Hi Lorenzo,
The key reference adapter can only get a key reference **after** the
object is added to the database (because it uses _p_oid).
The problem could be fixed with a subscriber to IObjectAddedEvent::
def FilterableContainerInitializationHandler(object, event):
"""Initialize container after its ObjectAddedEvent."""
# I have checks here too (maybe unecessary)
if not IObjectAddedEvent.providedBy(event):
return
if not IFilterableContainer.providedBy(object):
return
# whatever needs to be done
# self._catalog ...
This handler is configured::
<!-- initialization handler -->
<subscriber
for=".IFilterableContainer
zope.app.container.interfaces.IObjectAddedEvent"
handler=".subscribers.FilterableContainerInitializationHandler"
/>
Hope that helps.
Best regards,
Darryl
On Tue, 2006-07-25 at 11:26 +0200, Lorenzo Gil Sanchez wrote:
> Hi,
>
> I have a special Folder content. When an instance of this class is
> created I want to create a catalog and an index in its __init__ method.
> Something like:
>
> class FilterableContainer(BTreeContainer):
>
> implements(IFilterableContainer)
>
> def __init__(self):
> super(FilterableContainer, self).__init__()
> self._catalog = LocalCatalog()
> self._catalog['attr1'] = FieldIndex(field_name='attr1')
>
> where LocalCatalog is a subclass of Catalog that only indexes objects
> that belong to its parent.
>
> The problem arises when I add my FieldIndex to my internal catalog. Some
> events are triggered and at the end I got this exception:
>
> File "/opt/Zope-3.2.1/lib/python/zope/app/keyreference/persistent.py",
> line 41, in __init__
> raise zope.app.keyreference.interfaces.NotYet(object)
> NotYet: <zope.app.catalog.field.FieldIndex object at 0x2aaab3609b90>
>
>
> It happens because the key reference adaptor to Persistent thinks my
> FieldIndex object is already stored in the database, which is not the
> case.
>
> Anybody knows how should I add an index to my catalog in the __init__
> method?
>
> Thanks in advance
>
> Lorenzo
>
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