Good evening everybody!
I have some question regarding attribute and agent programming for ZPatterns.
I have some provider which is registered for the "handlers" and "attributes"
methods and some attributes.
My problem is when trying to create a new object and directly editing it, e.g.
obj=newItem()
obj.propertysheets.data.manage_changeProperties(foobar=13)
the propertysheet is defined and my provider is also registered for
handling the property "foobar". Unfortunately my SetAttributeFor() method
is never called.
Also defined in my provider are _objectAdded(), _objectAdding(), _objectChanged()
(but not _objectChanging()). Here's what they do:
_objectAdded() is storing the data collected via SetAttributeFor() into an sql database as new record
_objectAdding() is doing the same as the original method but also committing the transaction
as otherwise the new record will not be stored into the database (basically
it calls _objectAdded() via the transaction mechanism). I needed to do that
as otherwise a getattr on the primary key (==loadAttrib) failed as I try
to retrieve the record inside the _AttributeFor() method.
_objectChanged() doing the same as objectAdded() but updating the sql database.
So what's happening is that _objectAdding() and _objectAdded() get called from the newItem()
call but _SetAttributeFor() is not called. When doing the manage_changeProperties() inside
a new method which is called manually (and does a getItem()) everything is fine.
I've also tried to do
obj=newItem()
newid=obj.id
obj2=getItem(newid)
obj2.propertysheets.data.manage_changeProperties(foobar=13)
but this also did not call _SetAttributeFor().
So does any ZPatterns wizard has any idea on what I might do wrong?
(I can also send someone the source code if this message seems too confusing ;-)
regards,
Christian Scholz
PS: What I am trying to create is an sql attribute provider for ZPatterns which
is some replacement for manually creating the zsql method and SkinScript methods.
Unfortunately it seems more difficult than I thought at first ;-)
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