March 2005 - Zope - Zope lists

Help interpreting traceback? ZODB Couldn't load state
by Jean Jordaan 16 Mar '05

16 Mar '05

Hi all A couple of objects in our one ZODB are acting up. This is what I see when I try to browse to a page which lists Query instances: Unauthorized: The container has no security assertions. Access to 'id' of (Query instance at 40596140) denied. Some of them are OK, three of them aren't. When I see the above in the browser, I see the following in the log: 2005-03-15T09:56:19 ERROR(200) ZODB Couldn't load state for 0x03ad7e Traceback (most recent call last): File "/home/upfront/Zope-2.7.3-0/lib/python/ZODB/Connection.py", line 600, in setstate self._set_ghost_state(obj, p) File "/home/upfront/Zope-2.7.3-0/lib/python/ZODB/Connection.py", line 639, in _set_ghost_state state = unpickler.load() AttributeError: 'bool' object has no attribute '__dict__' That's repeated 18 times, for 3 different ids. The following test script finds 3 paths, but there's something wrong with the returned objects. For example, they don't have ids! obj.getId() acquires the container's id. for p in context.Catalog(meta_type='Query'): try: obj = p.getObject() x = obj.id except: r.append( p.getObject() ) -- Jean Jordaan http://www.upfrontsystems.co.za

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Database not in sync for days ?
by Renfer Serge (EDU) 16 Mar '05

16 Mar '05

Hello, I had that same problem a month ago: a Zope 7.4 instance turning on a Solaris 9 with a 2.7 Gb Data.fs file, (hypo.ge.ch:8080 is for schools of secondary degrees in Geneva, I introduced zope there a few years ago and it meets a great success among teachers and schools but our base starts to grow big and we are encountering big problems to manage it with very little resources !) On saturday evening there has been a failure that required my intervention, I stopped zope and tried out the fsrecover script. Everything went OK and there had been no error found by fsrecover (?). I restarted Zope removing the Data.fs.index (I noticed that often Zope wouldn't start because of discreapencies between Data.fs and Data.fs.index => I wonder if it is not ZSync that does that mess?) It restarted OK, but all that has been made for 2 weeks was gone !!! Loking at the log to find out why, I saw in the event.log a lot of ERRORs of that kind: 2005-03-11T23:08:04 ERROR(200) ZServer uncaptured python exception, closing channel <ZServer.HTTPServer.zhttp_channel connected 213.3.93.136:189 89 at 0x77bf828 channel#: 167268 requests:> (socket.error:(11, 'Resource temporarily unavailable') [/usr/local/lib/python2.3/asynchat.py|handle_ read|88] [/prd/data/Zope/var/zope2.7.4/lib/python/ZServer/medusa/http_server.py|recv| 423] [/usr/local/lib/python2.3/asyncore.py|recv|356]) Does anyone know, what does that mean and could it be the problem I have in this configuration? Dieter Mauer told me that after each transaction zope writes into the Data.fs, how can it be that I have a base with 2 weeks of missing data from the moment I do a restart? Thank you for your help, folks, I get despaired with that problem (many teachers lose hours of their work) serge

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passing positional paramaters
by Ivan Stout 16 Mar '05

16 Mar '05

Greetings. I am trying to create an open source communal translation zope product thingy and have run into a snag. I had everything working, but then I realized that I needed to distinguish between what the language that the original document bein translated was in, which required passing an additional paramater to my query to gadfly. Well, this supposedly "broke the paramater chain" requiring me to explicitly add positional paramaters. The problem is, though I no longer get an error, no results are returned from my table. The paramaters are filtering the query, so I believe that my values are getting altered in some way that is causing them to not match anything. Here is what I suspect is causing me trouble . . .(the "----------------->" part): <dtml-var name> <dtml-var doclang> <form action="parsegettranslation.py" method="get"> -----------> <dtml-in expr="gettransdoc(_.None,_,name='name',doclang='doclang')"> <dtml-var ordering> <dtml-var content> Thanks!

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Report generation systems
by Dennis Allison 16 Mar '05

16 Mar '05

I am looking for a report generation system for Zope that would allow a user to dynamically specifiy a report using information drawn from our backend MySQL server. Crystal Reports is a commercial product in this space, but has many more features than we need and is costly.

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How to change default python interpreter when launching zope with pythonservice.exe
by rdevriese＠comcast.net 16 Mar '05

16 Mar '05

Hello, Can someone point me to documentation that describes how to specify a different instance of the python interpreter when starting zope with pythonservice.exe. I have zope running on windows xp. Everything works fine if I use the runzope.bat file from the zope/bin directory, but when I have zope start as a service it uses the python interpreter that is bundled with zope. -- Thanks Rick

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zClasses & MailHost Privileges
by Gre7g Luterman 16 Mar '05

16 Mar '05

I've created a product with zClasses that includes a script. The script must create a file in the current directory and then send a notification e-mail. (I put the MailHost instance in the product also.) I set the manager proxy on the script so that it would have sufficient access when run anonymously, but it didn't seem to work. The weird thing is that the script has enough rights to create the file -- so the proxy thing is obviously happening -- but it can't send the e-mail. Instead I get an unauthorized error: You are not allowed to access 'send' in this context. My guess is that the fact that this script is running within a zClass product is somehow restricting some, but not all, of the rights. That doesn't shock me, but the vital question is "How the heck do I make sure that my product has enough rights to send e-mail?" I tried to install that VerboseSecurity package, but I guess I didn't do it correctly because the error messages and log messages have no changed. They give me no new information about the problem. Can anyone out there please give me a quick step-by-step of what I have to change so that my product will have the right to send e-mail? Thanks in advance, Gre7g

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COREBlog skins
by Brian Sullivan 16 Mar '05

16 Mar '05

I am thinking about using the COREBlog product as a blog on Zope. The supplied default skins however are somewhat less than visually pleasing (at least to my eye). Does anybody have any other skins -- or can point to sites using CoreBlog that have a different look?

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Re: [Zope] Re: Regarding connecting to ZODB.
by Chris Withers 16 Mar '05

16 Mar '05

Karthikeyan palani wrote: > Hi, > I am developing a content management system based on Plone. i need to > know how to connect to a zodb.(Data.fs) and retrive infomation from > Data.fs. > Please send me an example code. Go ask on a Plone list... Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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building a Javascript array with TAL in ZPT
by Etienne Desgagné 16 Mar '05

16 Mar '05

Hi everyone, I need to buid a javascript array of this form: var theArray = new Array("123|Beth","543|John","234|Ben","43|Leia","76|Steven","45|Rebecca","7686|Travis","3456|Kirk"); but by using TAL in a ZPT. The values come from a ZSQL method. It could look like this: var theArray = new Array( 1, ); but this is not working. (the ZSQL method contain the two columns of value) Someone have an idea? Thanks Etienne

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Double and Triple Posts
by Andy Yates 16 Mar '05

16 Mar '05

I have a form that posts to a python script which can take several seconds to run. Sometimes the script gets called 2 or 3 times in the same request. It is not easy to reproduce but it seems to happen at least once every 20 requests. This is happening on two different versions of Zope and in two completely different projects. Zope only logs a single request. However, I know it is getting called more than once because the script writes to syslog. I've packet sniffed the browser and it is only sending one post. It happens in IE and FireFox but seems to be easier to reproduce in IE. IE will let you click more than once on the submit button. When I click the submit button twice sometimes I get 3 or 4 runs of the script. I would expect to get only two. It seems to happen much more often when I do this. (FireFox will only let you press the submit button once) It seems to happen if the script reads and writes values to context.REQUEST.SESSION. When I take this out it seems to stop. (It can be hard to reproduce) To reproduce this I created a script that calls an external method to syslog a message. Then it reads and writes to context.REQUEST.SESSION. Then it calls another external method to sleep 15 seconds. Finally it prints a message and returns. I see this behavior on Zope-2.7.3 and Zope-2.6.1. context.zsyslog('Snooze test' ) foo = context.REQUEST.SESSION.get('foo', 1) if foo==1 : context.REQUEST.SESSION.set('foo', 0) context.REQUEST.SESSION.set('bar',123) context.Snooze(15) print "I'm awake now!" return printed Please let me know if this is happening anywhere else. Andy

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