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Feedback wanted on Zope/CMF/Plone product developing - you might really want to read this;-)
by Wankyu Choi 11 Dec '02

11 Dec '02

Hi everyone, **READABILITY ALERT: text too long** **NEWBIE ALERT: New to Python/Zope/CMF/Plone. Please bear with my ignorance.** First, appologies sorry for cross postng, but I needed to access wider audience for feedback. I hope this will be my last shot at clearing up any doubts about the way I'm developing Zope/CMF/Plone products. Please enlighten me if I'm wrong. First, a bit of background why I'm posting this. I have a set of three products finished just a few hours ago: NeoBoard 1.1b1, NeoPortal Library, and NeoPortal Content Pak. NeoPortal Library NeoPortal Library is a collection of base modules on which to build sophisticated Zope/CMF/Plone products such as NeoBoard. NeoBoard NeoBoard is a threaded message board ( http://www.neoboard.net ). There's a HUGE gap between 1.0x versions and 1.1a, and another QUANTUM LEAP between the last 1.1a2 and soon-to-be-released 1.1b1. Most of its core features have been refactored into NeoPortal Library. NB supports stock Zope and CMF, and Plone. Works the same with or without CMF or Plone. NeoPortal Content Pak NeoPortal Content Pak is a collection of CMFPlone content types. It's dependent on Plone but I wouldn't call it Plone product since I don't fully follow the Plone developing guides. With NCP comes NeoPortal Document, NP File, NP Image, NP External File, NP Article, NP Link, NP Media, NP Container/Element pairs ( eg. NeoPortal Aritlce is a container and NeoPortal Page Element or Image Element type is an element ), plus all their advanced counterparts that offer additional features: DTML handling for example. As of 0.9a, NPC has 20 or so new content types and a couple of NeoPortal content-specific tools. NCP is an add-on to CMFPlone. Some common features include (every feature can be toggled on and off either in a site-wide or individual manner):: - backtalk like inline commenting ( factored out from NeoBoard ) - automatic conversion of textual notations into icons ( emoticons, for example ) - OLE-like object embedding ( one object can embed another; changes in embedded objects are automtically updated in embedding objects, etc ); even inline comments can embed and render other objects; NeoPortal object embedding follows the rules of acquisition - element-type-aware Containers like NeoPortal Article/Advanced Article ( automatic renumbering/navigation: you get your sequenceable photo albums in a second, for example ) - external data access ( External File and ExternalAccess tool - the tool supports filesystem access only as of 0.9a ; will support MySQL, etc; - a whole directory ( and its subdirectories ) of files on the server can be imported into corresponding NeoPortal External Files - individual content-rating and daily access logging ( IP-based and purgeable by specific interval of days ) - a new discussion tool for new content-types ( creates a NeoBoard instance when discussion is enabled ); you get everything NeoBoard offers for content discussion - site-wide configuration and instance-specific configuration that can override the former - togglable IP-based spam-blocking ( one can't comment on an article twice in less than 10 seconds, for example, to prevent malicious duplicate postings ).... to name a few (that's quite a few;-). NeoBoard comes with the same set of bells and whistles since it's basically a NeoPortal Element container and its articles/attachments are NeoPortal Elements, you get the idea. Need Your Help/Feedback Now here's what I'm not sure about. 1. Some fear granting users filesystem accesss is a real bad idea. You can specify file bases (/home/ZopeHome/archives, for example) NeoPortal External Files validate against given an absolute filepath at the time of their instantiatioin raising error if a user tries to go up the file bases. That's the solution I came up for filesystem security. NeoPortal Content Pak currently allows users with AddPortalContent permissions to use this mass-importing features from a given directory: one can FTP his files to one of the allowed directoy bases and import them into NeoPortal External Files in one go. If you import a set of images into a NeoPortal Article ( a NeoPortal container) , that is your auto-navigatable photo album, for example. In fact, I have tons of audio files that should be imported into my own Zope server to serve up our users. That's why I created the feature. Am I missing anything here? 2. The new discussion tool appends a acquisition-wrapped discussion board ( np_neoboard.__of__( self ) ) to instances as a normal property so that a board can be attachable to a non-folderish object (guess that's how it works with CMF anyway). Works just fine, but again... am I missing something? 3. Might be simple but haven't been able to find answers: how do I go about i18n'ing Zope internal messages like you do with ZPT's i18n tags? Every NeoPortal classes use a message-manipulating method to spew out warnings, errors, user messages, etc. The method just returns back the given messages as of now. I want this method to return i18n'd messages. Might be a stupid newbie question... but can you give me some pointers? 4. NeoPortal Library uses the 'email' package from Python 2.2. Just put the entire package into the NeoPortal Library package directory and it works just fine. I need this package to handle UNICODE mime headers. This is where my another python newbie question comes in: I have 'tests' directory under the NeoPortal directory: ./NeoPortalLibrary ./email ./tests NP_Mailer, a unicode-aware emailer class, works wonderfully but only the test modules in the 'tests' directory can't import email's Header class. I guess I'm pretty ignorant of python importing rules. If I move test modules into ./NeoPortalLibrary, all the tests go smoothly. I had to append 'Products.NeoPortalLibrary.email' to every import statement in the package. Please enlighten me on this one. 5. This might be a Plone-specific question but, Plone's master .po file has some multiline msgstr definitions that kill poEdit and Localizer when importing the file. For example: #: from plone_templates/sendto_template.pt msgid "mailtemplate_sendto_body" msgstr "This link is sent to you from ${portal_url}" " " "You are receiving this mail because someone read a page at" "${portal_title}" "and thought it might interest you." " " "It is sent by ${name} with the following comment:" "${comment}" " " "${document_title}" " " "${document_description}" " " "${document_url}" 6. One of the most difficult tasks I faced up to while developing Zope products is dealing with Zope security machinery. I use three computers when developing in Zope: a Linux server, a win2k where I write code with Manager role (everthing works security-wise), another win2k with Anonymous/Authenticated role. Also use the VerboseSecurity product to track down vague security errors. Any hints, tips or pitfalls or whatever would be greatly appreciated on this Zope security topic. In a word, how you guys test security handling of your products? And any ideas on testing it in unittests? 7. Access logging/readcounting would bloat ZODB unless version-less/non-undoable storages are used...right? How serious would it be if I use stock ZOPE filesystem storage? In my production envirionment, I have 300,000 users with tons of data. Any hints? How about the Directory Storage? 8. I defined a new set of formatting rules to render Structured Text. This might be a bad idea, but need these new rules for my users. Suppose you want to add a new rule to ST, how would you go about it? In my case, I just hacked it away:-( 9. I use 'guarded_getattr' instead of '_getViewFor' to get specific skins. For example, NeoBoard can work as a pure Zope product, in which case, I can't assume there'll be '_getViewFor'. Please warn me if I need additional 'guarding'. 10. I override the '_setObject' method in NeoPortalElementContainer class to allow id's that conform to a defined format: page_1, page_2, table_1, image_2 etc. Id validatioin can be skipped by setting 'no_id_check' argument and all. Element renumbering is done by calling 'resetElementNumbers' method, which, in turn, calls 'manage_renameObjects' for renumbering. I also override this 'manage_renameObjects' so that it calls '_setOb' instead of '_setObject'; otherwise I fall into a visious circle of '_setObject' calling 'resetElementNumbers' recursively. Anything I should be aware of in this regard? 11. FINALLY, NeoPortal Content Pak comes with two pairs of types: normal types for memebers and advanced types for Mangers/Reviewers. How do I filter out these content types based on permissions? I posted a question about this one a while ago, but none of the suggested solutions worked. Calling 'ContentInit' twice cancels out the first call, least in ZMI. Works okay in a CMF/Plone site. I also want Element types to appear only in a container object: page elements, image elemnts showing up only in an article container, for example. Can't find any solution for this. (Whew... are you still with me? God, thanks.) I plan to release NeoPortal Library, NeoBoard 1.1b1 and NeoPortal Content Pak by the end of this week unless I find **really serious** flaws thanks to YOUR feedback. Thanks in advance. Best Regards, Wankyu Choi --------------------------------------------------------------- To the dedicated staff at NeoQuest, language is not a problem to be dealt with, but an art waiting to be performed. --------------------------------------------------------------- Wankyou Choi CEO/President NeoQuest Communications, Inc. 3rd Floor, HMC Bldg., 730-14, Yoksam-dong, Kangnam-gu Seoul, Korea Tel: 82-2 - 501 - 7124 Fax: 82-2-501-7058 Corporate Home: http://www.neoqst.com Personal Home: http://www.neoboard.net e-mail: wankyu(a)neoqst.com ---------------------------------------------------------------

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AdaptableStorage status update
by Shane Hathaway 11 Dec '02

11 Dec '02

I've been holding off status updates on the AdaptableStorage project until I could say I'm confident that the approach will work and it's easy enough to write your own serialization components. After numerous refactorings, I'm pleased to say that it actually works and does everything I hoped! AdaptableStorage lets you store ZODB objects in your own database and in your format, *without* using special content classes. You can use a filesystem directory, a relational database, or whatever kind of database you might have as a ZODB. This is very different from all previous solutions. LocalFS, ExtFile, CMF directory views, and other similar products require you to use special content classes that store themselves outside the ZODB. OracleStorage and CVSFile store all objects as pickles. Other solutions have similar issues. AdaptableStorage, however, reuses as much of ZODB as possible to achieve orthogonal persistence to arbitrary databases and formats. This is only a status report, not an announcement that it's finished, so the documentation is not done yet. But there are interfaces, unit tests, and a basic diagram. You can use DBTab to mount an AdaptableStorage instance. As a test, I have successfully used AdaptableStorage to create a CMF site on both the filesystem and in a Postgres database. Here's a way to get a preview. (It may not work in MS Windows yet.) Get a very recent version of Zope 2.6 (or perhaps even the HEAD). Then check out AdaptableStorage and DBTab from CVS: cvs -d :pserver:anonymous@cvs.zope.org:/cvs-repository co Products/AdaptableStorage cvs -d :pserver:anonymous@cvs.zope.org:/cvs-repository co Products/DBTab Move the two products to the Products directory of your Zope instance. Create a dbtab.conf file in your <Zope> directory with the following: [Storage: FS] type=Zope2FSStorage basepath=%(CLIENT_HOME)s/myfs volatile=1 [Database: FS] class=Zope2FSDatabase mount_paths=/fs auto_create=1 Don't forget to create the directory "myfs" like this: mkdir var/myfs Start Zope and choose "Add DBTab Mount Point" in the management UI. You should get a checkbox next to the "/fs" mount. Create that mount point. Now visit /fs and add stuff. Watch var/myfs/fs, which will contain all the objects you create. You can't yet copy/paste, import, or export, but you can add just about any kind of object. The files under var/myfs/fs currently contain pickles, but that's only because AdaptableStorage doesn't have a mapper registered for most kinds of objects and it falls back to the default mappers. But AdaptableStorage does know about Folders and it creates a directory for them. It also works the other way around: if you create a directory on the filesystem, you'll see it in Zope as a Folder. If you're adventurous, you can also set up a SQL connection using psycopg and the following dbtab.conf entries: [Storage: Postgres] type=Zope2SQLStorage params= table_prefix=zodb volatile=1 [Database: Postgres] class=Zope2SQLDatabase mount_paths=/sql auto_create=1 You might observe that it's a little less responsive than regular ZODB. Edit dbtab.conf, changing "volatile=1" to "volatile=0", to get the full benefits of the ZODB cache. The downside is that changes you make on the filesystem won't be reflected immediately, but in a lot of environments, that is acceptable. The AdaptableStorage I presented at the O'Reilly Open Source conference was specific to Zope 2. This version is not. In fact, most of it isn't even specific to ZODB. Its core is a general serialization framework with pattern names drawn from Martin Fowler's book. Let me know if you run into troubles. I've been testing it with the Zope HEAD on Python 2.2.2. This is the product of many months of inspiration and perspiration. :-) It's not perfect, but the basic concepts and interfaces are in good shape. Comments welcome. Shane

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ZODB3 3.1.1b1
by Jeremy Hylton 10 Dec '02

10 Dec '02

We have made a beta release of ZODB 3.1.1 and ZEO 2.0.1. The primary change is a fix that allows transactions with multiple databases to run without deadlock. These release will correspond exactly to Zope 2.6.1b1, which will also be released today. See http://www.zope.org/Products/StandaloneZODB http://www.zope.org/Products/ZEO Zope developers who have written customer data managers (aka _p_jars) should be sure to test this release. The deadlock prevention code changes the order in which data managers are invokved and prevents new data managers from registering after a transaction has begun. I've include the summary of changes below. Jeremy What's new in ZODB3 3.1.1? ========================== Release date: 10-Dev-2002 It was possible for earlier versions of ZODB to deadlock when using multiple storages. If multiple transactions committed concurrently and both transactions involved two or more shared storages, deadlock was possible. This problem has been fixed by introducing a sortKey() method to the transaction and storage APIs that is used to define an ordering on transaction participants. This solution will prevent deadlocks provided that all transaction participants that use locks define a valid sortKey() method. A warning is raised if a participant does not define sortKey(). For backwards compatibility, BaseStorage provides a sortKey() that uses __name__. Added code to ThreadedAsync/LoopCallback.py to work around a bug in asyncore.py: a handled signal can cause unwanted reads to happen. A bug in FileStorage related to object uncreation was fixed. If an a transaction that created an object was undone, FileStorage could write a bogus data record header that could lead to strange errors if the object was loaded. An attempt to load an uncreated object now raises KeyError, as expected. The restore() implementation in FileStorage wrote incorrect backpointers for a few corner cases involving versions and undo. It also failed if the backpointer pointed to a record that was before the pack time. These specific bugs have been fixed and new test cases were added to cover them. A bug was fixed in conflict resolution that raised a NameError when a class involved in a conflict could not be loaded. The bug did not affect correctness, but prevent ZODB from caching the fact that the class was unloadable. A related bug prevented spurious AttributeErrors when a class could not be loaded. It was also fixed. The script Tools/zeopack.py was fixed to work with ZEO 2. It was untested and had two silly bugs. Some C extensions included standard header files before including Python.h, which is not allowed. They now include Python.h first, which eliminates compiler warnings in certain configurations. ZEO 2.0.1 (2002/12/10) The changes since the ZEO 2.0 release are: - The logging code for client connection was improved in several ways. In particular, client connection and disconnection messages include the server's address. - ClientCache.py: make some functions into methods; include the storage name in all log messages; append the storage name to the trace filename. - zrpc/trigger.py: in handle_read() (both versions!), catch socket errors from the recv() call and return early in that case.

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python 2.1.3 on RedHat 8.0
by Adam Manock 10 Dec '02

10 Dec '02

I am working on spec/RPM for Zope 2.6.x, but obviously a working python2.1.3 install is a pre-req if I want to support RH8.0 with the Zope RPMS :-) Attached are the changes made to the spec so that the python 2.1.3 SRPM from python.org would --rebuild nicely on RedHat 8.0 Changes: Made tools optional Used "%{__prefix}/lib/python2.1/Tools" instead of tools.files for "tools" sub-package. Removed BuildPrereq for db1-devel. No longer included in RH8 (see: http://www.redhat.com/software/linux/technical/packages.html) I don't have a RH7.x box to test on anymore.. (should have kept one of my dev boxes at 7.x.......) could someone please test the below on RedHat 7.2 and/or 7.3? ------------------------------------------------- To build the source RPM as a NON ROOT user Create necessary directories in your home directory: mkdir $HOME/rpm mkdir $HOME/rpm/SOURCES mkdir $HOME/rpm/SPECS mkdir $HOME/rpm/BUILD mkdir $HOME/rpm/SRPMS mkdir $HOME/rpm/RPMS mkdir $HOME/rpm/RPMS/i386 Tell RPM to use your private rpm/ tree: echo "%_topdir $HOME/rpm" >> $HOME/.rpmmacros Install the source RPM: rpm -Uvh python2.1-2.1.3-1.src.rpm Patch the spec file cd $HOME/rpm/SPECS patch -p0 </path_to_attached/python2.1.spec.10-22.patch Build: rpmbuild -ba --without tkinter python-2.1.spec Install: su -l rpm -Uvh ~yourusername/rpm/RPMS/i386/python2.1*.rpm exit Test: python2.1 /usr/lib/python2.1/test/regrtest.py I got: 128 tests OK. 13 tests skipped: ------------------------------------------------- Adam

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Attempt to store an object from a foreign database connection?
by Stefan H. Holek 10 Dec '02

10 Dec '02

Hi All! My situation is this: When creating CPS sites I sometimes see one of the tracebacks appended below. In its factory method (manage_addCPSSite) CPS creates two External Methods (cpsinstall & cpsupdate) inside a fresh CMF portal, and then executes these. During execution cpsupdate imports some components from .zexp files into portal tools. What does it mean when "the connection" is "closed"? Where does the "foreign database connection" come from in the first place? Is it probably not a good idea to run External Methods from inside a factory method? I can not all too reliably reproduce this but what I do is constantly create and delete CPS sites as I am customizing the mentioned External Methods. I also noticed that after a restart it works for a while, and then suddenly starts bombing out (after approx. 2 minutes). Once it is broken the error persists and I have to restart to be able to add a CPS site again. Happens with Zope 2.5.1 and 2.6.0 on Mac OS X and GNU/Linux Any hints appreciated, Stefan -- 2002-12-09T17:02:13 ERROR(200) SiteError http://127.0.0.1:8084/manage_addProduct/NuxCPS/manage_addCPSSite Traceback (innermost last): Module ZPublisher.Publish, line 98, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Products.NuxCPS.CPSSite, line 79, in manage_addCPSSite Module Products.ExternalMethod.ExternalMethod, line 231, in __call__ - __traceback_info__: ((), {}, None) Module /Users/zope/w4/Products/NuxCPS/Extensions/cpsinstall.py, line 101, in cpsinstall Module ZODB.Connection, line 504, in setstate RuntimeError: Shouldn't load state for '\x00\x00\x00\x00\x00\x00\x1fa' when the connection is closed 2002-12-08T23:30:12 ERROR(200) SiteError http://127.0.0.1:8084/manage_addProduct/NuxCPS/manage_addCPSSite Traceback (innermost last): Module ZPublisher.Publish, line 98, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Products.NuxCPS.CPSSite, line 81, in manage_addCPSSite Module Products.ExternalMethod.ExternalMethod, line 231, in __call__ - __traceback_info__: ((), {'langs_list': None}, (None,)) Module /Users/zope/w4/Products/NuxCPS/Extensions/cpsinstall.py, line 665, in cpsupdate Module /Users/zope/w4/Products/NuxCPS/Extensions/cpsinstall.py, line 53, in tryimport Module OFS.ObjectManager, line 546, in _importObjectFromFile Module ZODB.ExportImport, line 79, in importFile Module ZODB.Transaction, line 222, in commit Module ZODB.Transaction, line 195, in commit Module ZODB.Transaction, line 256, in _commit_objects Module ZODB.Connection, line 387, in commit - __traceback_info__: (('Products.CMFCore.ActionsTool', 'ActionsTool'), '\x00\x00\x00\x00\x00\x00h\x11', '') InvalidObjectReference: Attempt to store an object from a foreign database connection 2002-12-09T00:24:58 ERROR(200) SiteError http://127.0.0.1:8084/manage_addProduct/NuxCPS/manage_addCPSSite Traceback (innermost last): Module ZPublisher.Publish, line 98, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Products.NuxCPS.CPSSite, line 81, in manage_addCPSSite Module Products.ExternalMethod.ExternalMethod, line 231, in __call__ - __traceback_info__: ((), {'langs_list': None}, (None,)) Module /Users/zope/w4/Products/NuxCPS/Extensions/cpsinstall.py, line 665, in cpsupdate Module /Users/zope/w4/Products/NuxCPS/Extensions/cpsinstall.py, line 53, in tryimport Module OFS.ObjectManager, line 546, in _importObjectFromFile Module ZODB.ExportImport, line 79, in importFile Module ZODB.Transaction, line 222, in commit Module ZODB.Transaction, line 195, in commit Module ZODB.Transaction, line 256, in _commit_objects Module ZODB.Connection, line 382, in commit - __traceback_info__: (('Products.CMFCore.ActionInformation', 'ActionInformation'), '\x00\x00\x00\x00\x00\x00\x97\xf3', '') Module ZODB.Connection, line 507, in setstate Module ZODB.TmpStore, line 49, in load Module ZODB.FileStorage, line 619, in load Module ZODB.FileStorage, line 593, in _load POSKeyError: 00000000000097f3 -- Those who write software only for pay should go hurt some other field. /Erik Naggum/

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slightly offtopic: Publish/Subscribe mechanisms and Zope.
by Phil Harris 08 Dec '02

08 Dec '02

All, Some time ago a Zope developer (a Zope Corp employee) contacted me with regards to my pyKnowNow microserver that allowed Python to be a fully fledged part of a KnowNow (http://developer.knownow.com) network. Since I can't remember who that was, typical, I'm posting this in the hope that it jogs a few memories. It may also be of interest to others :). The point of this mail is that a newish project on SourceForge, http://mod-pubsub.sf.net, is now available via cvs. This is basically a repackaging as opensource of an earlier, but it seems quite complete, version of KnowNow. The best part is that as well as the Apache Perl cgi based server there is also a complete alpha quality version of a server written in Python based on asyncore. This seems like a good opportunity to start looking at Zope and pubsub again. The mod_pubsub stuff also has a Javascript microserver. This has huge possibilities for interactive web apps, presence, instant messaging, chat, et al. I apologise if this is too far off topic but thought that people may be interested :). Phil Harris phil(a)harris-family.info

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Non Bloating Page Counter
by Brian R Brinegar 08 Dec '02

08 Dec '02

Hello, We've had requests from several of our users for the ability to have a drop in page counter within zope. However creating a page counter python script which increments some value in zope will bloat the ZODB. Solutions exist where values are stored on the file system or in a database. Unfortunately our users don't have file system access and it is unacceptable to expect them to request a database account and setup database connections and methods just to create a page counter. I would like to create a Page Counter product that doesn't bloat. If a product is created that doesn't subclass History or UndoSupport does it still bloat? Zope is transactional, but products like ZLDAPConnection have the ability to be "non-transactional" what does this mean? Could I use this in my counter? -Brian

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manage_roleForm (bug?)
by Brian R Brinegar 08 Dec '02

08 Dec '02

Okay, >From the manage_access screen in the ZMI I can click on a role to view the permissions assigned to that role. It was my assumption that this would show me the same information as if I had looked at the column of checkboxes below the selected Role. This is the case except for the Manager role. After some investigation I found that the manage_roleForm makes several calls which eventually end up calling the Permission.getRoles method. This method checks the object in question for a __roles__ attribute. If this attribute does not exist 'Manager' is returned. This causes several options to be selected on the manage_roleForm for Manager since quite a few products do not have the __roles__ attribute. Such products include Temporary Folders, parts of CMF, and ZWiki. Now, my question is if this is a bug within RoleManager or a bug within the individual products? Thanks, -Brian Brinegar ECN Web System Developer Purdue University West Lafayette, IN

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Zope Book call for assistance
by Chris McDonough 06 Dec '02

06 Dec '02

Hi, Time has rolled around for me to ask for assistance with editing the most recent edition of the Zope Book. A "2.6 edition" of the Zope Book exists at http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/index_html. It has many new chapters and a most existing chapters have been rewritten and extended. But it's not finished and I'd really like this Zope Book edition to be the "current" edition by the time Zope 2.6.1 comes out. If anyone has the time and inclination to edit and extend one of the following chapters of the 2.6 edition Zope Book, you will be rewarded with a glowing mention in the Preface of the book. If you professionally edit two chapters, you'll be considered a coauthor and your name will go on the header. That'd be nice on a resume, I'd imagine. Maintaining Zope: <http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/MaintainingZope… > Extending Zope (ZClasses): < http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/CustomZopeObjec… > Relational Database Connectivity: < http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/RelationalDatab… > Users and Security: < http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/Security.stx > Advanced DTML: < http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/AdvDTML.stx > Searching and Categorizing Content (ZCatalog): < http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/SearchingZCatal… > Advanced Zope Scripting: < http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/ScriptingZope.s… > "Editing and extending" these chapters means: - Downloading the source version of the chapter via the "STX source" link at the top of the page. - Addressing all the comments in the section (by deleting the extraneous ones and answering via narrative in the document the meaningful ones). - Extending the chapter based on your own personal experience. - Optionally re-screenshotting and renumbering the figures based on the format of the already re-screenshotted Basic Objects chapter (I can do this as well if you can't, as long as I know what needs to be done). - Sending the edited source back to me for inclusion into the Book. Thanks much! - C

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[DateIndex bug] catalog related, already post on collector
by Paolo Galati 06 Dec '02

06 Dec '02

Product DateIndex.py,v 1.7 2002/08/14 22:19:27 Using DateIndex on CMF1.3 An owerflow error is raised from DateIndex product on line 187 indexing the date fields of products deriving from DefaultDublinCoreImpl class. (almost all CMF products) 187: t_val = ( ( ( ( yr * 12 + mo ) * 31 + dy ) * 24 + hr ) * 60 + mn ) The t_val value exceed int limit (2147483647) because the DefaultDublinCoreImpl set, for object that never expire, the value: __CEILING_DATE = DateTime( 9999, 0 ). -- Paolo Galati - [ n o z e S.r.l. ] Via Giuntini, 25/29 - 56023 Navacchio - Cascina (PI) Tel +39 (0)50 754380 - Fax +39 (0)50 754381 mailto:paolomail@noze.it - http://www.noze.it

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