Hi everybody! I am trying to write some attribute provider for storing data inside an SQL table as I am bored of typing parameter lists over and over again (e.g. in every ZSQL method, in every SkinScript method etc.) The problem now is that adding a new row to the table (and thus adding a new object to the rack) is working well but updating an object does not. Basically the main problem is that _objectChanged is not called in my provider. What I did is the following: - If an attribute of the propsheet is changed, _SetAttributeFor is called and stores it into the cache (as I don't want to update the database for every attribute change). - _objectChanged is then supposed to create an sql query and execute it. This - as said - is actually not happening, as the whole method is not called. - My namesForRegistration looks like this: def namesForRegistration(self,container): """ return names for registration """ return { 'provides':('handlers','attributes'), 'getattr': self._attribs.keys(), 'setattr': self._attribs.keys(), 'delattr': self._attribs.keys() } with self._attribs containing the attributes my provider is responsible for. So is there any reason why _objectChanged is not called? Actually I am a bit confused when reading the ZPatterns source which should call it.. ;-) So which are the conditions under which it's supposed to be called? (_objectAdded() as said before is called actually..) I hope someone can help me :) cheers, Christian -- COM.lounge http://comlounge.net/ communication & design info@comlounge.net