November 2003 - Zope

Re: APE and bobobase_modification_time
by Gabriel Genellina 21 Nov '03

21 Nov '03

--- In zope(a)yahoogroups.com, Paul Winkler <pw_lists@s...> wrote: > > I'm using APE to copy back and forth from a FileStorage. And I need to set > > bobobase_modification_time (on the APE side) to help keeping things in > > sync. How could I do that? > > generally, bobobase_modification_time is a low-level timestamp > meaning "this object was modified in the database at this time." > You aren't supposed to muck with it. > > You probably want an application-level timestamp, like > DublinCore's modified date. > > Are you using zsyncer by any chance? Its reliance on > bobobase_modification_time is really a bit of a kludge. The procedure is as follows: I export the original data.fs, using APE, to a directory-based hierarchy on the filesystem. Then I use CVS to syncronize this structure among other users, and then copy the modified objects back into the FileStorage. I don't care about undo history (that's done thru CVS) so the storage is re-created each time. This works fine except that, when objects are exported to the filesystem, files are created with the current date/time, and ALL files get marked as 'modified' by CVS, making the update/commit process very long. So I wish to be able to: - set each file's date/time to the 'last-modification-time' of the corresponding, original object in data.fs - and viceversa, set the 'last-modification-time' of each object equal to it's filesystem counterpart after updating. In other words, if objects are unmodified, I want to preserve its date/time; and if they are modified, I want to keep the last-modification-time. I think I could manage to do the first thing, but I have no idea on how to do the second. Gabriel Genellina Softlab SRL

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Complex class structure
by Andre Meyer 21 Nov '03

21 Nov '03

Dear Zopers Here I have a (silly) question with regard to modelling a rather complex class structure in Zope (at least with respect to what I found as examples so far). For my fs/zpt application I have designed a class model (using UML) of a music library with some 20 classes (composer, instrument, cast, setting, etc.). Most examples of Zope that I found use a single content class (like the address book example that uses one entry class). Now I need to add instances of my 20+ classes to the application's main class. How would I do this? Add 20 dictionaries to the main container class? Or put them all in one? What about ids? Use separate names per class or create sub-folders? What about cross-links among instances? What about the _getitem_ method when I have more than one kind of items to list? I guess this is again a matter of getting used to the Zope philosophy. I come from languages like Java where I know how t do this, but it seems to be a bit different in Zope, or not? thanks a lot in advance Andre

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Quick question.
by Goldthwaite, Joe 21 Nov '03

21 Nov '03

I'm a newbie learning Python and Zope. I'm trying to create a Zope product for my application since programming is more familiar to me than HTML. I ran into a problem that caused me to join this list. In the process of figuring out how to best ask the question, I found the answer. I had created a package using the example in "The Book of Zope". When I first restarted the server, I got an error message in the list of products saying that my package was broken. It had an error log showing the line (a typo) that was causing the problem. I fixed the line but restarting Zope kept giving me the same error message on the same line that I had fixed. I decided that something funny was going on so I deleted the package from the "Product Management at /Control_Panel/Products" screen in the hopes that it would be recreated or I would at least get a new error message. The product went away completely and nothing I could do would get it back. I tried moving it to a different directory, changing the metadata name, changing the class names, nothing worked. I could look in the directory and see that my __init__.pyc file was being created so I knew Zope was looking at it but it didn't seem to do anything with it. After working on it for most of the day, I finally found the problem. At some point, I had accidentally deleted the "s" from the end of the constructors' In other words, instead of this; def initialize(context): """Register the EIS class""" context.registerClass( EIS.EIS, constructors = ( EIS.manage_addEISForm, EIS.manage_addEIS ), permission = 'Add EIS', icon='www/icon.gif' ) I had This; def initialize(context): """Register the EIS class""" context.registerClass( EIS.EIS, constructor = ( EIS.manage_addEISForm, EIS.manage_addEIS ), permission = 'Add EIS', icon='www/icon.gif' ) Notice the missing "s" in "constructor =". That was doing it. Now, here's my question, is there an error log anywhere that would have shown what was causing the problem without searching for a needle in a haystack? I was looking all over the place for some kind of message as to why the package wasn't showing up but couldn't find anything. I'm assuming I just don't know where to look.

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[ZSyncer] XML-RPC considered bad
by Dieter Maurer 21 Nov '03

21 Nov '03

We have used ZSyncer for 2 years without problem. But, suddenly, it stopped working -- with an obscure "expat: not well formed exception". German special characters turned out to cause this problem. XML-RPC has a big problem when it should work with a both non-ASCII and non-Unicode site as it does not handle encoding of string data (especially, if it does not know the implicit encoding). When we have installed "PyXML" (to get expat, to use "text/xml" with PageTemplates), the "expat" parser started to complain about these non UTF-8 encoded characters. The formerly used parser apparently just ignored such issues. This is the second time that I got bitten by XML-RPC (its sensitivity with respect to "string" data).. I am now convinced that XML-RPC should not be used for Python-Python communication. I made a ZSyncer variant that uses ZPublisher.Client as RPC protocol and Python's "pickle" to marshal data. This gets rid of XML-RPC. If anyone is interested, let me know... -- Dieter

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Zope and IIS and Apache (oh my!)
by Larry J. C. Prikockis 21 Nov '03

21 Nov '03

this is clearly a variation on a FAQ- but enough of one that none of the existing info seems to be helping me. Here's the setup: - Zope running on linux machine at, e.g., zope.intranet:8080 - Apache running on linux machine, and proxying requests to Zope via usual VHM/rewrite deal at zope.intranet:80 works great... now--- we additionally need to have an IIS (W2k) machine running at iis.intranet:80 that proxies requests to zope.intranet:8080 via the oft-mentioned 404 ASP script (latest version). In the default.asp file on the iis.intranet machine, I have the zopeAddress - http://zope.intranet:8080 at first glance, this all works correctly... I can browse to http://iis.intranet and see the Zope content as expected.... however, logins mysteriously fail. I suspect there's some issue with cookies that's catching me up here, but I can't get a handle on it. Does anyone else have experience fronting a Zope instance on Linux with an IIS instance running on a distinct W2k box? Most of the conversation here seems to involve running Zope and IIS on the same machine--- not sure why that should make a difference... any clues would be much appreciated... thanks- Larry

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SMTP
by Dmitrij Repp 21 Nov '03

21 Nov '03

Hi, Whether there is SMTP-client for Zope with which it is possible not only to send, but also to receive E-mail? And where it to take if it is? __________________________________________________________________ Gesendet von Yahoo! Mail - http://mail.yahoo.de Logos und Klingeltöne fürs Handy bei http://sms.yahoo.de

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Re: Fw: [Zope] some Zope issues: dtml-zpt, permissions, scalability
by Andre Meyer 21 Nov '03

21 Nov '03

> ----- Original Message ----- > From: "Paul Winkler" <pw_lists(a)slinkp.com> > To: <zope(a)zope.org> > Sent: Thursday, November 20, 2003 3:50 PM > Subject: Re: [Zope] some Zope issues: dtml-zpt, permissions, scalability > > > > > That seems unlikely. Can you post your ZPT version, and the actual error > it > > gives you? > > Here is what I and what I receive as error: <form action="." method="post"> <table border=0 cellpadding=2 cellspacing=0 width="100%"> <tr> <td colspan=5> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="right"> <input type="submit" name="index_html:method" value="View"> <select size=1 name="SelectedGroup"> <option value="All">All Groups</option> <span tal:repeat="group python:here.listGroups"> <option value="group" tal:attributes="value group"> <span tal:condition="JobTracker/SelectedGroup"> <span tal:condition="repeat/group/index==here/SelectedGroup">selected</span> </span> <span tal:replace="group">group</span> </option> </span> </select> </td> </tr> </table> </td> </tr> </table> </form> ________________________________________________________________________ Site Error An error was encountered while publishing this resource. Unauthorized Sorry, a site error occurred. Traceback (innermost last): * Module ZPublisher.Publish, line 150, in publish_module * Module ZPublisher.Publish, line 114, in publish * Module Zope.App.startup, line 199, in zpublisher_exception_hook * Module ZPublisher.Publish, line 98, in publish * Module ZPublisher.mapply, line 88, in mapply * Module ZPublisher.Publish, line 39, in call_object * Module Shared.DC.Scripts.Bindings, line 252, in __call__ * Module Shared.DC.Scripts.Bindings, line 283, in _bindAndExec * Module Products.PageTemplates.PageTemplateFile, line 96, in _exec * Module Products.PageTemplates.PageTemplate, line 95, in pt_render <PageTemplateFile at /jobber/> * Module TAL.TALInterpreter, line 200, in __call__ * Module TAL.TALInterpreter, line 244, in interpret * Module TAL.TALInterpreter, line 634, in do_loop_tal * Module Products.PageTemplates.TALES, line 205, in setRepeat * Module Products.PageTemplates.TALES, line 220, in evaluate URL: index_html Line 26, Column 2 Expression: <PythonExpr here.listGroups> Names: {'container': <JobTracker at /jobber>, 'default': <Products.PageTemplates.TALES.Default instance at 0x86a0664>, 'here': <JobTracker at /jobber>, 'loop': <SafeMapping instance at 86e4900>, 'modules': <Products.PageTemplates.ZRPythonExpr._SecureModuleImporter instance at 0x8689cc4>, 'nothing': None, 'options': {'args': ()}, 'repeat': <SafeMapping instance at 86e4900>, 'request': <HTTPRequest, URL=http://localhost:8080/jobber/index_html>, 'root': <Application instance at 8aa1c18>, 'template': <PageTemplateFile at /jobber/>, 'traverse_subpath': [], 'user': meyer} * Module Products.PageTemplates.ZRPythonExpr, line 48, in __call__ __traceback_info__: here.listGroups * Module Python expression "here.listGroups", line 2, in f Unauthorized: You are not allowed to access listGroups in this context (Also, an error occurred while attempting to render the standard error message.) ________________________________________________________________________

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RE: [Zope] Changing Python's Date/Time Input Format
by Wilson, Derek 21 Nov '03

21 Nov '03

I'd also check out the calendar product from Venkata Karthikeyan. I use it on my website with no problems. It's a pretty nice interface too, though it only works with IE5+. Thanks, Derek Wilson -----Original Message----- From: Julian Clark [mailto:Julian.Clarke@b-online.com.au] Sent: Thursday, November 20, 2003 8:42 PM To: zope Subject: [Zope] Changing Python's Date/Time Input Format Hi All. I've got a minor issue with a form which takes a date and returns the string date. I'm wanting the input format to be able to accept any of dd-mm-yy, dd mon year, dd/mm/yyyy. Currently, it works for dd mon year, but it handles other input as mm/dd/yy. (which is kind-of un-natural for those using this form) how should I modify this python script... today=DateTime(input) return today.strftime("%d %B %Y") ... to alert Zope that the incoming string will be always in the order of dd mm yyyy? This is the traceback when the first tuple is not a valid month.  Cheers, Julian Clark _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

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RE: [Zope] Zope threads dying continuosly
by Tim Edwards 21 Nov '03

21 Nov '03

Hmmm... I'll try and explain a bit more about our problems. We found Zope to be generally unstable in that, after a few mins up to an hour or so, Zope would sometimes freeze. Also when multiple people were accessing a Zope application that retreives or modifies data in our MS SQL Server database the Zope server would freeze and have to be restarted - always, not just some of the time. After installing a glibc update for Red Hat 9 that fixes a problem with Python programs not being able to create threads and specifying the -t option in the Zope start script (yes with 500 threads!) it seemed a lot more stable. Now multiple people can use our database access application without it crashing. As for the 500 threads I have now put it down to 9, however it doesnt seem to make that much of a difference in resources - a ps listing tells us we only ever have the normal 2 z2.py processes open at a time. I am now running the Zope server in debug mode on a terminal and can see that it occaisionally crashes and automatically restarts iteself. Also if I go into the management interface and click on a ZSQL method it crashes - and then restarts itself. Applications that use those methods still seem to work for some reason. However I cannot get to the management interface page for any ZSQL method in the whole Zope installation. Thanks -----Original Message----- From: Dylan Reinhardt [mailto:zope@dylanreinhardt.com] Sent: Friday, 21 November 2003 4:16 PM To: Tim Edwards Cc: 'Zope(a)zope.org' Subject: RE: [Zope] Zope threads dying continuosly On Thu, 2003-11-20 at 18:15, Tim Edwards wrote: > Thanks for your replies, the original reason I asked is that we are having > stability issues with Zope. Such as...? > I have tried it without the demon process, but > that doesn't appear to help. I then reenabled the demon process and changed > the thread count to 500 500 is a huge number of threads. You should probably stick with single digits until you have a well-formed case for doing otherwise. HTH, Dylan

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Re: [Zope] Zope 2.7 and ZEO
by Tim Terlegård 21 Nov '03

21 Nov '03

> > Those instructions was a little bit confusing, > > if i may ask, what's confusing about the article? maybe i can > straighten something out. also, that's not a real step by step > howto .. :P You were not supposed to read that statement ;-) "make instance will emulate the zope2.x way of working, i.e no INSTANCE_HOME" Does that mean I should run it? A newbie doesn't know if it's good or bad to emulate zope2.x. I didn't do "make instance" and everything seems fine. Ah, maybe the reason for the confusion is a mistake in the text. The first yellow square, should it say makezeoinstance instead of mkzopeinstance? Would make sense :) What directory structure makes sense? I hade ZEO and Zope going into the same instance. That results in less directories. Should I put the instance directly in /path/to/zope? I would then get only one bin/ and one etc/. Tim

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