This abstract base class likely is a bit less performant than having
in-db support for cascades in pgsql... though it should give you the
behavior you are seeking.
It should set to default, or null if allowed.
Enjoy.
-k
class ClearOnDelete(models.Model):
def delete(self):
related_objects = self._meta.get_all_related_objects()
for object in related_objects:
accessor_name = object.get_accessor_name()
related_accessor = getattr(self.__class__, accessor_name)
related_accessor_instance = getattr(self, accessor_name)
if related_accessor.related.field.default is not NOT_PROVIDED:
for relation in related_accessor_instance.all():
setattr(relation,
related_accessor.related.field.name,
related_accessor.related.field.default)
relation.save()
elif related_accessor.related.field.null:
for relation in related_accessor_instance.all():
setattr(relation, related_accessor.related.field.name, None)
relation.save()
super(ClearOnDelete, self).delete()
class Meta:
abstract = True
--
You received this message because you are subscribed to the Google Groups
"Django developers" group.
To post to this group, send email to django-develop...@googlegroups.com.
To unsubscribe from this group, send email to
django-developers+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/django-developers?hl=en.
