June 2003 - Zope - Zope lists

onchange events
by garry saddington 12 Jun '03

12 Jun '03

How could a DTML method or python script be fired from the onchange event of a selection list in a form. thanks garry

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Unicode strings and search
by Vladimir Petrovic 12 Jun '03

12 Jun '03

Dear all, In the zope application I'm developing I'm using unicode strings that contain non-latin1 characters. I've solved "standard" problems with conversion exceptions from/to unicode in the way that is described in previous messages in the list (I've also used setdefaultencoding ('utf-8') since all of the non-unicode strings are in this format). However, regarding the full text search, situation looks more complicated: (1) "Old" Zope Text Index. This index works properly when UnicodeSpliter is used. Unicode properties are indexed, and it is possible to query with star. (for instance: searchResults ( {'ind':'_.unicode ('<alpha>*', 'utf-8')}) works properly. (2) ZCTextIndex. As far as I played with it, it doesn't have unicode splitter. The two splitters I've tried don't work with non-latin1 characters. Lexicon will not even show correct number of words - not-latin1 words are ignored. (3) TextIndexNG (1.09). This index properly divided text in words. However, querying the index with * doesn't produce results if non-latin1 character is used. Querying full words works: - searchResults ({'ind':_.unicode ('a*', 'utf-8')}) - works - searchResults ({'ind':_.unicode ('<alpha><alpha>', 'utf-8')}) - works - searchResults ({'ind':_.unicode ('<alpha>*, 'utf-8')}) - doesn't work. I want to use one of the newer text indexes because of the capabilities they provide. However, I can only make the old index works with unicode text. Does anybody have an idea how can I make (2) or (3) work with arbitrary unicode text. Thanks in advance, Vladimir

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Non-bloating counter/access logger solution
by Wankyu Choi 12 Jun '03

12 Jun '03

Hi all, I know the topic has been discussed a lot but I found little help so far. I want to implement a simple counter or a complete access logger for ZOPE objects. Here are my (and many others') problems regarding this: - ZODB bloats. Whenever the value of a counter property gets updated, the host object is copied doubling its size. - Too many read/write conflicts. No matter how little traffic you expect, you get tons of read/write conflict errors. I thought about saving counter values/logs in an external storage like a MySQL table or an external file in order to dupe ZODB into thinking no change has been made to the object in question. But that doesn't seem so elegant and generic. Please share your ideas resolving this issue. I have yet to study the internals of ZODB, but can't it have a way to update only the designated properties of a persistent object? If not possible, why? ( to avoid bloating ZODB ) Committing a whole object when its access log gets updated lead to excessive conflict errors. By updating only the counter property, for example, the odds of having conflicts would decrease to a substantial degree. Best regards, Wankyu Choi --------------------------------------------------------------- Wankyu Choi CEO/President NeoQuest Communications, Inc. http://www.zoper.net http://www.neoboard.net ---------------------------------------------------------------

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Zope 3 newsletter 8th edition
by Gary Poster 12 Jun '03

12 Jun '03

WELCOME TO THE ZOPE 3 NEWSLETTER: ISSUE 8 (12 JUNE 2003) Welcome to the eighth Zope 3 newsletter. Information about Zope 3 and newsletter contributions and suggestions can be found at the bottom of this newsletter. GLOSSARY FOR THE UNINITIATED Encounter a term in this newsletter you don't know? Try this glossary: http://dev.zope.org/Zope3/NewsletterGlossary NEWS SNIPPETS: - Jim Fulton plans to lead a sprint in Fredericksburg, VA, in the Zope Corporation offices, June 21-23. Spaces are still available. See http://dev.zope.org/Zope3/Fredericksburg2003Sprint2 for more information. - A number of talented Zope 3 developers are sprinting prior to EuroPython in Louvain-la-Neuve, Belgium, June 22-24. See http://dev.zope.org/Zope3/EuroPython2003Sprint for more information. - Jim Fulton plans for a Zope 3 beta for end of June. - Jim Fulton is also scheduled to lead a sprint in Melbourne, Australia, July 9-13. Spaces are still available. See http://www.ozzope.org/OzSprintWiki for more information. - Note that some people's reports below have an "Older News" section: blame it on the newsletter editor. We haven't had a newsletter since March 25. SATHYA RANGASWAMY (ZEOMEGA): i18n conversion ZeOmega is converting all ZPTs and string constants in the Zope 3 application subdirectory (zope.app) to make them i18n aware. GUIDO VAN ROSSUM (PYTHONLABS, ZOPE CORP): Filesystem Synchronization This feature (abbreviated "fssync") lets you create a representation of a subtree of a Zope 3 server's object space on the filesystem, edit the files on the filesystem, and push them back to the server. There is a command line utility which works somewhat like CVS that manages synchronization between filesystem and server. The filesystem representation of common objects is natural and easy to edit: folders map to directories, page templates map to files containing the text of the page template, and so on. Unrecognized objects are represented as a blob of XML. The command line utility is the script src/zope/fssync/main.py; invoke it without arguments to get help. The README.txt file in the same directory has more project information, and links to Wiki pages. It is possible to synchronize part of the site manager subtree (/++etc++site/) as well; the next stage of the project will be to extend the fssync machinery to allow installing and managing site management bundles (the envisioned primary mechanism for distributing Zope 3 software). STEPHAN RICHTER (IUVENO): Internationalization The Pre-PyCon sprint was a great success! We got almost all tasks required for the Zope X3 release done. Page Templates are correctly hooked up to the Translation Services, the user's Locale is available in the request, translation of Python code is possible, the JobBoardI18n demo is updated and translation extraction tools have been written. The only tasks left to do is to implement the I18n support for ZCML, internationalize Zope 3 and translate it to a couple of languages. For a complete summary see http://dev.zope.org/Zope3/PyConSprint. Documentation I am working heavily these days on the Zope 3 Cookbook to provide some extensive and narrative documentation by example. All of the 10 introduction chapters have been outlined and some recipes have been written. I am working currently on a section that builds a Message Board application from scratch. The cookbook can be found at http://dev.zope.org/Zope3/DevelCookbook and the example code is accessable via http://cvs.zope.org/Products3/demo/messageboard/. The book's content is currently placed under the Open Publication License. I recently had another Wiki cleanup session. The Wiki pages look pretty good at this point and most FrontPage linked pages are up-to-date. I am also pretty confident about pages having status badges, though there needs to be more work done in this area. For details see http://mail.zope.org/pipermail/zope3-dev/2003-June/007246.html SQL TALES Expressions This is a little product that adds another TALES expression to page templates. SQL expressions allow you to write SQL statements in your page templates directly without the need for creating new SQL Scripts, connection services and database adapters. The used database can be either specified with a connection object name or by directly specifying the RDB DA and the DSM. Example:: <html tal:define="rdb string:psycopgda; dsn string:dbi://test"> <body> <ul> <li tal:repeat="contact sql: SELECT * FROM contact"> <b tal:content="contact/name" /> </li> </ul> </body> </html> Thanks goes to Alan Runyaga, who tickled the idea out of me. He was looking for allowing Zope to be more similar to PHP and other inline scripting tools, since they are more familiar to the Web scripter and therefore easier to learn. Link: http://cvs.zope.org/Products3/sqlexpr/ ZWiki for Zope 3 I have rently ported the core functionality of ZWiki to Zope 3. Thanks goes to Simon Michael for his help. ZWiki for Zope 3 supports Plain Text, STX and ReST as input types, can mail modification notification, and has parenting support. For more details see http://dev.zope.org/Zope3/ZwikiForZope3 On this page you will also find link to three very positive reviews about the product! ALBERTAS AGEJEVAS, MARIUS GEDMINAS (CODEWORKS): Mailing service Lately, we've been working on the transactionally-safe mailing service. It's not yet there, but expect it in HEAD soon. As an off-shoot of this project, Marius has written a proposal for a nice API for creating RFC822 messages, which would take care of things like MIME attachments and proper encoding of Unicode data. Authenticated user names in logs Albertas has traced and added a minor feature which was missing: authenticated user names in the HTTP access logs. Need to know what the users are doing! <wink> Decorators (see also Steve's entry below) Marius has been pairing with Steve implementing decorators, but that's a separate story; besides, it was more than two weeks ago. Older news from Marius (April 16) One thing worth attention is the new functional testing framework. Functional tests can test large parts of the system as a whole by simulating the publication process in an automated way. One of the immediate merits of the functional test suite is that errors in ZCML files will be immediately noticed. If you're interested, you can find the documentation in doc/FTEST.txt in your Zope 3 source tree, and the FunctionalTestingFramework page of the Zope 3 wiki. Albertas and I have also been working on virtual hosting. It is now basically working in conjunction with Apache rewrite rules. We have already deployed it on some of our production systems. There are still some rough edges, e.g. the Javascript tree in the ZMI is not yet aware of virtual hosting. More details can be found on the VirtualHosting page of the Zope 3 wiki. BTW virtual hosting has full functional tests. ;-) One of the things we use virtual hosting for is a product I've written called z3checkins. It displays a list of the most recent changes made to the Zope 3 CVS repository, and you can add it to your Mozilla sidebar. Check it out at http://www.codeworks.lt/zope3-checkins . If you like it, thank Steve Alexander for the idea. STEVE ALEXANDER (CODEWORKS): Decorators With help from Marius, I implemented a prototype of Decorators. Later, Jim and I simplified Decorators and implemented them. Decorators are specific kinds of Context Wrapper that you use to separate the conetext-specific implementation of a some content from the plain ole' Python implementation. So, a Folder class implements basic folder functionality, and its decorator, ZopeContainerDecorator handles context-wrapping, sending events, calling hooks such as the 'afterAddHook', and that kind of thing. In practical terms, you no longer have to adapt a container to IZopeContainer before using it. The equivalent behaviour with a decorator now happens automatically when the container gets context-wrapped. There's some preliminary documentation in src/zope/app/context.txt. __implements__ to implements With help from Philipp von Weitershausen, I converted almost all (about 350) of the uses of __implements__ in the Zope 3 code the new implements(...) syntax. In a lot of cases, the implements declaration was made shorter, or could be removed altogether. Context Wrappers Jim and I reworked context wrappers a bit, breaking out zope-specific functionality in to a separate subclass in zope.app.context. I also removed the ContextAware base class because it had unpredictable and implicit side-effects, which broke some xml code Martijn Faassen had just checked into CVS under Products3. Sorry Martijn! Shortly after, I wrote a new ContextAware base class that works in a more explicit and predictable way. Easier unit tests for local (placeful) components Jim refactored the PlacefulSetup code for writing unit tests. This made writing location-dependent tests much less painful. Event service bug I fixed a subtle persistence related bug in the event service. Kudos to Marcus J. Ertl for tracking the bug down. Older news from Steve (April 8): I rewrote in C the ContextWrapper code that was in Python. This resulted in much simpler wrapper code in Python. Now the unit tests run somewhere between 10% and 15% faster. CHRISTIAN THEUNE (GOCEPT): Open source certification There has been a meeting with the TUEV-IT which is a German institution that is able to issue common criteria certificates. There is a sponsorship by the Mitcon GmbH who pays the fees for a EAL-1 certification which makes Zope 3 the world's first certified open source product. The certification is in preparation and there will be a workshop in July where the first documents are drafted together with the TUEV and our people, who include Aroldo Souza-Leite, Steve Alexander, some other people and me. If you want to know more about the certification please see http://www.commoncriteria.org Stay zoped! GARY POSTER (ZOPE CORPORATION): Zope 3 plus Zope 2 I have been working on integrating Zope 3 with Zope 2 on a Zope Corporation customer project. The project leverages ZCML to only load the parts of Zope 3 pertinent to the project. Jim Fulton hopes to leverage this experience for a Zope 2 release in the fall of this year that incorporates Zope 3. CONTRIBUTING Please send Zope 3 news, and newsletter suggestions and requests, to gary(a)zope.com, with "Zope 3 newsletter" somewhere in the subject line. As you can see above, casual and quick news items are acceptable and even desirable. MORE INFORMATION ON ZOPE 3 The central place to find Zope 3 information is currently http://dev.zope.org/Zope3 The Zope 3 mailing list is archived and managed at http://lists.zope.org/mailman/listinfo/zope3-dev The Zope 3 development IRC channel, #zope3-dev at irc.openprojects.net is (strictly) for discussion of Zope 3 development issues. Newsletters are archived at http://dev.zope.org/Zope3/Zope3Newsletter

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exUserFolder Integration in Site
by Andreas Pakulat 12 Jun '03

12 Jun '03

Hi, my site uses only PageTemplates, but I need XUF. The problem for me is that I don't know how to get the login form of XUF integrate into my site. I tried to convert the DTML-Method to ZPT, but that doesn't work :( Here is what I hav as ZPT: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  <html metal:use-macro="here/std_template/macros/page"> <span metal:fill-slot="body"> <div align="center"> <span tal:condition="exists:request/authFailedCode"> <span tal:define="dummy python:here.REQUEST.set('loginTitle', acl_users.getAuthFailedMessage(here.REQUEST.get('authFailedCode')))"></span> </span> <span tal:condition="not:exists:request/authFailedCode"> <span tal:define="dummy python:here.REQUEST.set('loginTitle', 'Login Required')"></span> </span> <h1 class="SeitenTitel">Log In</h1> <form action="index_html" tal:attributes="action request/destination" METHOD="POST"> <TABLE> <TR> <TD ALIGN="LEFT" VALIGN="TOP"> <STRONG>Name</STRONG> </TD> <TD ALIGN="LEFT" VALIGN="TOP"> <INPUT TYPE="TEXT" NAME="__ac_name" SIZE="20"> </TD> </TR> <TR> <TD ALIGN="LEFT" VALIGN="TOP"> <STRONG>Password</STRONG> </TD> <TD ALIGN="LEFT" VALIGN="TOP"> <INPUT TYPE="PASSWORD" NAME="__ac_password" SIZE="20"> </TD> </TR> <TR> <TD ALIGN="LEFT" VALIGN="TOP"> </TD> </TR> </TABLE> <center> <INPUT TYPE="SUBMIT" NAME="submit" VALUE=" Ok "> </center> </FORM> </div> </span> </html> The macro creates header and footer of the page, I really don't know why this doesn't work - I remain Anonymous User after submitting the form. I also thought about getting the rendered dtml-login-form into a ZPT, but I don't know how :( If somebody knows how... Andreas -- You will have domestic happiness and faithful friends.

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exUserFolder and Properties of Users
by Andreas Pakulat 12 Jun '03

12 Jun '03

Hi, I started to use exUserFolder for my site and got a problem with the Properties of Users. I use ZoDB auth Source and ZoDBProperties Source. My question is how to access the Realname and email and phone numbers I can type in the "Add User" form? I already looked a bit through the python code, but did not find something that helped me. Andreas -- You will be singled out for promotion in your work.

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Help with String conversion in Zope
by enrica dente 12 Jun '03

12 Jun '03

Dear all, I have a problem checking if an input from a form is a string or not and then change it into a float. The Zope code I have written is as follows but it does not work. <dtml-if expr="same_type(standardkit_cost, 'Test')"> <dtml-call "REQUEST.set ('standardkit_cost', _.float(standardkit_cost))"> </dtml-if> Thanks, Enrica _________________________________________________________________ Stay in touch with absent friends - get MSN Messenger http://www.msn.co.uk/messenger

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access to other zope objects in __setstate__
by Sylvain Thénault 12 Jun '03

12 Jun '03

hello ! Almost everything is in the subject: i would like to access to a portal tool in the __setstate__ method for an object, but it seems that when this method is called 'self' isn't the acquisition wrapper, so I get an AttributeError. What's the good place to access to other zope objects when an instance is loaded ? TIA -- Sylvain Thénault LOGILAB, Paris (France). http://www.logilab.com http://www.logilab.fr http://www.logilab.org

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RE: [Zope] Help with String conversion in Zope
by McDonnell, Larry 12 Jun '03

12 Jun '03

Hi, I have set some these conversions in python [dtml] <dtml-call "string_to_float(input_string ,REQUEST)"> [python] Parameter List x,y # Example code: # Import a standard function, and get the HTML request and response objects. from Products.PythonScripts.standard import html_quote request = container.REQUEST RESPONSE = request.RESPONSE y=float(x) return request.set('y',y) [dtml] <dtml-call "REQUEST.set('conv_number', y)"> Hope this helps... -----Original Message----- From: enrica dente [mailto:enrica_dente@hotmail.com] Sent: Thursday, June 12, 2003 9:00 AM To: zodb-dev(a)zope.org; zope-it(a)zope.org; help(a)zope.org; Zope(a)zope.org Subject: [Zope] Help with String conversion in Zope Dear all, I have a problem checking if an input from a form is a string or not and then change it into a float. The Zope code I have written is as follows but it does not work. <dtml-if expr="same_type(standardkit_cost, 'Test')"> <dtml-call "REQUEST.set ('standardkit_cost', _.float(standardkit_cost))"> </dtml-if> Thanks, Enrica _________________________________________________________________ Stay in touch with absent friends - get MSN Messenger http://www.msn.co.uk/messenger _______________________________________________ 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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html_quote in Python script
by Thierry FLORAC 12 Jun '03

12 Jun '03

Hi, Is it possible, and how, to mimmic the "<dtml-var ... html_quote>" statement in a Python script using "print ..." ?? Thanks, Thierry -- Linux every day, keeps Dr Watson away... http://gpc.sourceforge.net -- http://www.ulthar.net

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