Commit fa2e1e63 authored by Tim Graham's avatar Tim Graham
Browse files

Refs #15844 -- Added tests for multi-table inheritance related object filtering efficiency. 

Fixed in 97774429.
parent 41ed6338

tests/model_inheritance_regress/tests.py

+19 −0
Original line number Diff line number Diff line
@@ -493,3 +493,22 @@ class ModelInheritanceTest(TestCase): 


        jane = Supplier.objects.order_by("name").select_related("restaurant")[0]

        self.assertEqual(jane.restaurant.name, "Craft")



    def test_related_filtering_query_efficiency_ticket_15844(self):

        r = Restaurant.objects.create(

            name="Guido's House of Pasta",

            address='944 W. Fullerton',

            serves_hot_dogs=True,

            serves_pizza=False,

        )

        s = Supplier.objects.create(restaurant=r)

        with self.assertNumQueries(1):

            self.assertQuerysetEqual(

                Supplier.objects.filter(restaurant=r),

                [s], lambda x: x,

            )

        with self.assertNumQueries(1):

            self.assertQuerysetEqual(

                r.supplier_set.all(),

                [s], lambda x: x,

            )