Ok,
I have managed to get rid of the problem, but I'm don't like what is
happening.
Solution: remove a secondary relation from the model:
model = relationship("Model", secondary='item_group', uselist=False)
After this, the following code does do a proper delete of the items:
for it in self.session.query(ItemMeta).filter_by(item_group=item_group).all():
if type(it) == ItemMeta:
item_group.items.remove(it)
self.session.delete(it)
self.session.commit()
However, things are still not ideal. The following should work but doesn't:
for item in item_group.items:
self.session.delete(item)
Then only half of the item get deleted, which is a bit weird.
Anybody any thoughts on this? Why does a secondary relation of this kind of
effect on a delete?
Kinde regards,
Nacho
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