Ticket : https://code.djangoproject.com/ticket/34634
PR : https://github.com/django/django/pull/16952
*Possible reason behind the bug:*
- The local OneToOneField of place_ptr inside
ItalianRestaurantManyParents is being inherited from the place_ptr field
of Restaurant. Which is one of the ancestor of the current model.
- That successfully inserts the model Place while calling _save_parents()
for Restaurant inside the recursion tree.
- So the local field of place_ptr does not have an attribute with name
attname.
*Possible fix :*
- When fetching the immediate parents inside the _save_parents() method,
eliminate the ones which have a subclass inside that list. As they willbe
called again when we insert their subclass.
*Problem with the fix:*
Not being able to reproduce the behavior of the failed test in Local with
postgresql and sqlite3 database. All the assertions are passing there.
Traceback (most recent call last): File
"/home/jenkins/workspace/pull-requests-focal/database/mysql/label/focal-pr/python/python3.11/tests/model_inheritance/tests.py",
line 169, in test_create_diamond_mti_common_parents
self.assertEqual(itrmp.name, "Ristorante Miron") AssertionError: '' !=
'Ristorante Miron' + Ristorante Miron
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