January 2000 - Zope - Zope lists

RE: [Zope] ZopePacks: A Proposal for a new Zope Product...
by Shaw, Mark 24 Jan '00

24 Jan '00

O.K. Sorry, wont happen again :( -Mark -----Original Message----- From: Jochen Haeberle [mailto:listen@MIDRAS.de] Sent: Saturday, January 22, 2000 9:23 AM To: Shaw, Mark; zope(a)zope.org Subject: RE: [Zope] ZopePacks: A Proposal for a new Zope Product... Hi Mark, please never ever post an attachment to a maillist. Most people - including me - are not interested in your file, you even don't know if Jim is... Please cut down your posts to a reasonable size as well. No need to send all that was said by others in the thread again without commenting on it. Jochen _______________________________________________ Zope maillist - Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )

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Adding ZClasses within ZClasses (more questions)
by James W. Howe 24 Jan '00

24 Jan '00

I've managed to successfully create an instance of a ZClass within another ZClass programatically. However, I'm not sure why what I did worked. I have a ZClass which has ObjectManager behavior. When I create an instance of this ZClass, I also want to create a DTMLMethod and another ZClass as contents of my outer ZClass. To create the DTMLMethod, I'm able to do the following in my ZClass1_add method: <dtml-call "manage_addDTMLMethod(...)"> This creates a new DTMLMethod as an item contained by my ZClass1 instance. If I try to add my ZClass2 using a similar method: <dtml-call "ZClass2_add(...)"> it ends up being put at the same level as my ZClass1 instance. However, if I do the following: <dtml-with "manage_addProduct['my product']"> <dtml-call "ZClass2_add(...)"> </dtml-with> my ZClass2 is added as an item contained by ZClass1. This raises a couple of questions. First, why does the manage_addDTMLMethod(...) work without any extra effort? What is it about manage_addDTMLMethod which knows that the new method should be contained within my ZClass1 instance? Second, why does manage_addProduct['...'] work? My product already existed and I'm not really adding a new product, so why do I need to call manage_addProduct? Thanks. James W. Howe mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103

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RE: [Zope] [Q] Design decisions: the use of ZCatalogs versus a ba ckend DB?
by Michel Pelletier 24 Jan '00

24 Jan '00

> -----Original Message----- > From: Darran Edmundson [mailto:Darran.Edmundson@anu.edu.au] > > Toying with ZCatalogs, I am starting to wonder if > many of the uses I envisioned are not better served > with a backend database. For example, for a publication > database where nearly all of the instance data needs to > be indexed (author, title, journal, year), this results > in near total duplication of the instance data within the > catalog. Yep, of course, if you use an rdbm, you have duplicate data between Zope and it. > It seems that ZCatalogs are meant to be used if (i) only > a fraction of the instance data needs to be indexed, or > (ii) the dataset is small enough that one can live with > the duplication. I'm not sure I understand, indexing requires duplicate data of some kind. And it's not one to one duplication, the catalog goes to great lengths to store that information efficiently. > As another example, consider a catalog of URLs (descriptor, > link, creation_date) gleaned from a URLClass ZClass. Here > we might have hundreds of URLClass instances peppered > throughout user folders and all of the data needs to be > indexed. Is the overhead of object creation and duplication > within the catalog better served with a simple backend > database? Actually, in this case there is no duplication. URL information is generated dynamicly from Zope, there is no universal URL to object mapping, the information is distributed and implicit within the structure of the object system and how you access it. But I see what you mean, the thing is, you can't have an index really without a corpus of information *to* index, so there is allways duplication of information, otherwise you would have to do real time 'grepping' through the objects. -Michel

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ZCatalog'ing nested ZClasses?
by Darran Edmundson 24 Jan '00

24 Jan '00

I have a nested ZClass (Foo2) in a folderish container class (Foo1), ie., Foo1Product Foo1Class Foo2Class My problem is that Foo2Class's meta-type does not appear in a ZCatalog instance's "Find items to ZCatalog" selection box. This is true even if the ZCatalog is created inside a Foo1Class instance. However, if I select "All types" in "Items to catalog", Foo2Class instances *are* found and catalogued. How can I get this nested ZClass to show up in the selection box? Cheers, Darran.

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Lock File? --Help please
by Schmidt, Jens-Uwe 24 Jan '00

24 Jan '00

Hello all, my Zope Process crashed and I'm not able to start it up again. This is the response: <html> <head> <title>exceptions.ImportError</title> </head> <body> Sorry, a SERIOUS APPLICATION ERROR occurred.<p>  </body> </html> --------------------- Is there any lock-file, can't find one....?! Any suggestions? Thanks a lot, JUS Jens-Uwe Schmidt * j.schmidt(a)first-fm.de Mail und Internet Administration TUI Infotec * Lister Straße 11 30163 Hannover * Tel 0511/9658-357 * Fax..-303 If the 8086 architects had designed a car, they would have produced one with legs, to be compatible with the horse.

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RE: [Zope] External methods on Zope.org
by Michel Pelletier 24 Jan '00

24 Jan '00

> -----Original Message----- > From: Ulf Engstrøm [mailto:b2blink@hotmail.com] > Sent: Monday, January 24, 2000 5:58 AM > To: zope(a)zope.org > Subject: [Zope] External methods on Zope.org > > > Hello...:) > I was just wondering if it's possible to use External methods > (Py of course) > on zope.org and in case of yes, how? > I know how to use external methods on my own distribution, but not on > Zope.org > Best regards > Ulf Sorry we don't allow access to raw python on the Zope site. -Michel

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RE: [Zope] ZCatalog: How to use a subattribute as index?
by Michel Pelletier 24 Jan '00

24 Jan '00

> -----Original Message----- > From: Hung Jung Lu [mailto:hungjunglu@hotmail.com] > Sent: Friday, January 21, 2000 7:53 PM > To: michel(a)digicool.com; zope(a)zope.org > Subject: RE: [Zope] ZCatalog: How to use a subattribute as index? > > > >From: Michel Pelletier <michel(a)digicool.com> > >Programatically. The 'Find' machinery will not find the > sub-sub-attr if > >the sub-attr is not traversable. > > > >Create an index called 'raw'. > > > ><dtml-with "mySQLMethod"> > > <dtml-call "Catalog.index_object(template, absolute_url())"> > ></dtml-with> > > > >or something like that... > > Where can I find out more about the index_object? In the ZCatalog documentation that I'm not done writing yet. > Is your "Catalog" a default attribute of all ZObjects, > or is your "Catalog" the instance of ZCatalog? An instance of a ZCatalog. -Michel

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ZPyGreSQLDA can't find _pg ; community-membership product?
by Ert Dredge 24 Jan '00

24 Jan '00

Hiya. Total newbie question here. First time using Zope or Python. I currently have a relatively standard community portal site written in perl with a PostgreSQL datastore that I'm toying with porting over to Zope. It's pretty much (1) users can register and (2) users can post profiles of themselves for others to see. Nothing too fancy, and I was hoping there would be a relatively canned out-of-the-box implementation of such a beast that I could poke at and see how it ticks. So the first thing I did was try to get the postgres DA product working since I knew I would have to use my data in my database, or at least suck it out once. But I'm running into trouble. When I go to the product list in the control panel, ZPyGreSQLDA is described as broken, with the complaint ZPyGreSQLDA Import Traceback File ".../Products/ZPyGreSQLDA/db.py", line 89, in ? import _pg, regex, sys, types ImportError: No module named _pg However, if I just start up the python interpreter and execute "import _pg" it returns without incident. I installed the pygresql RPM and can see _pg.so and pg.sy in the site-packages directory, and even symlinked them up a directory to see if that would help. Any thoughts? I figure I'm just missing something obvious. Second, does anyone have pointers about how to start diving into building a little community site? With an SQL DB in back? I've been going around the documentation for hours and haven't found anything conclusive, plus I'm still pretty hazy on the way it appears zope.org uses zope's built-in user management for membership registration... Thanks! - Ert

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Re: [Zope] DTML editing tips, for emacs or otherwise?
by J C Lawrence 24 Jan '00

24 Jan '00

On Mon, 24 Jan 2000 11:35:52 +0200 Erno Kuusela <erno(a)iki.fi> wrote: > also, if zope is running on another machine, ftp is insecure. is > there any way to prevent stuff from being transmitted in the > clear? While I haven't done it yet, I've been playing with the idea of using SSH port forwarding to crypt the connectivity to Zope, and then running everything thru the forwarded post on localhost. -- J C Lawrence Home: claw(a)kanga.nu ----------(*) Other: coder(a)kanga.nu --=| A man is as sane as he is dangerous to his environment |=--

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[Q] More baseclass, subclass, nested class confusion ...
by Darran Edmundson 24 Jan '00

24 Jan '00

I'm still struggling with through-the-web ZClass definitions. The test problem I am using as an example is the Actor-Participant object model proposed by Phillip Eby (thanks Phillip!). The people at my academic site each have a folderish PersonClass. Academics typically proceed through undergrad, graduate school, postdoc or alumni, etc. So, beneath the PersonClass I have created an ObjectManager-based PositionClass with properties StartDate and EndDate. I want to use this as a base class for further refinements: DegreeClass, PostDocClass, ProfessorClass, SabbaticalClass, ie., PersonProduct - PersonClass (ObjectManager) PersonClassProperties (FirstName, LastName, Email, URL) - PositionClass (ObjectManager) PositionProperties (StartDate, EndDate) - DegreeClass (PositionClass) DegreeProperties (School, Degree) - AlumniClass (PositionClass) AlumniProperties (CurrentEmployment) ... The idea is for individuals to build up a chronology of positions by adding instances of these PositionClass-derived ZClasses to their respective folders. Here PositionClass is meant to be an abstract class. The user should not be able to create an instance of this class but I cannot figure out how to prevent PositionClass from being an "available object" under PersonClass instances. Any help is much appreciated. Darran.

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