February 2007 - Zope

Zope 2 and Zope 3
by Geoff Gerrietts 15 Feb '07

15 Feb '07

I have a couple questions about the current game plan for Zope development that I was unable to answer for myself by searching through mailing list archives and the zope.org website. I hope my inability to answer them is not merely a symptom of poor search term choices, and I hope someone can answer them for me. I've posted a couple times before (a long time ago) about the large web application I work on; it's many hundreds of KLOC and an unfortunately large percentage of it is DTML. It's still more or less in that state; the realities of being a for-profit business in a rapidly evolving marketplace permit very little time for maintenance or aggressive refactoring of the application. That's the background for my questions; I'm trying to figure out how loudly I can shout "Impending doom!" to upper management without endangering my credibility. 1. Last time I talked to anyone from Zope Corp, the plan was to quiesce Zope 2 in favor of Zope 3. At that time, I think I remember people saying 2.9would be the last in the Zope 2 series. Now there's a 2.10, so clearly it wasn't. How long does a business like mine have before there is no clear upgrade path in the Zope 2 series? Is 2.10 now the final Zope 2 release, or will there be a 2.11 and 2.12? 2. Whenever someone asks about moving an existing application from Zope 2 to Zope 3, there's a round of flip "oh you'll hafta start over" responses. I understand that the two architectures are fundamentally different, and that I'll need to rebuild my object database, etcetera. Am I also correct in believing that all products must be completely rewritten, and that DTML is no longer a supported templating language? Has the users/roles/permissions security structure disappeared or been supplanted? I am trying to ascertain at a glance how much we will need to rebuild for ourselves; if it's enough then the problems we have had with Zope (poor scaling, poor integration with source control) may outweigh the advantages of remaining on the platform. Thanks, --G.

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Re: [Zope] Error trapping Duplicate entry in a database
by larrymcdonnell＠att.net 15 Feb '07

15 Feb '07

Hi, Thanks for the response, can you point me to some examples of python code that will handle this situation. Sorry for th html... Thanks, Larry -------------- Original message ---------------------- From: "Jonathan" <dev101(a)magma.ca> > It would be much easier (and preferable) to handle the data processing > activities in python (a script or external method) and just use DTML to > display the results. You could easily handle the looping, testing in python > and then just return 'success' or 'failure' which your DTML method could > test for and then display an appropriate message to the user. > > > Jonathan > > P.S. please don't post in HTML... > > > > ----- Original Message ----- > From: larrymcdonnell(a)att.net > To: zope(a)zope.org > Sent: Thursday, February 15, 2007 9:34 AM > Subject: Re: [Zope] Error trapping Duplicate entry in a database > > > > > -------------- Original message from larrymcdonnell(a)att.net: -------------- > > > Hi, > > Thanks for the pointers but how can I trap for the first error. I am > populating a list and if the user makes a mistake and uses the wrong > application. I want to display only one message and the link to the correct > application. > > With this code the message is repeated for each entry. > > <dtml-call "REQUEST.set('student_score1', > student_score1_temp[loop_counter])"> > <dtml-try> > <dtml-call expr="create_holistic_score_record(REQUEST)"> > <dtml-except IntegrityError> > <dtml-call "REQUEST.set('dup_rec', 'dup')"> > <dtml-if expr="dup_rec=='dup'"> > This class already exist in the database - Please use Update > </dtml-if> > </dtml-try> > > This class already exist in the database - Please use Update > This class already exist in the database - Please use Update ... > > I just want to stop it after the first error. > > Thanks in advance, > > Larry > > > > _______________________________________________ > 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] Error trapping Duplicate entry in a database
by larrymcdonnell＠att.net 15 Feb '07

15 Feb '07

-------------- Original message from larrymcdonnell(a)att.net: -------------- Hi, Thanks for the pointers but how can I trap for the first error. I am populating a list and if the user makes a mistake and uses the wrong application. I want to display only one message and the link to the correct application. With this code the message is repeated for each entry. <dtml-call "REQUEST.set('student_score1', student_score1_temp[loop_counter])"> <dtml-try> <dtml-call expr="create_holistic_score_record(REQUEST)"> <dtml-except IntegrityError> <dtml-call "REQUEST.set('dup_rec', 'dup')"> <dtml-if expr="dup_rec=='dup'"> This class already exist in the database - Please use Update </dtml-if> </dtml-try> This class already exist in the database - Please use Update This class already exist in the database - Please use Update ... I just want to stop it after the first error. Thanks in advance, Larry

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TAL expression
by Garito 15 Feb '07

15 Feb '07

Hi all! if here/Object executes the Object how can I retrive only the object with a TAL expression? Thanks! -- Mis Cosas http://blogs.sistes.net/Garito

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python script syntax
by garry saddington 15 Feb '07

15 Feb '07

I want to do something like this in a script: forms='7L' context.forms.manage_addFolder('filey') ie. substitute the variable 'forms' for the correct value but I can not get the syntax correct, can anyone help? regards garry

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Error trapping Duplicate entry in a database
by larrymcdonnell＠att.net 14 Feb '07

14 Feb '07

Hi, I am trying to find a friendlier way of error traping when I am perform some database activities. The one I am looking for first is checking for a duplicate entry in a database. I googled around but I could not find the answer I am looking for. I am using an older version of zope (Zope 2.6.1) and I am still using DTML. Any examples or pointers would be a big help. Thanks in advance, Larry

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adding value to the path
by Kate Legere 14 Feb '07

14 Feb '07

When I submit this: <input name="branch/manage_editProperties:method" type="submit" class="form-element" value="Save Changes" / > It works very nicely. I'd like the user to choose the page to amend so I have a select option to choose the page (in this case the one named 'branch' <select size="3" width="100" name="pageName"> <dtml-in "getParentNode().objectItems('DTML Document')" > <dtml-if "id() != 'index_html'"> <dtml-if "id() != 'editProperties'"> <option value="<dtml-var id>"> <dtml-var title_or_id></option> </dtml-if> </dtml-if> </dtml-in> </select> And I think this ought to work.. but it doesn't... <input name=document.propForm.pageName.value+"/manage_editProperties:method" type="submit" class="form-element" value="Save Changes" / > It does absolutely nothing. How do I pass it the value to the input name? Katie

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External Method importing modules
by Alan 13 Feb '07

13 Feb '07

Dear List, I have an external method and now I developed I new module in a separated file and then I am trying to make my external method to import it but I am failing here. Where should place my module file in order to be found by my external method? I tried to place it in the same folder of my external method, but no success. Any help would be very appreciated. Many thanks in advance. Cheers, Alan -- Alan Wilter S. da Silva, D.Sc. - CCPN Research Associate Department of Biochemistry, University of Cambridge. 80 Tennis Court Road, Cambridge CB2 1GA, UK. >>http://www.bio.cam.ac.uk/~awd28<<

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Re: [Zope] Re: Extract Files from ZODB
by Jonathan 13 Feb '07

13 Feb '07

----- Original Message ----- From: "Jonathan" <dev101(a)magma.ca> To: <zope(a)zope.org>; "Carlosfocker" <carlosfocker(a)gmail.com> Sent: Tuesday, February 13, 2007 4:05 PM Subject: Re: [Zope] Re: Extract Files from ZODB > > ----- Original Message ----- > From: "Carlosfocker" <carlosfocker(a)gmail.com> > To: <zope(a)zope.org> > Sent: Tuesday, February 13, 2007 3:57 PM > Subject: [Zope] Re: Extract Files from ZODB > > >> Is that Python? Where should I be executing this code. Do I create a >> python >> script? I'm not a python programmer. If you can help guide help I would >> be >> grateful. > > This code (from previous msg): > > for fileObj in container.objectValues('File'): > <do something with the file> > > is python and can be executed in either a python script or an external > method (depends on what you want to do with the file object once you have > it). > > You are going to have learn some python! P.S. you are also going to have to learn some Zope! Jonathan

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Re: [Zope] session
by Maciej Wisniowski 13 Feb '07

13 Feb '07

javi, please, STAY on the mailing list! > i put this in a new extractCredentials but it don´t work: Again... what 'don't work' means? Raises exception? Have you tried to debug your code? Maybe try to use pdb? AFAIR there is a nice tutorial about using pdb with plone. I think this should help you a lot in understanding what happens in PAS and your plugin. And one more thing. I'm not aware of plone issues here so there may be something different because of this. -- Maciej Wisniowski

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