August 1999 - Zope-Dev

FW: Can Zope be used for database forms type applications?
by Neil.Smith＠aucs-europe.com 05 Aug '99

05 Aug '99

>I have started to read about Zope, and am in the process of setting up a >server to try it out. From what I have read so far, it seems mainly targeted >at displaying dynamic content. Can it also be used to generate web apps for >maintaining database content? If so, can anyone recommend a site where there >is a demo or tutorial or any other good information relevant to this. If it >isn't suitable, can anyone recommend any other good tools (either opensource >or commercial). > >Thanks > >Neil >

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Re: [Zope-dev] FW: Can Zope be used for database forms type applications?
by Anthony Baxter 05 Aug '99

05 Aug '99

>>> Neil.Smith(a)aucs-europe.com wrote >I have started to read about Zope, and am in the process of setting up a >server to try it out. From what I have read so far, it seems mainly targeted >at displaying dynamic content. Can it also be used to generate web apps for >maintaining database content? If so, can anyone recommend a site where there >is a demo or tutorial or any other good information relevant to this. If it >isn't suitable, can anyone recommend any other good tools (either opensource >or commercial). Zope is _outstanding_ for maintaining database content. I'm mid-way through building a quite large and complex database application (a customer database) which uses Zope as the frontend, and an SQL database or two as the backend. It's not something that I can show outside, unfortunately, but it makes heavy use of Zope's SQL interfacing abilities... Anthony (ob-zope-dev: oracle's SQL features a neat feature allowing you to automatically traverse parent/child object trees - this allows you to do some incredibly cool stuff. look for select... connect by... in the docs.)

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Re: [Zope-dev] PyGreSQL DA: help testing
by Ross J. Reedstrom 05 Aug '99

05 Aug '99

Zopistas: I've been doing a little testing, and it looks like my TM integration isn't quite there yet :-( I threw an error in the backend by putting a typo in an ZSQL method (I did it on purpose... right ;-) This threw an error, all right, and the backend was in a transaction, but it never saw an abort. So, it looks like I need to dig into the TM machinery a bit more: my self._abort() isn't getting called when I throw an error inside the db.py itself. Any hints on what I need to be doing? (RTFS and a pointer to the right S would be fine ;-) Ross -- Ross J. Reedstrom, Ph.D., <reedstrm(a)rice.edu> NSBRI Research Scientist/Programmer Computer and Information Technology Institute Rice University, 6100 S. Main St., Houston, TX 77005

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monitor server vs zpasswd
by Robin Becker 05 Aug '99

05 Aug '99

the monitor_client_win32 fails to connect to the server if zpasswd is used to make an encrypted password. -- Robin Becker

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Re: [Zope-dev] the birth of ZCommerce
by Josh Zeidner 05 Aug '99

05 Aug '99

> >I'll be out of town this week but when I get back I'll attempt to post an >API spec for this kind of thing. I already have some of it done. It calls >for a series of base objects, etc... One thing I definatly need to do is >digest ZClasses and how they can play with the system. > A few things to add... 1) For the product data to exist in an exterior accounting system, there must still be a way to easily associate images or other data with the exterior data. How will this be accomplished? 2) Maybe we should agree on an accounting system to implement the API in ( Beachtree seems like a likely candidate ). 3) Can we set up some way to easily share info( using Zope I would imagine ) for this project? - jmz _______________________________________________________________ Get Free Email and Do More On The Web. Visit http://www.msn.com

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CatalogAware must come before ObjectManager
by Kevin Dangoor 05 Aug '99

05 Aug '99

I don't know if this is a bug, or simply a function of how things work... but it appears that a ZClass must list CatalogAware as a base class before ObjectManager if you wish the CatalogAware functionality to be there. If this is expected behavior, then this should probably be documented... BTW, will it ever be possible to change the Base classes of a ZClass? Kevin

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Re: [Zope-dev] the birth of ZCommerce
by Christopher Petrilli 05 Aug '99

05 Aug '99

> Until there is an open-source accounting package, this should not be the > only option. It should be a option. I do not want to have to depend on a > proprietary accounting program to store my products in, even if does run on > Unix. Or perhpas the accounting package may not be designed for this kind > of thing. So the design should be such that it also allows the inventory to > be stored in ZODB3 or in an SQL database. Realistically, 99.999999999% of business run on either proprietary systems that they created, or some form of COTS product. In many cases it can be a *substantial* investment. I know at least 2 companies who have deployed ERP solutions from SAP that have total deployment costs in the $10-20M range. And these are not that unusual. What I would recommend is to take a very "pluggable" approach. Create methods which access data (inventory, etc), and simply allow people to over-ride those as necessary to integrate. As for serious accounting data, this is a good use for XML. Chris -- | Christopher Petrilli Python Powered Digital Creations, Inc. | petrilli(a)digicool.com http://www.digicool.com

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Question about using CatalogAware
by Kevin Dangoor 04 Aug '99

04 Aug '99

Greetings, I've got a ZClass with ObjectManager and CatalogAware as base classes (in that order). I'd like to make a DTML Method (in the ZClass) that searches the catalog. Here's the method: <dtml-call "REQUEST.set('topurl', PARENTS[0].absolute_url())"> <dtml-if "category == 'top'"> <dtml-call "REQUEST.set('searchfor', {'metatype' : 'KMArticle', 'top' : 'on', 'current' : 'on'})"> <dtml-else> <dtml-call "REQUEST.set('searchfor', {'metatype' : 'KMArticle', 'category' : category, 'current' : 'on'})"> </dtml-if> <dtml-in "_[default_catalog](searchfor)" sort=score> <dtml-if "release.isPast()"> <dtml-var list_item> <dtml-else> <dtml-if sequence-start> <dtml-call "REQUEST.set('nofirst', 1)"> </dtml-if> </dtml-if> </dtml-in> And I get the following error: Error Type: AttributeError Error Value: no __call__ method defined >From the traceback: (Object: _[default_catalog](searchfor)) File <string>, line 0, in ? AttributeError: (see above) A test DTML Method showed me that default_catalog = 'Catalog'. I have a ZCatalog called 'Catalog' in the Zope root. Since the ZClass is an Object Manager, the Method is one level down and will have to acquire the catalog. If I replace "_[default_catalog](searchfor)" with "Catalog(searchfor)", the method works. Any ideas what I'm doing wrong? Thanks, Kevin

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Re: [Zope-dev] Question about using CatalogAware
by Kevin Dangoor 04 Aug '99

04 Aug '99

-----Original Message----- From: Anthony Baxter <anthony(a)interlink.com.au> To: Kevin Dangoor <kid(a)kendermedia.com> Cc: zope-dev(a)zope.org <zope-dev(a)zope.org> Date: Wednesday, August 04, 1999 6:48 PM Subject: Re: [Zope-dev] Question about using CatalogAware >>>> "Kevin Dangoor" wrote >> A test DTML Method showed me that default_catalog = 'Catalog'. I have a >> ZCatalog called 'Catalog' in the Zope root. Since the ZClass is an Object >> Manager, the Method is one level down and will have to acquire the catalog. >> >> If I replace "_[default_catalog](searchfor)" with "Catalog(searchfor)", the >> method works. > >what about "_[_[default_catalog]](searchfor)" ? > >If I understand your mail correctly, default_catalog is set to the _string_ >'Catalog' - you need to look up the value of the string to get the object... That's why I thought that my syntax was correct... _[default_catalog] should look up 'Catalog' in the namespace. If I had said _['default_catalog'], that would've returned 'Catalog'. _[_[default_catalog]] actually tries to use the catalog object itself as a key in the namespace (and yields a "bad argument to internal function" error). Kevin

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Re: [Zope-dev] Question about using CatalogAware
by Anthony Baxter 04 Aug '99

04 Aug '99

>>> "Kevin Dangoor" wrote > A test DTML Method showed me that default_catalog = 'Catalog'. I have a > ZCatalog called 'Catalog' in the Zope root. Since the ZClass is an Object > Manager, the Method is one level down and will have to acquire the catalog. > > If I replace "_[default_catalog](searchfor)" with "Catalog(searchfor)", the > method works. what about "_[_[default_catalog]](searchfor)" ? If I understand your mail correctly, default_catalog is set to the _string_ 'Catalog' - you need to look up the value of the string to get the object... Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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