Hi all!

I have been having some problems with ZClasses and the Catalog.
I made a new Catalogaware External Product, based mostly on the Boring and 
Photo products. When I add an instance to a folder the Catalog is updated, 
but doesn't point to the right object.

The product inherits from Catalogaware and Objectmanager (and some others).

In the folder "test" I add an XML Folder (the product) with name: "fold" and 
title: "no1".
The Catalog shows a new object with name "test" and title: "no1".
If I then add an XML Folder to test with name "fold2" and title "no2" the 
Catalog still only contains one object: test/no2.

If I want to delete the objects I get some weird behavior. The first one 
goes without a problem, it removes the entry from the Catalog. The second 
gives an error message:
"Error Type: ValueError
Error Value: Uncatalog of absent id 'Test' " This can probably be explained 
by the fact that there was only one entry pointing to the Test Folder.

Below I'll paste a bit of the XMLFolder.py file:

from Products.ZCatalog import ZCatalog
from Products.ZCatalog.CatalogAwareness import CatalogAware

import OFS.ObjectManager
import Acquisition
import AccessControl.Role

from Globals import HTMLFile      # fakes a method from a DTML file
from Globals import MessageDialog # provid
from Globals import Persistent    # makes an object stick in the ZODB

manage_addXMLFolderForm = HTMLFile('XMLFolderAdd', globals())

def manage_addXMLFolder(self, id, title='', REQUEST=None):
    """Add an XMLFolder to a folder."""
    self._setObject(id, XMLFolder(id, title))
    if REQUEST is not None:
        return self.manage_main(self, REQUEST)

class XMLFolder(
         CatalogAware, # Self indexing.
         OFS.ObjectManager.ObjectManager,   # A Folderish object.
    Persistent,            # Make us persistent. Yaah!
    Acquisition.Implicit,  # Uh, whatever.
    AccessControl.Role.RoleManager # Security manager.
    """XMLFolder object.

    meta_type = 'XML Folder' # what do people think they're adding?

    manage_options = ( # what management options are there?
        {'label': 'Contents',   'action': 'manage_main'},
        {'label': 'View',       'action': ''}, # defaults to index_html
        {'label': 'Security',   'action': 'manage_access'},

    __ac_permissions__=( # what permissions make sense for us?
        ('View management screens', ('manage_tabs','manage_main')),
        ('Change permissions',      ('manage_access',)           ),
        ('Change XML Folders'     , ('manage_edit',)             ),
        ('View XML Folders',        ('',)                        ),

    def __init__(self, id, title=''):
        """initialise a new instance of XMLFolder"""
        self.id = id
        self.title = title

Does anyone know what the problem might be, how I can get the Catalog point 
to the right object? I'm using Zope 2.1.4 on Windows NT.

Thanks in advance,
Bart Holthuijsen.
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