Hello all!
I'm currently developing a Archetypes based product for Plone 3.1.7 (Zope
2.10.6-final, python 2.4.4, linux2).
What is the best and safest way to abort object deletion and display an
informative message? I want to abort deletion of objects of a custom content
type iff it has references to other objects. The user should be redirected to
the base view of the object, if he tries to delete (actions menu or otherwise
ttw) a object with references still in place. The references are implemented
using the ReferenceField from Archetypes.
Currently I am trying to get things working by implementing an adapter for the
IObjectWillBeRemovedEvent event:
@adapter(IEntry, IObjectWillBeRemovedEvent)
def verifyOnDeletion(obj, event):
"""
"""
[...]
raise zExceptions.Redirect(obj.asolute_url())
[...]
The function never gets called... Yes I registered the adapter with
<subscriber handler=".vocabulary.verifyOnDeletion" />. Other adapters defined
that way get called...
Am I on the right path? Input really appreciated!
Thanks,
Johannes
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