mirror of
https://github.com/django/django.git
synced 2024-12-27 19:46:22 +00:00
b77f26313c
GenericRelation now supports an optional related_query_name argument. Setting related_query_name adds a relation from the related object back to the content type for filtering, ordering and other query operations. Thanks to Loic Bistuer for spotting a couple of important issues in his review.
250 lines
9.8 KiB
Python
250 lines
9.8 KiB
Python
from django.db.models import Q, Sum
|
|
from django.db.utils import IntegrityError
|
|
from django.test import TestCase, skipIfDBFeature
|
|
from django.forms.models import modelform_factory
|
|
|
|
from .models import (
|
|
Address, Place, Restaurant, Link, CharLink, TextLink,
|
|
Person, Contact, Note, Organization, OddRelation1, OddRelation2, Company,
|
|
Developer, Team, Guild, Tag, Board, HasLinkThing, A, B, C, D)
|
|
|
|
|
|
class GenericRelationTests(TestCase):
|
|
|
|
def test_inherited_models_content_type(self):
|
|
"""
|
|
Test that GenericRelations on inherited classes use the correct content
|
|
type.
|
|
"""
|
|
|
|
p = Place.objects.create(name="South Park")
|
|
r = Restaurant.objects.create(name="Chubby's")
|
|
l1 = Link.objects.create(content_object=p)
|
|
l2 = Link.objects.create(content_object=r)
|
|
self.assertEqual(list(p.links.all()), [l1])
|
|
self.assertEqual(list(r.links.all()), [l2])
|
|
|
|
def test_reverse_relation_pk(self):
|
|
"""
|
|
Test that the correct column name is used for the primary key on the
|
|
originating model of a query. See #12664.
|
|
"""
|
|
p = Person.objects.create(account=23, name='Chef')
|
|
Address.objects.create(street='123 Anywhere Place',
|
|
city='Conifer', state='CO',
|
|
zipcode='80433', content_object=p)
|
|
|
|
qs = Person.objects.filter(addresses__zipcode='80433')
|
|
self.assertEqual(1, qs.count())
|
|
self.assertEqual('Chef', qs[0].name)
|
|
|
|
def test_charlink_delete(self):
|
|
oddrel = OddRelation1.objects.create(name='clink')
|
|
CharLink.objects.create(content_object=oddrel)
|
|
oddrel.delete()
|
|
|
|
def test_textlink_delete(self):
|
|
oddrel = OddRelation2.objects.create(name='tlink')
|
|
TextLink.objects.create(content_object=oddrel)
|
|
oddrel.delete()
|
|
|
|
def test_q_object_or(self):
|
|
"""
|
|
Tests that SQL query parameters for generic relations are properly
|
|
grouped when OR is used.
|
|
|
|
Test for bug http://code.djangoproject.com/ticket/11535
|
|
|
|
In this bug the first query (below) works while the second, with the
|
|
query parameters the same but in reverse order, does not.
|
|
|
|
The issue is that the generic relation conditions do not get properly
|
|
grouped in parentheses.
|
|
"""
|
|
note_contact = Contact.objects.create()
|
|
org_contact = Contact.objects.create()
|
|
Note.objects.create(note='note', content_object=note_contact)
|
|
org = Organization.objects.create(name='org name')
|
|
org.contacts.add(org_contact)
|
|
# search with a non-matching note and a matching org name
|
|
qs = Contact.objects.filter(Q(notes__note__icontains=r'other note') |
|
|
Q(organizations__name__icontains=r'org name'))
|
|
self.assertTrue(org_contact in qs)
|
|
# search again, with the same query parameters, in reverse order
|
|
qs = Contact.objects.filter(
|
|
Q(organizations__name__icontains=r'org name') |
|
|
Q(notes__note__icontains=r'other note'))
|
|
self.assertTrue(org_contact in qs)
|
|
|
|
def test_join_reuse(self):
|
|
qs = Person.objects.filter(
|
|
addresses__street='foo'
|
|
).filter(
|
|
addresses__street='bar'
|
|
)
|
|
self.assertEqual(str(qs.query).count('JOIN'), 2)
|
|
|
|
def test_generic_relation_ordering(self):
|
|
"""
|
|
Test that ordering over a generic relation does not include extraneous
|
|
duplicate results, nor excludes rows not participating in the relation.
|
|
"""
|
|
p1 = Place.objects.create(name="South Park")
|
|
p2 = Place.objects.create(name="The City")
|
|
c = Company.objects.create(name="Chubby's Intl.")
|
|
Link.objects.create(content_object=p1)
|
|
Link.objects.create(content_object=c)
|
|
|
|
places = list(Place.objects.order_by('links__id'))
|
|
|
|
def count_places(place):
|
|
return len([p for p in places if p.id == place.id])
|
|
|
|
self.assertEqual(len(places), 2)
|
|
self.assertEqual(count_places(p1), 1)
|
|
self.assertEqual(count_places(p2), 1)
|
|
|
|
def test_target_model_is_unsaved(self):
|
|
"""Test related to #13085"""
|
|
# Fails with another, ORM-level error
|
|
dev1 = Developer(name='Joe')
|
|
note = Note(note='Deserves promotion', content_object=dev1)
|
|
self.assertRaises(IntegrityError, note.save)
|
|
|
|
def test_target_model_len_zero(self):
|
|
"""Test for #13085 -- __len__() returns 0"""
|
|
team1 = Team.objects.create(name='Backend devs')
|
|
try:
|
|
note = Note(note='Deserve a bonus', content_object=team1)
|
|
except Exception as e:
|
|
if (issubclass(type(e), Exception) and
|
|
str(e) == 'Impossible arguments to GFK.get_content_type!'):
|
|
self.fail("Saving model with GenericForeignKey to model instance whose "
|
|
"__len__ method returns 0 shouldn't fail.")
|
|
raise e
|
|
note.save()
|
|
|
|
def test_target_model_nonzero_false(self):
|
|
"""Test related to #13085"""
|
|
# __nonzero__() returns False -- This actually doesn't currently fail.
|
|
# This test validates that
|
|
g1 = Guild.objects.create(name='First guild')
|
|
note = Note(note='Note for guild', content_object=g1)
|
|
note.save()
|
|
|
|
@skipIfDBFeature('interprets_empty_strings_as_nulls')
|
|
def test_gfk_to_model_with_empty_pk(self):
|
|
"""Test related to #13085"""
|
|
# Saving model with GenericForeignKey to model instance with an
|
|
# empty CharField PK
|
|
b1 = Board.objects.create(name='')
|
|
tag = Tag(label='VP', content_object=b1)
|
|
tag.save()
|
|
|
|
def test_ticket_20378(self):
|
|
hs1 = HasLinkThing.objects.create()
|
|
hs2 = HasLinkThing.objects.create()
|
|
l1 = Link.objects.create(content_object=hs1)
|
|
l2 = Link.objects.create(content_object=hs2)
|
|
self.assertQuerysetEqual(
|
|
HasLinkThing.objects.filter(links=l1),
|
|
[hs1], lambda x: x)
|
|
self.assertQuerysetEqual(
|
|
HasLinkThing.objects.filter(links=l2),
|
|
[hs2], lambda x: x)
|
|
self.assertQuerysetEqual(
|
|
HasLinkThing.objects.exclude(links=l2),
|
|
[hs1], lambda x: x)
|
|
self.assertQuerysetEqual(
|
|
HasLinkThing.objects.exclude(links=l1),
|
|
[hs2], lambda x: x)
|
|
|
|
def test_ticket_20564(self):
|
|
b1 = B.objects.create()
|
|
b2 = B.objects.create()
|
|
b3 = B.objects.create()
|
|
c1 = C.objects.create(b=b1)
|
|
c2 = C.objects.create(b=b2)
|
|
c3 = C.objects.create(b=b3)
|
|
A.objects.create(flag=None, content_object=b1)
|
|
A.objects.create(flag=True, content_object=b2)
|
|
self.assertQuerysetEqual(
|
|
C.objects.filter(b__a__flag=None),
|
|
[c1, c3], lambda x: x
|
|
)
|
|
self.assertQuerysetEqual(
|
|
C.objects.exclude(b__a__flag=None),
|
|
[c2], lambda x: x
|
|
)
|
|
|
|
def test_ticket_20564_nullable_fk(self):
|
|
b1 = B.objects.create()
|
|
b2 = B.objects.create()
|
|
b3 = B.objects.create()
|
|
d1 = D.objects.create(b=b1)
|
|
d2 = D.objects.create(b=b2)
|
|
d3 = D.objects.create(b=b3)
|
|
d4 = D.objects.create()
|
|
A.objects.create(flag=None, content_object=b1)
|
|
A.objects.create(flag=True, content_object=b1)
|
|
A.objects.create(flag=True, content_object=b2)
|
|
self.assertQuerysetEqual(
|
|
D.objects.exclude(b__a__flag=None),
|
|
[d2], lambda x: x
|
|
)
|
|
self.assertQuerysetEqual(
|
|
D.objects.filter(b__a__flag=None),
|
|
[d1, d3, d4], lambda x: x
|
|
)
|
|
self.assertQuerysetEqual(
|
|
B.objects.filter(a__flag=None),
|
|
[b1, b3], lambda x: x
|
|
)
|
|
self.assertQuerysetEqual(
|
|
B.objects.exclude(a__flag=None),
|
|
[b2], lambda x: x
|
|
)
|
|
|
|
def test_extra_join_condition(self):
|
|
# A crude check that content_type_id is taken in account in the
|
|
# join/subquery condition.
|
|
self.assertIn("content_type_id", str(B.objects.exclude(a__flag=None).query).lower())
|
|
# No need for any joins - the join from inner query can be trimmed in
|
|
# this case (but not in the above case as no a objects at all for given
|
|
# B would then fail).
|
|
self.assertNotIn(" join ", str(B.objects.exclude(a__flag=True).query).lower())
|
|
self.assertIn("content_type_id", str(B.objects.exclude(a__flag=True).query).lower())
|
|
|
|
def test_annotate(self):
|
|
hs1 = HasLinkThing.objects.create()
|
|
b = Board.objects.create(name=str(hs1.pk))
|
|
l = Link.objects.create(content_object=hs1)
|
|
Link.objects.create(content_object=b)
|
|
qs = HasLinkThing.objects.annotate(Sum('links'))
|
|
# If content_type restriction isn't in the query's join condition,
|
|
# then wrong results are produced here as the link to b will also match
|
|
# (b and hs1 have equal pks).
|
|
self.assertEqual(qs.count(), 1)
|
|
self.assertEqual(qs[0].links__sum, l.id)
|
|
l.delete()
|
|
# Now if we don't have proper left join, we will not produce any
|
|
# results at all here.
|
|
# clear cached results
|
|
qs = qs.all()
|
|
self.assertEqual(qs.count(), 1)
|
|
# Note - 0 here would be a nicer result...
|
|
self.assertIs(qs[0].links__sum, None)
|
|
# Finally test that filtering works.
|
|
self.assertEqual(qs.filter(links__sum__isnull=True).count(), 1)
|
|
self.assertEqual(qs.filter(links__sum__isnull=False).count(), 0)
|
|
|
|
def test_editable_generic_rel(self):
|
|
GenericRelationForm = modelform_factory(HasLinkThing, fields='__all__')
|
|
form = GenericRelationForm()
|
|
self.assertIn('links', form.fields)
|
|
form = GenericRelationForm({'links': None})
|
|
self.assertTrue(form.is_valid())
|
|
form.save()
|
|
links = HasLinkThing._meta.get_field_by_name('links')[0]
|
|
self.assertEqual(links.save_form_data_calls, 1)
|