--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/model_inheritance_regress/tests.py Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,388 @@
+"""
+Regression tests for Model inheritance behaviour.
+"""
+
+import datetime
+from operator import attrgetter
+
+from django.test import TestCase
+
+from models import (Place, Restaurant, ItalianRestaurant, ParkingLot,
+ ParkingLot2, ParkingLot3, Supplier, Wholesaler, Child, SelfRefParent,
+ SelfRefChild, ArticleWithAuthor, M2MChild, QualityControl, DerivedM,
+ Person, BirthdayParty, BachelorParty, MessyBachelorParty,
+ InternalCertificationAudit)
+
+
+class ModelInheritanceTest(TestCase):
+ def test_model_inheritance(self):
+ # Regression for #7350, #7202
+ # Check that when you create a Parent object with a specific reference
+ # to an existent child instance, saving the Parent doesn't duplicate
+ # the child. This behaviour is only activated during a raw save - it
+ # is mostly relevant to deserialization, but any sort of CORBA style
+ # 'narrow()' API would require a similar approach.
+
+ # Create a child-parent-grandparent chain
+ place1 = Place(
+ name="Guido's House of Pasta",
+ address='944 W. Fullerton')
+ place1.save_base(raw=True)
+ restaurant = Restaurant(
+ place_ptr=place1,
+ serves_hot_dogs=True,
+ serves_pizza=False)
+ restaurant.save_base(raw=True)
+ italian_restaurant = ItalianRestaurant(
+ restaurant_ptr=restaurant,
+ serves_gnocchi=True)
+ italian_restaurant.save_base(raw=True)
+
+ # Create a child-parent chain with an explicit parent link
+ place2 = Place(name='Main St', address='111 Main St')
+ place2.save_base(raw=True)
+ park = ParkingLot(parent=place2, capacity=100)
+ park.save_base(raw=True)
+
+ # Check that no extra parent objects have been created.
+ places = list(Place.objects.all())
+ self.assertEqual(places, [place1, place2])
+
+ dicts = list(Restaurant.objects.values('name','serves_hot_dogs'))
+ self.assertEqual(dicts, [{
+ 'name': u"Guido's House of Pasta",
+ 'serves_hot_dogs': True
+ }])
+
+ dicts = list(ItalianRestaurant.objects.values(
+ 'name','serves_hot_dogs','serves_gnocchi'))
+ self.assertEqual(dicts, [{
+ 'name': u"Guido's House of Pasta",
+ 'serves_gnocchi': True,
+ 'serves_hot_dogs': True,
+ }])
+
+ dicts = list(ParkingLot.objects.values('name','capacity'))
+ self.assertEqual(dicts, [{
+ 'capacity': 100,
+ 'name': u'Main St',
+ }])
+
+ # You can also update objects when using a raw save.
+ place1.name = "Guido's All New House of Pasta"
+ place1.save_base(raw=True)
+
+ restaurant.serves_hot_dogs = False
+ restaurant.save_base(raw=True)
+
+ italian_restaurant.serves_gnocchi = False
+ italian_restaurant.save_base(raw=True)
+
+ place2.name='Derelict lot'
+ place2.save_base(raw=True)
+
+ park.capacity = 50
+ park.save_base(raw=True)
+
+ # No extra parent objects after an update, either.
+ places = list(Place.objects.all())
+ self.assertEqual(places, [place2, place1])
+ self.assertEqual(places[0].name, 'Derelict lot')
+ self.assertEqual(places[1].name, "Guido's All New House of Pasta")
+
+ dicts = list(Restaurant.objects.values('name','serves_hot_dogs'))
+ self.assertEqual(dicts, [{
+ 'name': u"Guido's All New House of Pasta",
+ 'serves_hot_dogs': False,
+ }])
+
+ dicts = list(ItalianRestaurant.objects.values(
+ 'name', 'serves_hot_dogs', 'serves_gnocchi'))
+ self.assertEqual(dicts, [{
+ 'name': u"Guido's All New House of Pasta",
+ 'serves_gnocchi': False,
+ 'serves_hot_dogs': False,
+ }])
+
+ dicts = list(ParkingLot.objects.values('name','capacity'))
+ self.assertEqual(dicts, [{
+ 'capacity': 50,
+ 'name': u'Derelict lot',
+ }])
+
+ # If you try to raw_save a parent attribute onto a child object,
+ # the attribute will be ignored.
+
+ italian_restaurant.name = "Lorenzo's Pasta Hut"
+ italian_restaurant.save_base(raw=True)
+
+ # Note that the name has not changed
+ # - name is an attribute of Place, not ItalianRestaurant
+ dicts = list(ItalianRestaurant.objects.values(
+ 'name','serves_hot_dogs','serves_gnocchi'))
+ self.assertEqual(dicts, [{
+ 'name': u"Guido's All New House of Pasta",
+ 'serves_gnocchi': False,
+ 'serves_hot_dogs': False,
+ }])
+
+ def test_issue_7105(self):
+ # Regressions tests for #7105: dates() queries should be able to use
+ # fields from the parent model as easily as the child.
+ obj = Child.objects.create(
+ name='child',
+ created=datetime.datetime(2008, 6, 26, 17, 0, 0))
+ dates = list(Child.objects.dates('created', 'month'))
+ self.assertEqual(dates, [datetime.datetime(2008, 6, 1, 0, 0)])
+
+ def test_issue_7276(self):
+ # Regression test for #7276: calling delete() on a model with
+ # multi-table inheritance should delete the associated rows from any
+ # ancestor tables, as well as any descendent objects.
+ place1 = Place(
+ name="Guido's House of Pasta",
+ address='944 W. Fullerton')
+ place1.save_base(raw=True)
+ restaurant = Restaurant(
+ place_ptr=place1,
+ serves_hot_dogs=True,
+ serves_pizza=False)
+ restaurant.save_base(raw=True)
+ italian_restaurant = ItalianRestaurant(
+ restaurant_ptr=restaurant,
+ serves_gnocchi=True)
+ italian_restaurant.save_base(raw=True)
+
+ ident = ItalianRestaurant.objects.all()[0].id
+ self.assertEqual(Place.objects.get(pk=ident), place1)
+ xx = Restaurant.objects.create(
+ name='a',
+ address='xx',
+ serves_hot_dogs=True,
+ serves_pizza=False)
+
+ # This should delete both Restuarants, plus the related places, plus
+ # the ItalianRestaurant.
+ Restaurant.objects.all().delete()
+
+ self.assertRaises(
+ Place.DoesNotExist,
+ Place.objects.get,
+ pk=ident)
+ self.assertRaises(
+ ItalianRestaurant.DoesNotExist,
+ ItalianRestaurant.objects.get,
+ pk=ident)
+
+ def test_issue_6755(self):
+ """
+ Regression test for #6755
+ """
+ r = Restaurant(serves_pizza=False)
+ r.save()
+ self.assertEqual(r.id, r.place_ptr_id)
+ orig_id = r.id
+ r = Restaurant(place_ptr_id=orig_id, serves_pizza=True)
+ r.save()
+ self.assertEqual(r.id, orig_id)
+ self.assertEqual(r.id, r.place_ptr_id)
+
+ def test_issue_7488(self):
+ # Regression test for #7488. This looks a little crazy, but it's the
+ # equivalent of what the admin interface has to do for the edit-inline
+ # case.
+ suppliers = Supplier.objects.filter(
+ restaurant=Restaurant(name='xx', address='yy'))
+ suppliers = list(suppliers)
+ self.assertEqual(suppliers, [])
+
+ def test_issue_11764(self):
+ """
+ Regression test for #11764
+ """
+ wholesalers = list(Wholesaler.objects.all().select_related())
+ self.assertEqual(wholesalers, [])
+
+ def test_issue_7853(self):
+ """
+ Regression test for #7853
+ If the parent class has a self-referential link, make sure that any
+ updates to that link via the child update the right table.
+ """
+ obj = SelfRefChild.objects.create(child_data=37, parent_data=42)
+ obj.delete()
+
+ def test_get_next_previous_by_date(self):
+ """
+ Regression tests for #8076
+ get_(next/previous)_by_date should work
+ """
+ c1 = ArticleWithAuthor(
+ headline='ArticleWithAuthor 1',
+ author="Person 1",
+ pub_date=datetime.datetime(2005, 8, 1, 3, 0))
+ c1.save()
+ c2 = ArticleWithAuthor(
+ headline='ArticleWithAuthor 2',
+ author="Person 2",
+ pub_date=datetime.datetime(2005, 8, 1, 10, 0))
+ c2.save()
+ c3 = ArticleWithAuthor(
+ headline='ArticleWithAuthor 3',
+ author="Person 3",
+ pub_date=datetime.datetime(2005, 8, 2))
+ c3.save()
+
+ self.assertEqual(c1.get_next_by_pub_date(), c2)
+ self.assertEqual(c2.get_next_by_pub_date(), c3)
+ self.assertRaises(
+ ArticleWithAuthor.DoesNotExist,
+ c3.get_next_by_pub_date)
+ self.assertEqual(c3.get_previous_by_pub_date(), c2)
+ self.assertEqual(c2.get_previous_by_pub_date(), c1)
+ self.assertRaises(
+ ArticleWithAuthor.DoesNotExist,
+ c1.get_previous_by_pub_date)
+
+ def test_inherited_fields(self):
+ """
+ Regression test for #8825 and #9390
+ Make sure all inherited fields (esp. m2m fields, in this case) appear
+ on the child class.
+ """
+ m2mchildren = list(M2MChild.objects.filter(articles__isnull=False))
+ self.assertEqual(m2mchildren, [])
+
+ # Ordering should not include any database column more than once (this
+ # is most likely to ocurr naturally with model inheritance, so we
+ # check it here). Regression test for #9390. This necessarily pokes at
+ # the SQL string for the query, since the duplicate problems are only
+ # apparent at that late stage.
+ qs = ArticleWithAuthor.objects.order_by('pub_date', 'pk')
+ sql = qs.query.get_compiler(qs.db).as_sql()[0]
+ fragment = sql[sql.find('ORDER BY'):]
+ pos = fragment.find('pub_date')
+ self.assertEqual(fragment.find('pub_date', pos + 1), -1)
+
+ def test_queryset_update_on_parent_model(self):
+ """
+ Regression test for #10362
+ It is possible to call update() and only change a field in
+ an ancestor model.
+ """
+ article = ArticleWithAuthor.objects.create(
+ author="fred",
+ headline="Hey there!",
+ pub_date=datetime.datetime(2009, 3, 1, 8, 0, 0))
+ update = ArticleWithAuthor.objects.filter(
+ author="fred").update(headline="Oh, no!")
+ self.assertEqual(update, 1)
+ update = ArticleWithAuthor.objects.filter(
+ pk=article.pk).update(headline="Oh, no!")
+ self.assertEqual(update, 1)
+
+ derivedm1 = DerivedM.objects.create(
+ customPK=44,
+ base_name="b1",
+ derived_name="d1")
+ self.assertEqual(derivedm1.customPK, 44)
+ self.assertEqual(derivedm1.base_name, 'b1')
+ self.assertEqual(derivedm1.derived_name, 'd1')
+ derivedms = list(DerivedM.objects.all())
+ self.assertEqual(derivedms, [derivedm1])
+
+ def test_use_explicit_o2o_to_parent_as_pk(self):
+ """
+ Regression tests for #10406
+ If there's a one-to-one link between a child model and the parent and
+ no explicit pk declared, we can use the one-to-one link as the pk on
+ the child.
+ """
+ self.assertEqual(ParkingLot2._meta.pk.name, "parent")
+
+ # However, the connector from child to parent need not be the pk on
+ # the child at all.
+ self.assertEqual(ParkingLot3._meta.pk.name, "primary_key")
+ # the child->parent link
+ self.assertEqual(
+ ParkingLot3._meta.get_ancestor_link(Place).name,
+ "parent")
+
+ def test_all_fields_from_abstract_base_class(self):
+ """
+ Regression tests for #7588
+ """
+ # All fields from an ABC, including those inherited non-abstractly
+ # should be available on child classes (#7588). Creating this instance
+ # should work without error.
+ QualityControl.objects.create(
+ headline="Problems in Django",
+ pub_date=datetime.datetime.now(),
+ quality=10,
+ assignee="adrian")
+
+ def test_abstract_base_class_m2m_relation_inheritance(self):
+ # Check that many-to-many relations defined on an abstract base class
+ # are correctly inherited (and created) on the child class.
+ p1 = Person.objects.create(name='Alice')
+ p2 = Person.objects.create(name='Bob')
+ p3 = Person.objects.create(name='Carol')
+ p4 = Person.objects.create(name='Dave')
+
+ birthday = BirthdayParty.objects.create(
+ name='Birthday party for Alice')
+ birthday.attendees = [p1, p3]
+
+ bachelor = BachelorParty.objects.create(name='Bachelor party for Bob')
+ bachelor.attendees = [p2, p4]
+
+ parties = list(p1.birthdayparty_set.all())
+ self.assertEqual(parties, [birthday])
+
+ parties = list(p1.bachelorparty_set.all())
+ self.assertEqual(parties, [])
+
+ parties = list(p2.bachelorparty_set.all())
+ self.assertEqual(parties, [bachelor])
+
+ # Check that a subclass of a subclass of an abstract model doesn't get
+ # it's own accessor.
+ self.assertFalse(hasattr(p2, 'messybachelorparty_set'))
+
+ # ... but it does inherit the m2m from it's parent
+ messy = MessyBachelorParty.objects.create(
+ name='Bachelor party for Dave')
+ messy.attendees = [p4]
+ messy_parent = messy.bachelorparty_ptr
+
+ parties = list(p4.bachelorparty_set.all())
+ self.assertEqual(parties, [bachelor, messy_parent])
+
+ def test_11369(self):
+ """
+ verbose_name_plural correctly inherited from ABC if inheritance chain
+ includes an abstract model.
+ """
+ # Regression test for #11369: verbose_name_plural should be inherited
+ # from an ABC even when there are one or more intermediate
+ # abstract models in the inheritance chain, for consistency with
+ # verbose_name.
+ self.assertEquals(
+ InternalCertificationAudit._meta.verbose_name_plural,
+ u'Audits'
+ )
+
+ def test_inherited_nullable_exclude(self):
+ obj = SelfRefChild.objects.create(child_data=37, parent_data=42)
+ self.assertQuerysetEqual(
+ SelfRefParent.objects.exclude(self_data=72), [
+ obj.pk
+ ],
+ attrgetter("pk")
+ )
+ self.assertQuerysetEqual(
+ SelfRefChild.objects.exclude(self_data=72), [
+ obj.pk
+ ],
+ attrgetter("pk")
+ )