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Fixed #28166 -- Fixed Model._state.db on MTI parent model after saving child model.
Regression in 38575b007a
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@ -271,7 +271,9 @@ class ForwardOneToOneDescriptor(ForwardManyToOneDescriptor):
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# on the related model for every deferred field.
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if not any(field in fields for field in deferred):
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kwargs = {field: getattr(instance, field) for field in fields}
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return rel_model(**kwargs)
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obj = rel_model(**kwargs)
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obj._state.db = instance._state.db
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return obj
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return super().get_object(instance)
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@ -84,3 +84,7 @@ Bugfixes
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* Fixed crash in ``BaseInlineFormSet._construct_form()`` when using
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``save_as_new`` (:ticket:`28159`).
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* Fixed a regression where ``Model._state.db`` wasn't set correctly on
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multi-table inheritance parent models after saving a child model
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(:ticket:`28166`).
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@ -472,6 +472,10 @@ class ModelInheritanceTest(TestCase):
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jane = Supplier.objects.order_by("name").select_related("restaurant")[0]
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self.assertEqual(jane.restaurant.name, "Craft")
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def test_ptr_accessor_assigns_db(self):
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r = Restaurant.objects.create()
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self.assertEqual(r.place_ptr._state.db, 'default')
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def test_related_filtering_query_efficiency_ticket_15844(self):
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r = Restaurant.objects.create(
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name="Guido's House of Pasta",
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