530 lines
20 KiB
Python
530 lines
20 KiB
Python
"""
|
|
Regression tests for Model inheritance behavior.
|
|
"""
|
|
import datetime
|
|
from operator import attrgetter
|
|
from unittest import expectedFailure
|
|
|
|
from django import forms
|
|
from django.test import TestCase
|
|
|
|
from .models import (
|
|
ArticleWithAuthor, BachelorParty, BirthdayParty, BusStation, Child,
|
|
DerivedM, InternalCertificationAudit, ItalianRestaurant, M2MChild,
|
|
MessyBachelorParty, ParkingLot, ParkingLot3, ParkingLot4A, ParkingLot4B,
|
|
Person, Place, Profile, QualityControl, Restaurant, SelfRefChild,
|
|
SelfRefParent, Senator, Supplier, TrainStation, User, Wholesaler,
|
|
)
|
|
|
|
|
|
class ModelInheritanceTest(TestCase):
|
|
def test_model_inheritance(self):
|
|
# Regression for #7350, #7202
|
|
# When you create a Parent object with a specific reference to an
|
|
# existent child instance, saving the Parent doesn't duplicate the
|
|
# child. This behavior 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)
|
|
|
|
# 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': "Guido's House of Pasta",
|
|
'serves_hot_dogs': True
|
|
}])
|
|
|
|
dicts = list(ItalianRestaurant.objects.values(
|
|
'name', 'serves_hot_dogs', 'serves_gnocchi'))
|
|
self.assertEqual(dicts, [{
|
|
'name': "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': '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': "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': "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': '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': "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.
|
|
Child.objects.create(
|
|
name='child',
|
|
created=datetime.datetime(2008, 6, 26, 17, 0, 0))
|
|
datetimes = list(Child.objects.datetimes('created', 'month'))
|
|
self.assertEqual(datetimes, [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)
|
|
Restaurant.objects.create(
|
|
name='a',
|
|
address='xx',
|
|
serves_hot_dogs=True,
|
|
serves_pizza=False)
|
|
|
|
# This should delete both Restaurants, plus the related places, plus
|
|
# the ItalianRestaurant.
|
|
Restaurant.objects.all().delete()
|
|
|
|
with self.assertRaises(Place.DoesNotExist):
|
|
Place.objects.get(pk=ident)
|
|
with self.assertRaises(ItalianRestaurant.DoesNotExist):
|
|
ItalianRestaurant.objects.get(pk=ident)
|
|
|
|
def test_issue_6755(self):
|
|
"""
|
|
Regression test for #6755
|
|
"""
|
|
r = Restaurant(serves_pizza=False, serves_hot_dogs=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, serves_hot_dogs=False)
|
|
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)
|
|
with 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)
|
|
with 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 occur 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):
|
|
"""
|
|
The connector from child to parent need not be the pk on the child.
|
|
"""
|
|
self.assertEqual(ParkingLot3._meta.pk.name, "primary_key")
|
|
# the child->parent link
|
|
self.assertEqual(ParkingLot3._meta.get_ancestor_link(Place).name, "parent")
|
|
|
|
def test_use_explicit_o2o_to_parent_from_abstract_model(self):
|
|
self.assertEqual(ParkingLot4A._meta.pk.name, "parent")
|
|
ParkingLot4A.objects.create(
|
|
name="Parking4A",
|
|
address='21 Jump Street',
|
|
)
|
|
|
|
self.assertEqual(ParkingLot4B._meta.pk.name, "parent")
|
|
ParkingLot4A.objects.create(
|
|
name="Parking4B",
|
|
address='21 Jump Street',
|
|
)
|
|
|
|
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):
|
|
# 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.set([p1, p3])
|
|
|
|
bachelor = BachelorParty.objects.create(name='Bachelor party for Bob')
|
|
bachelor.attendees.set([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])
|
|
|
|
# A subclass of a subclass of an abstract model doesn't get its own
|
|
# accessor.
|
|
self.assertFalse(hasattr(p2, 'messybachelorparty_set'))
|
|
|
|
# ... but it does inherit the m2m from its parent
|
|
messy = MessyBachelorParty.objects.create(
|
|
name='Bachelor party for Dave')
|
|
messy.attendees.set([p4])
|
|
messy_parent = messy.bachelorparty_ptr
|
|
|
|
parties = list(p4.bachelorparty_set.all())
|
|
self.assertEqual(parties, [bachelor, messy_parent])
|
|
|
|
def test_abstract_verbose_name_plural_inheritance(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.assertEqual(
|
|
InternalCertificationAudit._meta.verbose_name_plural,
|
|
'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")
|
|
)
|
|
|
|
def test_concrete_abstract_concrete_pk(self):
|
|
"""
|
|
Primary key set correctly with concrete->abstract->concrete inheritance.
|
|
"""
|
|
# Regression test for #13987: Primary key is incorrectly determined
|
|
# when more than one model has a concrete->abstract->concrete
|
|
# inheritance hierarchy.
|
|
self.assertEqual(
|
|
len([field for field in BusStation._meta.local_fields if field.primary_key]),
|
|
1
|
|
)
|
|
self.assertEqual(
|
|
len([field for field in TrainStation._meta.local_fields if field.primary_key]),
|
|
1
|
|
)
|
|
self.assertIs(BusStation._meta.pk.model, BusStation)
|
|
self.assertIs(TrainStation._meta.pk.model, TrainStation)
|
|
|
|
def test_inherited_unique_field_with_form(self):
|
|
"""
|
|
A model which has different primary key for the parent model passes
|
|
unique field checking correctly (#17615).
|
|
"""
|
|
class ProfileForm(forms.ModelForm):
|
|
class Meta:
|
|
model = Profile
|
|
fields = '__all__'
|
|
|
|
User.objects.create(username="user_only")
|
|
p = Profile.objects.create(username="user_with_profile")
|
|
form = ProfileForm({'username': "user_with_profile", 'extra': "hello"}, instance=p)
|
|
self.assertTrue(form.is_valid())
|
|
|
|
def test_inheritance_joins(self):
|
|
# Test for #17502 - check that filtering through two levels of
|
|
# inheritance chain doesn't generate extra joins.
|
|
qs = ItalianRestaurant.objects.all()
|
|
self.assertEqual(str(qs.query).count('JOIN'), 2)
|
|
qs = ItalianRestaurant.objects.filter(name='foo')
|
|
self.assertEqual(str(qs.query).count('JOIN'), 2)
|
|
|
|
@expectedFailure
|
|
def test_inheritance_values_joins(self):
|
|
# It would be nice (but not too important) to skip the middle join in
|
|
# this case. Skipping is possible as nothing from the middle model is
|
|
# used in the qs and top contains direct pointer to the bottom model.
|
|
qs = ItalianRestaurant.objects.values_list('serves_gnocchi').filter(name='foo')
|
|
self.assertEqual(str(qs.query).count('JOIN'), 1)
|
|
|
|
def test_issue_21554(self):
|
|
senator = Senator.objects.create(name='John Doe', title='X', state='Y')
|
|
senator = Senator.objects.get(pk=senator.pk)
|
|
self.assertEqual(senator.name, 'John Doe')
|
|
self.assertEqual(senator.title, 'X')
|
|
self.assertEqual(senator.state, 'Y')
|
|
|
|
def test_inheritance_resolve_columns(self):
|
|
Restaurant.objects.create(name='Bobs Cafe', address="Somewhere",
|
|
serves_pizza=True, serves_hot_dogs=True)
|
|
p = Place.objects.all().select_related('restaurant')[0]
|
|
self.assertIsInstance(p.restaurant.serves_pizza, bool)
|
|
|
|
def test_inheritance_select_related(self):
|
|
# Regression test for #7246
|
|
r1 = Restaurant.objects.create(
|
|
name="Nobu", serves_hot_dogs=True, serves_pizza=False
|
|
)
|
|
r2 = Restaurant.objects.create(
|
|
name="Craft", serves_hot_dogs=False, serves_pizza=True
|
|
)
|
|
Supplier.objects.create(name="John", restaurant=r1)
|
|
Supplier.objects.create(name="Jane", restaurant=r2)
|
|
|
|
self.assertQuerysetEqual(
|
|
Supplier.objects.order_by("name").select_related(), [
|
|
"Jane",
|
|
"John",
|
|
],
|
|
attrgetter("name")
|
|
)
|
|
|
|
jane = Supplier.objects.order_by("name").select_related("restaurant")[0]
|
|
self.assertEqual(jane.restaurant.name, "Craft")
|
|
|
|
def test_filter_with_parent_fk(self):
|
|
r = Restaurant.objects.create()
|
|
s = Supplier.objects.create(restaurant=r)
|
|
# The mismatch between Restaurant and Place is intentional (#28175).
|
|
self.assertSequenceEqual(Supplier.objects.filter(restaurant__in=Place.objects.all()), [s])
|
|
|
|
def test_ptr_accessor_assigns_state(self):
|
|
r = Restaurant.objects.create()
|
|
self.assertIs(r.place_ptr._state.adding, False)
|
|
self.assertEqual(r.place_ptr._state.db, 'default')
|
|
|
|
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.assertSequenceEqual(Supplier.objects.filter(restaurant=r), [s])
|
|
with self.assertNumQueries(1):
|
|
self.assertSequenceEqual(r.supplier_set.all(), [s])
|
|
|
|
def test_queries_on_parent_access(self):
|
|
italian_restaurant = ItalianRestaurant.objects.create(
|
|
name="Guido's House of Pasta",
|
|
address='944 W. Fullerton',
|
|
serves_hot_dogs=True,
|
|
serves_pizza=False,
|
|
serves_gnocchi=True,
|
|
)
|
|
|
|
# No queries are made when accessing the parent objects.
|
|
italian_restaurant = ItalianRestaurant.objects.get(pk=italian_restaurant.pk)
|
|
with self.assertNumQueries(0):
|
|
restaurant = italian_restaurant.restaurant_ptr
|
|
self.assertEqual(restaurant.place_ptr.restaurant, restaurant)
|
|
self.assertEqual(restaurant.italianrestaurant, italian_restaurant)
|
|
|
|
# One query is made when accessing the parent objects when the instance
|
|
# is deferred.
|
|
italian_restaurant = ItalianRestaurant.objects.only('serves_gnocchi').get(pk=italian_restaurant.pk)
|
|
with self.assertNumQueries(1):
|
|
restaurant = italian_restaurant.restaurant_ptr
|
|
self.assertEqual(restaurant.place_ptr.restaurant, restaurant)
|
|
self.assertEqual(restaurant.italianrestaurant, italian_restaurant)
|
|
|
|
# No queries are made when accessing the parent objects when the
|
|
# instance has deferred a field not present in the parent table.
|
|
italian_restaurant = ItalianRestaurant.objects.defer('serves_gnocchi').get(pk=italian_restaurant.pk)
|
|
with self.assertNumQueries(0):
|
|
restaurant = italian_restaurant.restaurant_ptr
|
|
self.assertEqual(restaurant.place_ptr.restaurant, restaurant)
|
|
self.assertEqual(restaurant.italianrestaurant, italian_restaurant)
|