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Guf beta3
by Stuart 'Zen' Bishop 30 Nov '99

30 Nov '99

http://www.zope.org/Members/Zen/GenericUserFolder Changes include: Removal of most of the caching (this was going to be fix, but it doesn't speed things up that much it seems - can be reinserted at a later date) Addition of a new hook (docLoginSuccess), a useful place to initialize your session product and to work around Wierd Arsed Authentication Issue (tm). And incase you want information displayed on successful login. Link to the nifty how-to by Richard Taylor which saves me having to write one :-) Fix of all Outstanding Issues [1]. [1] ie. those emails I havn't lost. This is still beta, please don't run on production sites just yet. <dtml-kiss type=wetsloppy>This beta is dedicated to the implementer of ZClasses, who just saved me a hell of a lot of time.</dtml-kiss> -- ___ // Zen (alias Stuart Bishop) Work: zen(a)cs.rmit.edu.au // E N Senior Systems Alchemist Play: zen(a)shangri-la.dropbear.id.au //__ Computer Science, RMIT WWW: http://www.cs.rmit.edu.au/~zen

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ZOPE and my domain
by Ken Crismon 30 Nov '99

30 Nov '99

To All, I have a project I am working on that I need some Zope experts advice on. Understand that I am a Zope novice. I have got it up and running but have no idea where to start. I have also started getting smarter from a Python perspective. Well here is the question. I was privy to a presentation on Zope several months ago that was given to the Front Range Object Study Group (FROST). I am now in a position where I need essentially an application server. It is essentially a work flow automation system that during the course of the work flow we must pull data from various disparate data sources, publish data to other data sources and update several flat file systems and wrap the whole shooting match inside of a transaction or as much of it as we can!!! Several options come to mind but none except Zope makes me feel good. Option One: Install NT with Microsoft Transaction Server, write a bunch of ASP pages with ActiveX components that do all of the work. The MTS will manage the transaction as long as I write the guts of the rollback and commit for the flat file updates! Con: Its Microsoft and buggy and usually slow!!! Option two: Purchase Sybase's Jaguar Component Transaction Server and write the whole shooting match as a bunch of Java components and rely on Jaguar to manage the transaction in much the same way MTS does. Con: I worked as a developer on this project for Sybase. It is less than stable even in its fourth release!!! Option three: Purchase IBM's WebSphere app server, write everything in Java and run it like Jaguar. Con: Really new to the market and 100% Java so I am worried about performance!! Option four: Install ZOPE coupled with Apache or possibly the built in ZOPE web server. Here I am confused as to whether Zope can do the transaction management. Con: Don't know if it will provide the functionality I require!! Can Zope coupled with Apache and Python do what I need? Thanks for the help, Ken Crismon MapQuest

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RE: Exposing COM via XML-RPC or Something Else
by Brian Lloyd 30 Nov '99

30 Nov '99

> I'm playing around with a way to expose Windows COM object via > XML-RPC (or something else). > > Let me explain: > > My first thought was to write an XML-RPC API to expose the MAPI COM > object and it's methods. > ... > So my current question, can anyone think of an existing technology or > library that will allow me to expose these COM objects in a way that > could be used by other platforms/languages. Corba (FNORB), ILU, PYRO? > > Or am I really just going a little crazy? You might want to take a look at MS' SOAP (Simple Object Access Protocol) spec - it's not fully baked yet, but it basically takes xml-rpc several steps further, allowing you to communicate with SOAP-enabled objects (COM or otherwise) using XML over HTTP. We in Zope-land are keeping a close eye on this, as publishing objects via HTTP is the core idea of Zope already. Once the SOAP spec is fleshed out enough to implement in Python, it will probably be laugably easy not only to implement SOAP objects in Python but also to wrap most any existing COM objects as SOAP-aware objects. If you're interested, the current spec is at: http://msdn.microsoft.com/workshop/xml/general/soaptemplate.asp Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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SOLVED: Using recursion with a SQL method
by Jim Cain 30 Nov '99

30 Nov '99

I finally figured this out for myself. Apparently something like: <dtml-var "some_object(parameter_name=value)"> results in a namespace stack in some_object that has *only* parameter_name defined, and no other namespaces may be accessed. As a result, using this for recursion fails. The solution was to call some_object this way instead: <dtml-with "_.namespace(parameter_name=value)"> <dtml-var some_object> </dtml-with> This creates a new namspace on the stack with the proper value of parameter_name, but other namespaces, including the one containing other Zope objects, are still accessible. An alternative method is: <dtml-call "REQUEST.set('parameter_name', value)"> <dtml-var some_object> but this is slightly different in that parameter_name is now defined within the scope of the object calling some_object, not just during the call to some_object. It seems that I'm finally getting the hang of the namespace stack. It is similar to dictionaries in PostScript, from what I can remember of them. If I have explained something incorrectly, I would appreciate being enlightened. :-) Cheers, Jim ---Original Message--- All, I have a MySQL table "category" with the following schema: id number name char parent_id number The table is self-referencing in that the parent_id points back to an ID. This structure renders a hierarchical listing of categories, with the root categories having a parent_id of -1. I have a SQL method to select category names and IDs by their parent ID: ID: Query_category_by_parid Arguments: parent_id:required:int Query: select id, name from category where <dtml-sqltest parent_id type=int> order by name I have a DTML method which calls itself recursively to find a list of categories starting with the specified parent: ID: list_categories <dtml-in "Query_category_by_parid(parent_id=parent_id)"> <p><dtml-var name> (<dtml-var id>)</p> <dtml-var "list_categories(parent_id=id)"> </dtml-in> This however, doesn't work. It appears that the second call to Query_category_by_parid, within the second call to list_categories, fails. Here is the URL: /list_categories?parent_id=-1 This is the error I receive: Error Type: NameError Error Value: Query_category_by_parid And here is the traceback: [snip] I have a feeling I'm missing something obvious, such as a problem with the namespaces. Any help would be greatly appreciated. Cheers, Jim

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RE: [Zope-dev] automatically doing a Catalog search as part of ob ject traversal...
by Michel Pelletier 30 Nov '99

30 Nov '99

> -----Original Message----- > From: Anthony Baxter [mailto:anthony@interlink.com.au] > Sent: Tuesday, November 30, 1999 1:19 AM > To: zope-dev(a)zope.org > Subject: [Zope-dev] automatically doing a Catalog search as part of > object traversal... > > > Say I have a catalog HelpCatalog, with a bunch of documents that have > unique IDs. I want to be able to do something like > HelpCatalog/by-id/SomeUniqueID > and have it return the document SomeUniqueID. > > Do Catalogs support any sort of Direct Traversal like this? No but it's not a bad idea. > Or am I going > to have to do it myself with a mixin class? You could allways submit a patch. ;) Note that ZTopics, in a way, does this genericly, it executes canned queries based on traversal, it might need to be fondled a bit to get it to do exactly this however. -Michel

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Sorting on multiple values?
by Benno Rice 30 Nov '99

30 Nov '99

I've got a bunch of objects that are ZCataloged and I want to get a list back that's sorted on more than one of the indexes. Is this doable? I'm not averse to using dtml-in to do some of the sorting, I'd just like to know if there's a simple way of doing it before I go charging off to do it in python. -- Benno Rice "No, no. We're *sweet* and XNFP Aries Dark Subculture- *innocent* evil bastards." friendly Internet Geek benno(a)netizen.com.au "Defend your joy"

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Re: [Zope-dev] automatically doing a Catalog search as part of ob ject traversal...
by Anthony Baxter 30 Nov '99

30 Nov '99

>>> Toby Dickenson wrote > > Say I have a catalog HelpCatalog, with a bunch of documents that have > > unique IDs. I want to be able to do something like > > HelpCatalog/by-id/SomeUniqueID > > and have it return the document SomeUniqueID. > > I looked at doing something like this just after the release of 2.0, but ran > across a problem. Catalog.getobject calls HTTPRequest.resolve_url, which > starts its resolving process from REQUEST.PARENTS[0]. > I could get around this problem by storing the ids, and performing the > search on demand. This worked for me since I wanted the searched-for > objects to be parameters to the request. I will not quite work for you since > you want the request to be handled by the searched-for object. I'm getting there - I've now got a dtml-tree populated from a Catalog (I'm using a PythonMethod in there, which is cheating, I guess :) > > Do Catalogs support any sort of Direct Traversal like this? > > Or am I going > > to have to do it myself with a mixin class? > > oh yes. That's 'oh yes, I'm going to have to do it with a mixin'? Hm, wonder what happens when I traverse across a pythonmethod... Anthony

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RE: [Zope-dev] automatically doing a Catalog search as part of ob ject traversal...
by Toby Dickenson 30 Nov '99

30 Nov '99

> -----Original Message----- > From: Anthony Baxter [mailto:anthony@interlink.com.au] > Sent: 30 November 1999 06:19 > To: zope-dev(a)zope.org > Subject: [Zope-dev] automatically doing a Catalog search as part of > object traversal... > > > Say I have a catalog HelpCatalog, with a bunch of documents that have > unique IDs. I want to be able to do something like > HelpCatalog/by-id/SomeUniqueID > and have it return the document SomeUniqueID. I looked at doing something like this just after the release of 2.0, but ran across a problem. Catalog.getobject calls HTTPRequest.resolve_url, which starts its resolving process from REQUEST.PARENTS[0]. However REQUEST.PARENTS is not available until after the original url traversal is complete, therefore it is not possible to use ZCatalog.getobject (or resolve_url) as part of url traversal. (actually, REQUEST.PARENTS is available, however its elements are in a reversed order). I could get around this problem by storing the ids, and performing the search on demand. This worked for me since I wanted the searched-for objects to be parameters to the request. I will not quite work for you since you want the request to be handled by the searched-for object. > Do Catalogs support any sort of Direct Traversal like this? > Or am I going > to have to do it myself with a mixin class? oh yes.

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Zope directory path + modif control panel
by Stefan Langerman 30 Nov '99

30 Nov '99

Hi, How can I, from a python module, know the absolute path of the main zope directory? Is there a variable that contains it? or a method that returns it? Also (I asked that before, but got no answer) is it possible to add an entry to the control panel? (at the same level as "DB Management", "Version Management", "Product Management") Thanks a lot, Stefan.

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[Fwd: first disregarding and then complaining about missing </noframes>]
by Hannu Krosing 30 Nov '99

30 Nov '99

After playing with tidy from w3.org I complained to them about an issue with zope's management frameset page and this is what I got back.

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