvailable, RemoteException( > > bci.NotAvailable: (111, 'Connection refused') (File: > > http://localhost/Zope/fastcgi/Control_Panel/Database/manage_pack Line: > > days:int=0) > > None None for None > > > > (Both Zope 2.2 (in fact, the same python)) > > Traceback (innermost last): > > File "<stdin>", line 11, in ? > > File "<stdin>", line 8, in test > > File > "/usr/local/Zope-2.2.0-linux2-x86/lib/python/ZPublisher/Client.py", > > line 221, in __call__ > > raise NotAvailable, RemoteException( > > bci.NotAvailable: argument 1: expected read-only character buffer, > tuple > > found (File: http://localhost/idm Line: []) > > None None for None > > > > Is this a problem with ZPublisher, or me? > > > > Thanks, > > > > -Ed > > > > > > _______________________________________________ > > 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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Re: [Zope-dev] ZPublisher.Client
by Dieter Maurer 10 Oct '00

10 Oct '00

Andrew Edmondson writes: > I used to use Client.py quite a lot for calling zope objects through the web > from python. > > However, now that I've upgraded to Zope 2.x it fails. > __call__ > raise NotAvailable, RemoteException( > bci.NotAvailable: (111, 'Connection refused') (File: > http://localhost/Zope/fastcgi/Control_Panel/Database/manage_pack Line: > days:int=0) > None None for None The "Connection refused" usually indicates, there is not server listening at the required port: in your case at "localhost:80". Dieter

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Trying to catch up - what are the best Zope tools today?
by Spicklemire, Jerry 09 Oct '00

09 Oct '00

Itai asked: > "I started reading about ZPatterns but I still can't get my head > around it... I'm wondering if I should try to learn it fast enough > for this project, or stick to what I already know. What in people's > experience is the typical learning curve for ZPatterns? How much am I > going to have to figure out to be able to build support for SQL > storage? FYI ZPatterns has been a rapidly moving target, but it's looking pretty solid now, and a few folks have managed to wade in and make sense of it already. There's even some documentation at : http://www.zope.org/Members/pje/Wikis/ZPatterns/HomePage Most of the discussions you'll see on this list between Steve Spicklemire and Phil Eby / Ty Sarna are directly related to the next rev. of EMarket, which will be based on ZPatterns. If you think the flexibility that comes from a cleanly implemented Object Pattern will be worth the learning curve, ZPatterns is just about there now. The "how" of storing data in an RDBMS, accessed with ZSQLMethods is no different with ZPatterns. The real difference is "who" does the storage and retrieval. This is the concept of the "Specialist" object, which "knows" all about the specifics of the data and storage implementation. In any case, get to know ZClasses and PythonMethods, which may not have been ready for prime time, or even released, last time you looked. Those will be useful no matter which direction you choose. Later, Jerry S.

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Re: [Zope-dev] basci properties
by Robin Becker 09 Oct '00

09 Oct '00

In message <39E1D777.6B114FEC(a)kaivo.com>, Paul Erickson <erickson(a)kaivo.com> writes Well I was trying to get a self contained class initialisation using a bit of python I had defined a propertsheet called ClassConstants containing a tokens property with "A B C" in my extern method initialiser I was doing self = self.this() obj = self.ZC.createInObjectManager(id, REQUEST) obj.manage_addProperty('t','tokenList','multiple selection') in the add form I could not seem to get access to the property tokenList ie I wasn't getting nice things from either <dtml-with "_.namespace(S=tokenList)"> not seeing the property. or <dtml-with "_.namespace(S=Control_Panel.Products.myProduct.ZC.propertysheets.common .ClassConstants.getProperty('tokenList')> failing with a permissions problem in the end I had to define a product external method called getTokenList which did def getQProjectList(self): obj = self.unrestrictedTraverse("Control_Panel/Products/myProduct/ZC/propert ysheets/common/ClassConstants") return obj.getProperty('tokenList') How does one define properties which are visible at construction time? >Just create a ZClass that inherits from ObjectManager, then you will >have to use the Subobjects tab to tell it what kind of objects it can >contain. > >For properties, click on the Property Sheets tab and add one (be sure >you're in the class, not the product). Put whatever properties on it >that you like. Remember that properties won't get set in the constructor >unless you uncomment the > ><dtml-call "propertysheets.Basic.manage_editProperties( > REQUEST)"> >line in the constructor. (change "Basic" if that's not what you called >your property sheet. > >Robin Becker wrote: >> >> I want to create a ZClass that is essentially a folder with some added >> properties. I can see no way to add to the Basic properties of my >> ZClass. >> >> Is there a way to do that? >> -- >> Robin Becker >> >> _______________________________________________ >> 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 ) -- Robin Becker

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