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Inaugural Zope 3 Mini-Newsletter
by Gary Poster 21 Oct '02

21 Oct '02

WELCOME TO THE ZOPE 3 MINI-NEWSLETTER Find out what's going on in Zope 3 development, then contribute your opinions, your experience, and your code to one of the most exciting Open Source projects going. Most news is submitted. Tell us what you're doing! Send anything from a sentence to a few paragraphs about your latest efforts, be they code, documentation, research, or design, to gary(a)zope.com. We'll send one of these out whenever we have enough to warrant it-- just two or three submissions are enough--and I'll also specifically request news from the zope3-dev(a)zope.org group once a month. The newsletter begins with a high-level glossary that might help you understand a bit about what's going on with some of the announcements. Want to help others get a grasp on your favorite Zope 3 (or Zope 2) concept? Send in a definition, or request one, or fix these. LITE 'N' EASY GLOSSARY: Starred items have definitions also in the glossary Event Service: An internal system (not intended to be external) that can send events to interested object subscribers. I18N: a W3C standard for internationalization; includes Unicode. See http://www.w3.org/International/ ObjectHub: A way to assign an object's path in the *ZODB* to an integer unique to that hub instance. Thanks to the *Event Service*, the ObjectHub can maintain the integer-to-object-path relationship even if the object moves...theoretically. First we need some something to send the appropriate events! Persistent: the base class that makes it possible for an object to be stored (mostly) transparently in the *ZODB* Relation Manager: A central place to store relationships between objects, giving some very simple and basic relational-database-like functionality. A client of the *ObjectHub*. ZCML: Zope Configuration Meta Language. The XML language that is the file-system configuration tool for site administrators. One uses it to declare new Zope 3 products, new services, new views, and so on. ZODB: Zope Object DataBase. A way to store Python objects persistently; an underlying technology of Zope 2 and 3, but also available in a stand-alone distribution. NEWS SNIPPETS: * First edition of the Zope 3 newsletter! Thanks to the Melbourne OzZope interest group (http://www.ozzope.org/) for the idea. * Thoughts on improving I18N internationalization support: see http://dev.zope.org/Members/nheiich/drafts/z3_i18n_d1 * Jim Fulton requests thought on CMF Content Type vs. Zope 3 Interfaces vs. ??? in preparation for the SPRINTATHON in Rotterdam, Dec 2-6: see http://lists.zope.org/pipermail/zope3-dev/2002-October/002988.html * A Zope 3 alpha by end of 2002? Wiki vs. PEP? Find this and more at http://lists.zope.org/pipermail/zope3-dev/2002-October/002960.html PYTHONLABS' JEREMY HYLTON: Persistence Improvements We've been making some improvements to the core persistence implementation and trying to make persistent modules and classes usable. The Persistent base class is now used for regular persistent objects and for custom C types like BTrees. It only provides an __dict__ for instances of the type if the most derived type is a new-style class that does not use __slots__. (Objects with __slots__ aren't supported yet, but they probably will be in the future.) This change allowed us to remove lots of C code. Unfortunately, it requires a custom metaclass to work with Python 2.2.1; in Python 2.3, the metaclass is just an alias for type, the default metaclass. Jim [Fulton] and I have done some minimal work to make persistent modules usable in Zope3. You can create modules through the web using the service manager -- one of those places where you get lots of funny ++ stuff in the URLs. When the modules are updated, the function and classes are updated in place. The code and interfaces are still pretty rough; I'm still learning how the feature will be used and expect to make improvements based on experience. R. DAVID MURRAY: Zope Configuration Meta Language (ZCML) Improvements and Automated Documentation I'm currently working in rdmurray-metameta-branch on a set of changes to the configuration system. The changes allow reconfiguration of configuration directives, including the metaconfiguration directives. I then use this to change the meta-config directives to support additional attributes and subdirectives so that the basic documentation for configuration directives can be specified in the meta.zcml files. I'm currently working on the program that extracts this data and builds the namespaces.zope.org subdirectory hierarchy in doc. GARY POSTER: New Placeful ObjectHub, Relation Manager Proposal I took advantage of some significant flight time (and jet-lagged insomnia) to work on items centering around the ObjectHub. I'm trying to get some consensus before I check anything in, but hope to get something in this weekend. I am particularly excited about the Relation Manager--thanks to Andy Bulka for pointing out his pattern and discussions at http://www.atug.com/andypatterns/RM.htm that explore some of the implications, problems, and promises of some very similar approaches. I also stole the name from him (I did shorten it a bit). ;-) STEVE ALEXANDER: Aiding, Abetting, Speaking, Organising After an absence of several weeks, I've been getting back into the world of Zope 3. I've been working with CodeWorks in Lithuania, helping them with their work on CacheManagers, organising a Sprint here in Vilnius, and reviewing Gary's recent work on the ObjectHub and RDM's improvements to documenting the meta-directive files. A couple of weeks ago, I gave a talk on Zope 3 at the Universite de Savoie at Chambery, France. The slides are available on their webpages somewhere, and consisted of Jim's OSCOM talk, and some discussion of Zope 3 security, stitched together with my thoughts on the benefits of component software, and how it allows for interesting economic patterns between collaborating companies. The Sprint will be in Vilnius from Tuesday 10 December to Thursday 12 December. As well as myself, Albertas, Marius, Vika and Brad from CodeWorks, and Jim from Zope Corp are definitely attending. There's still room for some more sprinters! NEWS CONTRIBUTION GUIDELINES: We want to know what you're doing, be it code or design, so just write something quick and easy. First person and casual is fine, as you can see. Send to gary(a)zope.com whenever the spirit moves you. LEARN MORE ABOUT ZOPE 3: See http://lists.zope.org/mailman/listinfo/zope3-dev See http://dev.zope.org/Wikis/DevSite/Projects/ComponentArchitecture/FrontPage but be aware the design docs often lag as we develop prototypes.

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Rescheduling of Xron Methods
by Florian Reiser 21 Oct '02

21 Oct '02

Hi folks, I have installed Xron to do some recurring tasks automatically. However the Xron DTML Methods is not rescheduled, but only executed once. The source code of the DTML Method is: Content-type: text/plain <dtml-call "Control_Panel.Database.manage_full_sweep(0,_.None)"> How can I achieve that the method is rescheduled? I want it rescheduled every 5 minutes. BTW the frequency is set to 5 minutes! Regards Florian Reiser

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Sorting objectValues in Python Script
by Andreas Tille 21 Oct '02

21 Oct '02

Hello, I just want to build a sorted list of list = context.objectValues('ExtFile') for file in list: print file.id, file.title return printed or in other words just the equivalent to the following dtml-code <dtml-in expr="objectValues('ExtFile')" sort="id" reverse> <dtml-var id> <dtml-var title> </dtml-in> Any idea to perform this. Kind regards Andreas.

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tal:condition AND
by Mark Gibson 21 Oct '02

21 Oct '02

I can do: tal:condition="exists:date_edited" and I can do: tal:condition="hasThePermision" I can even do: tal:condition="date_edited | hasThePermission" but how do I do tal:condition="date_edited AND hasThePermission" Given that date_edited may not exist in the namespace, using python has it's own unique problems. The following errors if date_edited isn't found. tal:condition="python:hasThePermission and date_edited" Is there an easy way to do this test in one statement? Mark

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Zope Contractor Wanted
by Wayne Connolly 21 Oct '02

21 Oct '02

I am just about to begin work on several large websites and will not be able to complete all the work unless I can outsource some components. You will be granted access(Manager & Owner) to our live Zope dev server to complete your components. A skeletal working system will be documented and functional, including all design templates(in ZPT), as will database connectivity and db schema. You will not have access to FreeBSD/Apache server running zope. You will be provided with english documentation detailing exact requirements however input/criticism will be listened to. I will pay the lucky winner in $US via paypal or direct into your account if you require. I dont care where you are located however melbourne would be highly benificial. You should be intimately familiar with Zope Product creation and python scripting not to mention all normal zope functions including eCommerce. Hand-holding will hopefully be minimal as my time will be taken up performing simlar tasks in addition to all business requirements. If you do a good job I will definately send more work through in the future without posting to this board. Please send your zope resume including any examples and your expected flat rate in $. Cheers, Wayne

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Python script upon authentication
by Brian Sullivan 20 Oct '02

20 Oct '02

I would like be able to run a python script upon authentication ( basically whenever the user has to supply a user name and password) to do some logging and housekeeping chores -- is this possible? Any clues where to look for strategies/code?

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Newsletter abgemeldet
by nonprofit.de newsletter 20 Oct '02

20 Oct '02

Herr Zope Zope Ihre E-Mail-Adresse zope(a)zope.org wurde in unseren Verteiler gelöscht. Anmelden können Sie sich unter http://www.nonprofit.de/newsletter/abo.asp

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putting file into just created directory
by Jorg E. Rødsjø 20 Oct '02

20 Oct '02

I have a document which looks like this : <dtml-call expr="photoArchive.manage_addFolder(id=photo_title, title='')"> <dtml-call expr="photoArchive.[photo_title].manage_addImage(id='', title=photo_title, file=file)"> Which gets called with photo_title, id and file as arguments. In the second call I want to add the image to the newly created folder, but I have found that just using the photo_title argument does not do it. The brackets[] are not in the code, just to highlight what does not work. Any suggestions would be highly appreciated. -jorg

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Zope 2.6.0 Released
by Matthew T. Kromer 20 Oct '02

20 Oct '02

Zope 2.6.0 Released Zope 2.6.0 represents the first Zope release formed with a large number of community contributions. You may download Zope 2.6.0 from Zope.org: http://www.zope.org/Products/Zope/2.6.0/ Users of the Zope source release should note that Python 2.1.3 is now the required platform. Python 2.1.3 includes a fix to an issue that could cause crashes in Zope. Particular features of interest in Zope 2.6.0: - Gzip content compression when serving pages - ZCTextIndex plug-in index - Signal Handling and Log Rotation - Addition of a new default view setting ability - New profiling abilities - Improved daemon mode - Enhanced text indexing - Improved object cache control - Automatic browser ID string embedding in URLs - Automatic quoting of form variables implicitly retrieved from REQUEST but not REQUEST.form - Major improvments to BTree and Catalog code - i18n translation support for TAL - Bugfixes for Colletor issues 61, 72, 79, 117, 144, 151, 160, 178, 186, 196, 238, 271, 272, 292, 304, 358, 372, 402, 411, 412, 421, 433, 437, 446, 448, 454, 458, 465, 478, 510, 512, 516, 517, 525, 528, 538, 539, 541, 547, 550, 573, 574, 580, 581, 583, 586, 603, 605, 612 - Linux binary build includes Python 2.1.3 with Large File Support enabled compiled against glibc-2.1.3 - Solaris binary build includes Python 2.1.3 with Large File Support enabled compiled against Solaris 8 For more information on what is new in this release, see the CHANGES.txt and HISTORY.txt files for the release: - http://www.zope.org/Products/Zope/2.6.0/CHANGES.txt - http://www.zope.org/Products/Zope/2.6.0/HISTORY.txt For more information on the available Zope releases, guidance for selecting the right distribution and installation instructions, please see: http://www.zope.org/Documentation/Misc/InstallingZope.html -- Matt Kromer Zope Corporation http://www.zope.com/

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Chandler - Open Source Mega-PIM
by Alastair Burt 20 Oct '02

20 Oct '02

I have just seen a reference to the Mitch Kapor's new venture. As I have not so far seen it mentioned on the Zope or Python lists, I thought I would post the info here. The venture is the building of an open-source Outlook killer from scratch. More info here: http://www.osafoundation.org/index.htm http://blogs.osafoundation.org/mitch/ Little seems fixed at the moment, but they seem to be committed to Python, ZODB and wxPython. I guess that they are not considerting using Zope directly, or they would have put it in the list of technology, but if this flies, it will have a major effect on the Zope world, I think -- not least on the cataloguing side of things. The planned features are: * POP/IMAP retrieval * HTML viewing and composition * auto-completion of addressees * stationery * signatures * multiple profiles/personalities/identities * spelling checker * auto-archiving of old mail * fast searching via full-text indexing * importing existing data and settings * in-line viewing of attachments * user-defined views, rules, and filters * user-scripting capabilities * "active" mail - mail with buttons for actions * transparent encryption and authentication of mail * automatic Spam filtering * filing of messages in multiple folders Information Sharing & Exchange * integrated Instant Messaging and presence management (Jabber) * sending contacts and appointments via mail (iCal, vCard support) * remote peer-to-peer browsing of others' data * flexible security model to control access * file and document sharing * remote queries, e.g., look up address in another person's contact list * automatic updating of information from remote sources: receive new contacts, changes to existing contacts automatically (publish-subscribe) Access * home and work PC's with complete automatic replication of data * online or offline use with access to all data * synchronize with popular PDA's Calendar * day/week/month views * recurring appointments * see another person's free/busy blocks for scheduling * see another person's calendars as overlays Other * simple Web-style navigation (back, forward, and home buttons, single click on a link to navigate, bookmarks, URL references to user data) * easily customizable user-defined categories * structure data how you like it, view it that way, change your mind at any time * automatic recognition of names, places, dates, and etc.; automatic categorization of items * developer extensibility architecture --- Alastair

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