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Refs #18586 -- Split up model_inheritance.ModelInheritanceTest
This commit is contained in:
Alexander Shchapov
Tim Graham
parent
49d034fff2
commit
2cd19f3738
@ -49,9 +49,16 @@ class ModelInheritanceTests(TestCase):
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# doesn't exist as a model).
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self.assertRaises(AttributeError, lambda: CommonInfo.objects.all())
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def test_multiple_table(self):
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post = Post.objects.create(title="Lorem Ipsum")
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def test_reverse_relation_for_different_hierarchy_tree(self):
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# Even though p.supplier for a Place 'p' (a parent of a Supplier), a
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# Restaurant object cannot access that reverse relation, since it's not
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# part of the Place-Supplier Hierarchy.
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self.assertQuerysetEqual(Place.objects.filter(supplier__name="foo"), [])
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self.assertRaises(FieldError, Restaurant.objects.filter, supplier__name="foo")
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def test_model_with_distinct_accessors(self):
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# The Post model has distinct accessors for the Comment and Link models.
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post = Post.objects.create(title="Lorem Ipsum")
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post.attached_comment_set.create(content="Save $ on V1agr@", is_spam=True)
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post.attached_link_set.create(
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content="The Web framework for perfections with deadlines.",
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@ -64,47 +71,7 @@ class ModelInheritanceTests(TestCase):
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AttributeError, getattr, post, "attached_%(class)s_set"
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)
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# The Place/Restaurant/ItalianRestaurant models all exist as
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# independent models. However, the subclasses also have transparent
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# access to the fields of their ancestors.
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# Create a couple of Places.
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Place.objects.create(name="Master Shakes", address="666 W. Jersey")
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Place.objects.create(name="Ace Hardware", address="1013 N. Ashland")
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# Test constructor for Restaurant.
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r = Restaurant.objects.create(
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name="Demon Dogs",
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address="944 W. Fullerton",
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serves_hot_dogs=True,
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serves_pizza=False,
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rating=2
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)
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# Test the constructor for ItalianRestaurant.
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c = Chef.objects.create(name="Albert")
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ir = ItalianRestaurant.objects.create(
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name="Ristorante Miron",
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address="1234 W. Ash",
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serves_hot_dogs=False,
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serves_pizza=False,
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serves_gnocchi=True,
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rating=4,
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chef=c
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)
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self.assertQuerysetEqual(
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ItalianRestaurant.objects.filter(address="1234 W. Ash"), [
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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ir.address = "1234 W. Elm"
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ir.save()
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self.assertQuerysetEqual(
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ItalianRestaurant.objects.filter(address="1234 W. Elm"), [
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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def test_meta_fields_and_ordering(self):
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# Make sure Restaurant and ItalianRestaurant have the right fields in
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# the right order.
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self.assertEqual(
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@ -119,14 +86,91 @@ class ModelInheritanceTests(TestCase):
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)
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self.assertEqual(Restaurant._meta.ordering, ["-rating"])
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# Even though p.supplier for a Place 'p' (a parent of a Supplier), a
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# Restaurant object cannot access that reverse relation, since it's not
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# part of the Place-Supplier Hierarchy.
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self.assertQuerysetEqual(Place.objects.filter(supplier__name="foo"), [])
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self.assertRaises(
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FieldError, Restaurant.objects.filter, supplier__name="foo"
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def test_custompk_m2m(self):
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b = Base.objects.create()
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b.titles.add(Title.objects.create(title="foof"))
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s = SubBase.objects.create(sub_id=b.id)
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b = Base.objects.get(pk=s.id)
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self.assertNotEqual(b.pk, s.pk)
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# Low-level test for related_val
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self.assertEqual(s.titles.related_val, (s.id,))
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# Higher level test for correct query values (title foof not
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# accidentally found).
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self.assertQuerysetEqual(s.titles.all(), [])
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def test_update_parent_filtering(self):
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"""
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Test that updating a field of a model subclass doesn't issue an UPDATE
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query constrained by an inner query.
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Refs #10399
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"""
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supplier = Supplier.objects.create(
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name='Central market',
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address='610 some street',
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)
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# Capture the expected query in a database agnostic way
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with CaptureQueriesContext(connection) as captured_queries:
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Place.objects.filter(pk=supplier.pk).update(name=supplier.name)
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expected_sql = captured_queries[0]['sql']
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# Capture the queries executed when a subclassed model instance is saved.
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with CaptureQueriesContext(connection) as captured_queries:
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supplier.save(update_fields=('name',))
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for query in captured_queries:
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sql = query['sql']
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if 'UPDATE' in sql:
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self.assertEqual(expected_sql, sql)
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def test_eq(self):
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# Equality doesn't transfer in multitable inheritance.
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self.assertNotEqual(Place(id=1), Restaurant(id=1))
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self.assertNotEqual(Restaurant(id=1), Place(id=1))
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def test_mixin_init(self):
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m = MixinModel()
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self.assertEqual(m.other_attr, 1)
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class ModelInheritanceDataTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.restaurant = Restaurant.objects.create(
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name="Demon Dogs",
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address="944 W. Fullerton",
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serves_hot_dogs=True,
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serves_pizza=False,
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rating=2,
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)
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chef = Chef.objects.create(name="Albert")
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cls.italian_restaurant = ItalianRestaurant.objects.create(
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name="Ristorante Miron",
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address="1234 W. Ash",
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serves_hot_dogs=False,
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serves_pizza=False,
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serves_gnocchi=True,
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rating=4,
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chef=chef,
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)
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def test_filter_inherited_model(self):
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self.assertQuerysetEqual(
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ItalianRestaurant.objects.filter(address="1234 W. Ash"), [
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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def test_update_inherited_model(self):
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self.italian_restaurant.address = "1234 W. Elm"
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self.italian_restaurant.save()
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self.assertQuerysetEqual(
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ItalianRestaurant.objects.filter(address="1234 W. Elm"), [
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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def test_parent_fields_available_for_filtering_in_child_model(self):
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# Parent fields can be used directly in filters on the child model.
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self.assertQuerysetEqual(
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Restaurant.objects.filter(name="Demon Dogs"), [
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@ -135,21 +179,24 @@ class ModelInheritanceTests(TestCase):
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attrgetter("name")
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)
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self.assertQuerysetEqual(
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ItalianRestaurant.objects.filter(address="1234 W. Elm"), [
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ItalianRestaurant.objects.filter(address="1234 W. Ash"), [
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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def test_filter_on_parent_returns_object_of_parent_type(self):
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# Filters against the parent model return objects of the parent's type.
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p = Place.objects.get(name="Demon Dogs")
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self.assertIs(type(p), Place)
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def test_parent_child_one_to_one_link(self):
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# Since the parent and child are linked by an automatically created
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# OneToOneField, you can get from the parent to the child by using the
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# child's name.
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self.assertEqual(
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p.restaurant, Restaurant.objects.get(name="Demon Dogs")
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Place.objects.get(name="Demon Dogs").restaurant,
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Restaurant.objects.get(name="Demon Dogs")
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)
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self.assertEqual(
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Place.objects.get(name="Ristorante Miron").restaurant.italianrestaurant,
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@ -160,29 +207,35 @@ class ModelInheritanceTests(TestCase):
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ItalianRestaurant.objects.get(name="Ristorante Miron")
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)
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def test_parent_child_one_to_one_link_on_nonrelated_objects(self):
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# This won't work because the Demon Dogs restaurant is not an Italian
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# restaurant.
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self.assertRaises(
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ItalianRestaurant.DoesNotExist,
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lambda: p.restaurant.italianrestaurant
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lambda: Place.objects.get(name="Demon Dogs").restaurant.italianrestaurant
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)
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def test_inherited_does_not_exist_exception(self):
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# An ItalianRestaurant which does not exist is also a Place which does
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# not exist.
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self.assertRaises(
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Place.DoesNotExist,
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ItalianRestaurant.objects.get, name="The Noodle Void"
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)
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def test_inherited_multiple_objects_returned_exception(self):
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# MultipleObjectsReturned is also inherited.
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self.assertRaises(
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Place.MultipleObjectsReturned,
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Restaurant.objects.get, id__lt=12321
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)
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def test_related_objects_for_inherited_models(self):
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# Related objects work just as they normally do.
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s1 = Supplier.objects.create(name="Joe's Chickens", address="123 Sesame St")
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s1.customers = [r, ir]
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s1.customers = [self.restaurant, self.italian_restaurant]
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s2 = Supplier.objects.create(name="Luigi's Pasta", address="456 Sesame St")
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s2.customers = [ir]
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s2.customers = [self.italian_restaurant]
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# This won't work because the Place we select is not a Restaurant (it's
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# a Supplier).
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@ -193,7 +246,7 @@ class ModelInheritanceTests(TestCase):
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self.assertEqual(p.supplier, s1)
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self.assertQuerysetEqual(
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ir.provider.order_by("-name"), [
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self.italian_restaurant.provider.order_by("-name"), [
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"Luigi's Pasta",
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"Joe's Chickens"
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],
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@ -217,7 +270,7 @@ class ModelInheritanceTests(TestCase):
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name="Main St", address="111 Main St", main_site=s1
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)
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ParkingLot.objects.create(
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name="Well Lit", address="124 Sesame St", main_site=ir
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name="Well Lit", address="124 Sesame St", main_site=self.italian_restaurant
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)
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self.assertEqual(
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@ -225,6 +278,7 @@ class ModelInheritanceTests(TestCase):
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"Ristorante Miron"
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)
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def test_update_works_on_parent_and_child_models_at_once(self):
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# The update() command can update fields in parent and child classes at
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# once (although it executed multiple SQL queries to do so).
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rows = Restaurant.objects.filter(
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@ -234,18 +288,20 @@ class ModelInheritanceTests(TestCase):
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)
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self.assertEqual(rows, 1)
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r1 = Restaurant.objects.get(pk=r.pk)
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r1 = Restaurant.objects.get(pk=self.restaurant.pk)
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self.assertFalse(r1.serves_hot_dogs)
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self.assertEqual(r1.name, "Demon Puppies")
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def test_values_works_on_parent_model_fields(self):
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# The values() command also works on fields from parent models.
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self.assertQuerysetEqual(
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ItalianRestaurant.objects.values("name", "rating"), [
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{"rating": 4, "name": "Ristorante Miron"}
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{"rating": 4, "name": "Ristorante Miron"},
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],
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lambda o: o
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)
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def test_select_related_works_on_parent_model_fields(self):
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# select_related works with fields from the parent object as if they
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# were a normal part of the model.
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self.assertNumQueries(
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@ -260,22 +316,6 @@ class ModelInheritanceTests(TestCase):
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#23370 - Should be able to defer child fields when using
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select_related() from parent to child.
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"""
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Restaurant.objects.create(
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name="Demon Dogs",
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address="944 W. Fullerton",
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serves_hot_dogs=True,
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serves_pizza=False,
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rating=2,
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)
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ItalianRestaurant.objects.create(
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name="Ristorante Miron",
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address="1234 W. Ash",
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serves_hot_dogs=False,
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serves_pizza=False,
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serves_gnocchi=True,
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rating=4,
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)
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qs = (Restaurant.objects
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.select_related("italianrestaurant")
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.defer("italianrestaurant__serves_gnocchi")
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@ -292,91 +332,53 @@ class ModelInheritanceTests(TestCase):
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self.assertEqual(qs[1].italianrestaurant.name, 'Ristorante Miron')
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self.assertEqual(qs[1].italianrestaurant.rating, 4)
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def test_mixin_init(self):
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m = MixinModel()
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self.assertEqual(m.other_attr, 1)
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def test_update_query_counts(self):
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"""
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Test that update queries do not generate non-necessary queries.
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Refs #18304.
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"""
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c = Chef.objects.create(name="Albert")
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ir = ItalianRestaurant.objects.create(
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name="Ristorante Miron",
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address="1234 W. Ash",
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serves_hot_dogs=False,
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serves_pizza=False,
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serves_gnocchi=True,
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rating=4,
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chef=c
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)
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with self.assertNumQueries(3):
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ir.save()
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self.italian_restaurant.save()
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def test_update_parent_filtering(self):
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"""
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Test that updating a field of a model subclass doesn't issue an UPDATE
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query constrained by an inner query.
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Refs #10399
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"""
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supplier = Supplier.objects.create(
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name='Central market',
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address='610 some street'
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)
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# Capture the expected query in a database agnostic way
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with CaptureQueriesContext(connection) as captured_queries:
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Place.objects.filter(pk=supplier.pk).update(name=supplier.name)
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expected_sql = captured_queries[0]['sql']
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# Capture the queries executed when a subclassed model instance is saved.
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with CaptureQueriesContext(connection) as captured_queries:
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supplier.save(update_fields=('name',))
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for query in captured_queries:
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sql = query['sql']
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if 'UPDATE' in sql:
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self.assertEqual(expected_sql, sql)
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def test_eq(self):
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# Equality doesn't transfer in multitable inheritance.
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self.assertNotEqual(Place(id=1), Restaurant(id=1))
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self.assertNotEqual(Restaurant(id=1), Place(id=1))
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def test_ticket_12567(self):
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r = Restaurant.objects.create(name='n1', address='a1')
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s = Supplier.objects.create(name='s1', address='a2')
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self.assertQuerysetEqual(
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Place.objects.filter(supplier__isnull=False),
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[Place.objects.get(pk=s.pk)],
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lambda x: x
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def test_filter_inherited_on_null(self):
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# Refs #12567
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Supplier.objects.create(
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name="Central market",
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address="610 some street",
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)
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self.assertQuerysetEqual(
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Place.objects.filter(supplier__isnull=True),
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[Place.objects.get(pk=r.pk)],
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lambda x: x
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Place.objects.filter(supplier__isnull=False), [
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"Central market",
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],
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attrgetter("name")
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)
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self.assertQuerysetEqual(
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Place.objects.exclude(supplier__isnull=False),
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[Place.objects.get(pk=r.pk)],
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lambda x: x
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)
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self.assertQuerysetEqual(
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Place.objects.exclude(supplier__isnull=True),
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[Place.objects.get(pk=s.pk)],
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lambda x: x
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Place.objects.filter(supplier__isnull=True).order_by("name"), [
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"Demon Dogs",
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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def test_custompk_m2m(self):
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b = Base.objects.create()
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b.titles.add(Title.objects.create(title="foof"))
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s = SubBase.objects.create(sub_id=b.id)
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b = Base.objects.get(pk=s.id)
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self.assertNotEqual(b.pk, s.pk)
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# Low-level test for related_val
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self.assertEqual(s.titles.related_val, (s.id,))
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# Higher level test for correct query values (title foof not
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# accidentally found).
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def test_exclude_inherited_on_null(self):
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# Refs #12567
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Supplier.objects.create(
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name="Central market",
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address="610 some street",
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)
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self.assertQuerysetEqual(
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s.titles.all(), [])
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Place.objects.exclude(supplier__isnull=False).order_by("name"), [
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"Demon Dogs",
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"Ristorante Miron",
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],
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attrgetter("name")
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)
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self.assertQuerysetEqual(
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Place.objects.exclude(supplier__isnull=True), [
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"Central market",
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],
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attrgetter("name")
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)
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class InheritanceSameModelNameTests(TransactionTestCase):
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