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Cached Variables
by calisp＠gmail.com 23 Jun '05

23 Jun '05

Hi, I am developing an application that is a front end to an RDBMS. Sometimes, when loading a page, several scripts get called that all require the same information from the database. It would obviously be costly for each script to call the same ZSQL method. My method for avioiding this senario is... Get the scripts to call another script that is a wrapper to the ZSQL method. This wrapper script returns context.REQUEST[value_name] if it exists or, if it does not exist, executes the ZSQL method, stuffs the result into REQUEST[value_name] and then returns it. I am not convinced that this is the right way of dealing with this situation however. Is there a better way? Thanks, Calisp

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From Zope 2.5.1 to Zope 2.7.6
by Tim Suter 23 Jun '05

23 Jun '05

I am upgrading our current Zope from 2.5.1 to Zope 2.7.6. I have the new version installed as a different instance on a different server. The Zope 2.5.1 is in tact and what I am wondering is, how do you migrate everything from the older to the newer? I thought exporting the .zexp out of Zope 2.5.1 would be ok. However, when I import it into the new install, it isn't the same as the original. For example, I exported knowledge.zexp from the 2.5.1 and imported into the 2.7.6. Now, when I go to pull up the page that points to info related to this data, the subtopics are now listed below the contents of the original page. In looking at the html (I am no HTML expert at ALL), it did not appear that there was even anything related to subtopics. It must be a control from within the Zope management interface. I guess I just want to know how to migrate properly with little administrative effort. Thanks, Tim

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bytecode cache?
by Jaroslav Lukeš 23 Jun '05

23 Jun '05

Dear zope core developers, I have idea about bytecode cache in Zope, it is possible to implement? What I mean: python scripts (in ZODB), DTML documents/methods, ZPT will be bytecode compiled in similar way like ordinary .py scripts into .pyc and then run much faster than "noncompiled" ZODB objects. I think that it should have significant speed improvement. ... or I am totally out? Best regards, -- Jaroslav Lukesh ------------------------------------------------------------- This e-mail could not contain any viruses because I use Linux

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TypeError: Cache values must be persistent objects.
by Nikko Wolf 23 Jun '05

23 Jun '05

Help! I'm trying to develop a filesystem-based Product (here 'ABCD') and unless I remove the "ABCD" folder from my Products directory, I get the following error IN THE MANAGEMENT INTERFACE. Is it possible to determine what's causing the problem? After multiple restarts, I did a global "Find" in the ZMI and (I think) deleted all objects of type "ABCD Content". But still the problem persists (no pun intended). Gaah! How can I fix this? ===== event.log contains ========== 2005-06-21T14:57:17 ERROR(200) ZODB Couldn't load state for 0x28b5 Traceback (most recent call last): File "/usr/local/zope/lib/python/ZODB/Connection.py", line 600, in setstate self._set_ghost_state(obj, p) File "/usr/local/zope/lib/python/ZODB/Connection.py", line 639, in _set_ghost_state state = unpickler.load() File "/usr/local/zope/lib/python/ZODB/Connection.py", line 227, in _persistent_load self._cache[oid] = object TypeError: Cache values must be persistent objects. ========== FROM THE ============================= Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Shared.DC.Scripts.Bindings, line 306, in __call__ Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec Module App.special_dtml, line 175, in _exec Module DocumentTemplate.DT_Let, line 76, in render Module DocumentTemplate.DT_In, line 643, in renderwob Module DocumentTemplate.DT_In, line 771, in sort_sequence Module ZODB.Connection, line 600, in setstate Module ZODB.Connection, line 639, in _set_ghost_state Module ZODB.Connection, line 227, in _persistent_load - __traceback_info__: ('\x00\x00\x00\x00\x00\x009^', ('Products.ABCD.XML_File', 'XML_File')) TypeError: Cache values must be persistent objects. ============================= Plone version: 2.0.5 Zope version: (Zope 2.7.6-final, python 2.3.4, linux2) Apache version: CMF version (if known): CMF-1.4.7 Browser(s) and version(s): Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050511 Operating system: linux2 Python version: 2.3.4 (#1, Feb 2 2005, 12:11:53) [GCC 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)] Debug mode: Yes ============================= ABCD 0.4 ATExtensions 0.6 installed Archetypes 1.3.3-final installed BTreeFolder2 BTreeFolder2-1.0.1 CMFActionIcons 0.9 installed CMFCalendar CMF-1.4.7 installed CMFCore CMF-1.4.7 CMFDefault CMF-1.4.7 CMFFormController 1.0.4 installed CMFMember 1.0.1 installed CMFPlone 2.0.5 CMFQuickInstallerTool 1.5.1 CMFTopic CMF-1.4.7 CMFTutorial 0.1.2 CompositePage CompositePage-0.2 DCWorkflow CMF-1.4.7 Epoz 0.8.5 installed ExternalEditor 0.8 ExternalMethod External Method-1-0-0 FlexibleTopic 1.1 installed Formulator Formulator 1.6.2 GroupUserFolder 2.0.1 installed Lesson 0.1 LocalFS LocalFS-1-7-andreas MIMETools MailHost MailHost-1-3-0 MimetypesRegistry 1.3.3-final05 installed Minimal 0.1 MySite 0.4 installed OFSP OFSP-1-0-0 OpenFlow 1.1.0 PageTemplates PageTemplates-1-4-0 PlacelessTranslationService 1.0 PloneCollectorNG 1.2.6 installed PloneErrorReporting 0.11 installed PluginIndexes PortalTransforms 1.3.4-final installed PythonScripts PythonScripts-2-0-0 Sessions SiteAccess SiteAccess-2-0-0 SiteErrorLog StandardCacheManagers StandardCacheManagers-1-1-0 TemporaryFolder Transience ZCTextIndex ZCatalog ZCatalog-2-2-0 ZGadflyDA ZODBMountPoint ZReST 1.1 ZSQLMethods ZopeTutorial Zope Tutorial 1.2 generator 1.3.0-final17 mxmCounter 1.1.0 validation 1.3.2-final

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Re: [Zope] ZPT & contents slot
by J Cameron Cooper 22 Jun '05

22 Jun '05

John Poltorak wrote: > On Tue, Jun 21, 2005 at 03:16:11PM -0500, J Cameron Cooper wrote: > >> John Poltorak wrote: >> >>> If I create a macro which defines a slot called 'content', is there >>> any way to have that slot populated by a file with a specific name >>> if it exists in a folder? >>> What I'd like to do is create a structure text file, in each of the >>> folders A B C and have it automatically loaded into a content slot >>> of a master template whenever the options A B C are selected. >>> >>> Can I do that, and if so how? >>> >>> I have spent all day looking at ZPT references and have no idea if >>> what I'd like to do is possible. >> >> >> You don't have to involve macros:: >> >> <div>I'm a header</div> >> >> <p tal:condition="exists:context/stxfile" >> tal:replace="structure context/stxfile/CookedBody"> >> This is sample page content >> </p> >> >> <div>I'm a footer</div> >> >> If 'stxfile' can be aquired, what it renders will be included as page >> structure. (You may need to use a different method one the end of the >> path to render the object; for Documents, this is 'CookedBody'.) >> Otherwise, nothing will be rendered, though you could add a block >> with the oposite condition to supply a default action. > > > > Is 'stxfile' the actual filename? I'm not concerned about it being > structured initially - just want to see it working in principle with > any file containg some text. It's the name of an object. I made up this name for your "structure text file, in each of the folders A B C". You may call it as you will. Note: there is no such thing as a "file" in the ZODB. Everything is an object. This is how "content" is viewed. One thing I forgot to mention: you would apply this template (say it's named 'special_view') to your folders, like: http://localhost/A/special_view http://localhost/B/special_view http://localhost/C/special_view Now, if we used a template like this (let's name it 'direct_view'):: <div>I'm a header</div> <p tal:replace="structure context/CookedBody"> This is sample page content </p> <div>I'm a footer</div> we could apply it like so:: http://localhost/A/stxfile/direct_view http://localhost/B/stxfile/direct_view http://localhost/C/stxfile/direct_view This is a much more typical pattern, at least for content. If you want to apply a wrapper to page templates, then you use macros. --jcc -- "Building Websites with Plone" http://plonebook.packtpub.com/ Enfold Systems, LLC http://www.enfoldsystems.com

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accessing session data error
by Leticia Larrosa 22 Jun '05

22 Jun '05

Hi all: I think that I found a ZOPE bug. Is really very important for me know what can I do for avoid it. The first 9 steps are to recreate the situation and the other steps are to provoke the error. Step 1: Crate a folder called "reproducingError" in Zope Interface Manage Step 2: create a page template called "index_html" in the "reproducingError" folder with the following content: "  <form name="form1" method="post" action="reproducingError/init"> <input type="text" name="user"> <input type="submit" name="Submit" value="Submit"> </form> " Step 3: create a python script called "init" in the "reproducingError" folder with the following content: " # init script sessionData = container.REQUEST.SESSION sessionData.set("userId", container.REQUEST.user) return context.init2_html() " Step 4: create a page template called "init2_html" in the "reproducingError" folder with the following content: "  <a href="init2">passing face 2</a> " Step 5: create a python script called "init2" in the "reproducingError" folder with the following content: " # init2 script request = context.REQUEST sessionData = request.SESSION sessionData.set('idService', 'testService') context.first() return context.external(context) " Step 6: create a page template called "first_html" in the "reproducingError" folder with the following content: " First Response " Step 7: create a python script called "first" in the "reproducingError" folder with the following content: " # first script response = container.REQUEST.RESPONSE str = container.first_html() response.write(str) response.flush() " Step 8: create an external method called "external" in the "reproducingError" folder with the following content, in where the function of the external method is "communicationResponse" and the module is any name that you give to the file: " # external method import time def communicationResponse(context): response = context.REQUEST.RESPONSE sessionData = context.REQUEST.SESSION strDetailEnd = "<script>window.location='reproducingError/end'</script>" for item in range(1, 40): time.sleep(3) response.write("Response iteration:" + str(item)) response.flush() response.write(strDetailEnd) response.flush() " Step 9: create a python script called "end" in the "reproducingError" folder with the following content: " # end script idService = context.REQUEST.SESSION['idService'] return "Fin - " + idService " Step 10: open two explorer in wich call the object "reproducingError" (Example: localhost:8080/reproducingError) Step 11: enter an example text in each one. Step 12: clink in the link of one of them, and 5 second later clink on the link of the other explorer. The waiting for around 5 second is necesary because with other time interval not allways get the error. Stpe 13: and wait the "Response iteration"... Please if the error don't appear in any of the pages, begins at Step 9 again. and try to count to 5 witch other velocity :) The correct result is: " Fin - testService " The error is: " Site Error An error was encountered while publishing this resource. Error Type: KeyError Error Value: 'idService' " The traceback: " Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Shared.DC.Scripts.Bindings, line 306, in __call__ Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec Module Products.PythonScripts.PythonScript, line 323, in _exec Module None, line 2, in end - <PythonScript at /approach/reproducingError/end> - Line 2 Module AccessControl.ZopeGuards, line 67, in guarded_getitem Module Products.Transience.TransientObject, line 176, in __getitem__ KeyError: 'idService' " I will appreciate if you try until the error appear, because I not always obtain the error. I thinks that it is bacause the time interval between the two request. A curious thing is that when I obtain the error, if I wait around 15 second and refresh the page in wich i obtain the error, the correct result appear.. and no errors come. Sorry for the extended message, but I need any help that you can give me, because this describe error environment imitate a funcionality that I must give in a system very import that i'm doing. I'm using Zope 2.7.6 for Windows. Thanks in advanced. Leticia

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RE: [Zope] Traversal question
by Pascal Peregrina 22 Jun '05

22 Jun '05

Traversal is not meant to have pretty urls. To do such, I would either : - add a Site Access Rule in the root folder that would rewrite the url from the "nice" form to the physical location of the script and add the parameters to the request object. - use Apache in front of Zope and some mod_rewrite magic Pascal -----Original Message----- From: zope-bounces(a)zope.org [mailto:zope-bounces@zope.org]On Behalf Of Jonathan Sent: 22 June 2005 16:15 To: David Pratt Cc: zope(a)zope.org Subject: Re: [Zope] Traversal question ----- Original Message ----- From: "David Pratt" <fairwinds(a)eastlink.ca> >I have gone over the zope book to see what I can do about calling a sql >with a form and getting three additional parameters in the request and am >wanting this to get better looking urls that calling the parameters >directly in the url. I asked a similar question yesterday but perhaps it >was not clear enough about what asking. It is really a traversal question >and how to string together a sql query with a zpt form that also requires >parameters from the request namespace. > > I can call my zsql method and then my edit form like this: > /employee_by_id/employee_id/42/employee_edit_form > > or with simple direct traversal on the zsql method: > /employee_by_id/42/employee_edit_form > > Problem is I need three other parameters in the request for my edit form > to satisfy my sorting so when the edit form returns it is back on the > same batch page > > Parameters passed in traversal go into the request namespace according to > the zope book so was hoping for something similar to this which doesn't > work - and I can't see how it could. > > /employee_by_id/employee_id/42/employee_edit_form/start/2/sort/ > employee/reverse/0 > > The zope book examples are with python scripts so am not sure whether > this is possible with a ZPT that also requires parameters from the > request or will I need a script to be called in the path somewhere to > pick up the results of the query and then pass parameters to the form - > something like: > > /employee_by_id/employee_id/42/some_other_script/start/2/sort/employee/ > reverse/0/employee_edit_form > > where some_other_script would be a script python. Any hints to help me > understand what can be done with traversal like this would be appreciated > since I would rather have nice urls instead of stringing parameters > directly in the url with all the ?= and &'s. I am sure you don't want to hear this, but that's what '? = &' are for. If you really want to make your life complicated you could look into storing the parameters in cookies or session data, but those are pretty ugly work-arounds just so you can have pretty urls. Jonathan _______________________________________________ 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 ) ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com **********************************************************************

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Re: [Zope] Newbie Questions - many-many relationships? Zope 2 or 3?
by Andreas Pakulat 22 Jun '05

22 Jun '05

On 22.Jun 2005 - 12:04:02, Jim Vine wrote: > > On 21.Jun 2005 - 21:59:41, Jim Vine wrote: > > > Say, for example that my Zope App in some way has > > a > > > "House" object, which records the address, the > > owner, > > > and a short description. Later on, I may wish to > > add > > > further fields to record, say, the number of > > bedrooms, > > > but the system is already in use - if I've > > developed > > > in the ZMI, will this make it harder to make an > > > upgrade? > > > > Such a change might not be a problem using ZMI, as > > you can freely add > > properties to any object. You'd have to supply the > > data for all existing > > objects though (but you'd need to do that when using > > a product too). > > > > OK, so there are (at least) three ways of doing things > in Zope: > > 1. Using the ZMI to build an application using > standard objects (classes) > 2. Creating new classes to use in your app through the > ZMI. > 3. Creating new classes to use in your app in Python. > > Most of the Zope Book concentrates on method 1, and > the "Extending Zope" chapter is about method 2 - it > mentions method 3, but says that it's beyond the scope > of the book. See the Zope Developers Guide for a first glance at method 3. > get my head around the implications of selecting > method 2 or 3. Am I right in thinking that either of > these will result in my building a "Product"? No, method 2 aka ZClasses don't involve producing a Product. But there were issues in the past with ZClasses AFAIK. So it might be better to stay away from them. On the other hand quite a bunch of people reading here are using them for their apps... > If I want to add extra feature to my product on the development server > and then port them to the live server (with all the data on the live > server being left in tact), will selection of either of these > particularly help or hinder me in this? Hmm, my knowlegde of ZClasses is somewhat limited (as I found writing a pyhton product easier - but then I am a programmer...), so I can only tell you what product based apps have there. Adding new class members is easy and running instances catch those up. Adding new properties in such a class works too. Changing the name of properties isn't that easy, you'd have to write a conversion function or script that runs over all the instances and takes the value of the old property and put's it into the new name. Adding an instance variable will also not influence your existing instances. Andreas -- It's a very *__UN*lucky week in which to be took dead. -- Churchy La Femme

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ZPT tutorial
by John Poltorak 22 Jun '05

22 Jun '05

Does a ZPT tutorial exist anywhere? -- John

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automagic reindexing of objects
by Jürgen Herrmann 22 Jun '05

22 Jun '05

hi all! i make heavy use of indexes in my extension classes. these all inherit from catalogpathaware, so i have to call object.reindex_object() on each changed instance. calling it from attribute getters/setters f.ex. is not a good idea, because changing 3 attributes will reindex the object 3 times. what i'd like to have is that such objects are reindexed automatically before comitting a transaction. is it possible? where should i start looking in the source, is there possibly a before_transaction_commit hook? regards, juergen herrmann _______________________________________________________________________ >> XLhost.de - eXperts in Linux hosting << Juergen Herrmann Weiherweg 10, 93051 Regensburg, Germany Fon: +49 (0)700 XLHOSTDE [0700 95467833] Fax: +49 (0)721 151 463027 ICQ: 27139974 - IRC: #XLhost@quakenet WEB: http://www.XLhost.de

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