644 lines
27 KiB
Python
644 lines
27 KiB
Python
from unittest import mock
|
|
|
|
from django.db import transaction
|
|
from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature
|
|
|
|
from .models import (
|
|
Article, InheritedArticleA, InheritedArticleB, Publication, User,
|
|
)
|
|
|
|
|
|
class ManyToManyTests(TestCase):
|
|
|
|
def setUp(self):
|
|
# Create a couple of Publications.
|
|
self.p1 = Publication.objects.create(title='The Python Journal')
|
|
self.p2 = Publication.objects.create(title='Science News')
|
|
self.p3 = Publication.objects.create(title='Science Weekly')
|
|
self.p4 = Publication.objects.create(title='Highlights for Children')
|
|
|
|
self.a1 = Article.objects.create(headline='Django lets you build Web apps easily')
|
|
self.a1.publications.add(self.p1)
|
|
|
|
self.a2 = Article.objects.create(headline='NASA uses Python')
|
|
self.a2.publications.add(self.p1, self.p2, self.p3, self.p4)
|
|
|
|
self.a3 = Article.objects.create(headline='NASA finds intelligent life on Earth')
|
|
self.a3.publications.add(self.p2)
|
|
|
|
self.a4 = Article.objects.create(headline='Oxygen-free diet works wonders')
|
|
self.a4.publications.add(self.p2)
|
|
|
|
def test_add(self):
|
|
# Create an Article.
|
|
a5 = Article(headline='Django lets you create Web apps easily')
|
|
# You can't associate it with a Publication until it's been saved.
|
|
msg = (
|
|
'"<Article: Django lets you create Web apps easily>" needs to have '
|
|
'a value for field "id" before this many-to-many relationship can be used.'
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
getattr(a5, 'publications')
|
|
# Save it!
|
|
a5.save()
|
|
# Associate the Article with a Publication.
|
|
a5.publications.add(self.p1)
|
|
self.assertQuerysetEqual(a5.publications.all(), ['<Publication: The Python Journal>'])
|
|
# Create another Article, and set it to appear in both Publications.
|
|
a6 = Article(headline='ESA uses Python')
|
|
a6.save()
|
|
a6.publications.add(self.p1, self.p2)
|
|
a6.publications.add(self.p3)
|
|
# Adding a second time is OK
|
|
a6.publications.add(self.p3)
|
|
self.assertQuerysetEqual(
|
|
a6.publications.all(),
|
|
[
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
|
|
# Adding an object of the wrong type raises TypeError
|
|
msg = "'Publication' instance expected, got <Article: Django lets you create Web apps easily>"
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
with transaction.atomic():
|
|
a6.publications.add(a5)
|
|
|
|
# Add a Publication directly via publications.add by using keyword arguments.
|
|
a6.publications.create(title='Highlights for Adults')
|
|
self.assertQuerysetEqual(
|
|
a6.publications.all(),
|
|
[
|
|
'<Publication: Highlights for Adults>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
|
|
def test_add_remove_set_by_pk(self):
|
|
a5 = Article.objects.create(headline='Django lets you create Web apps easily')
|
|
a5.publications.add(self.p1.pk)
|
|
self.assertQuerysetEqual(
|
|
a5.publications.all(),
|
|
['<Publication: The Python Journal>'],
|
|
)
|
|
a5.publications.set([self.p2.pk])
|
|
self.assertQuerysetEqual(
|
|
a5.publications.all(),
|
|
['<Publication: Science News>'],
|
|
)
|
|
a5.publications.remove(self.p2.pk)
|
|
self.assertQuerysetEqual(a5.publications.all(), [])
|
|
|
|
def test_add_remove_set_by_to_field(self):
|
|
user_1 = User.objects.create(username='Jean')
|
|
user_2 = User.objects.create(username='Joe')
|
|
a5 = Article.objects.create(headline='Django lets you create Web apps easily')
|
|
a5.authors.add(user_1.username)
|
|
self.assertQuerysetEqual(a5.authors.all(), ['<User: Jean>'])
|
|
a5.authors.set([user_2.username])
|
|
self.assertQuerysetEqual(a5.authors.all(), ['<User: Joe>'])
|
|
a5.authors.remove(user_2.username)
|
|
self.assertQuerysetEqual(a5.authors.all(), [])
|
|
|
|
def test_add_remove_invalid_type(self):
|
|
msg = "Field 'id' expected a number but got 'invalid'."
|
|
for method in ['add', 'remove']:
|
|
with self.subTest(method), self.assertRaisesMessage(ValueError, msg):
|
|
getattr(self.a1.publications, method)('invalid')
|
|
|
|
def test_reverse_add(self):
|
|
# Adding via the 'other' end of an m2m
|
|
a5 = Article(headline='NASA finds intelligent life on Mars')
|
|
a5.save()
|
|
self.p2.article_set.add(a5)
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA finds intelligent life on Mars>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(a5.publications.all(), ['<Publication: Science News>'])
|
|
|
|
# Adding via the other end using keywords
|
|
self.p2.article_set.create(headline='Carbon-free diet works wonders')
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: Carbon-free diet works wonders>',
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA finds intelligent life on Mars>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
])
|
|
a6 = self.p2.article_set.all()[3]
|
|
self.assertQuerysetEqual(
|
|
a6.publications.all(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
|
|
@skipUnlessDBFeature('supports_ignore_conflicts')
|
|
def test_fast_add_ignore_conflicts(self):
|
|
"""
|
|
A single query is necessary to add auto-created through instances if
|
|
the database backend supports bulk_create(ignore_conflicts) and no
|
|
m2m_changed signals receivers are connected.
|
|
"""
|
|
with self.assertNumQueries(1):
|
|
self.a1.publications.add(self.p1, self.p2)
|
|
|
|
@skipIfDBFeature('supports_ignore_conflicts')
|
|
def test_add_existing_different_type(self):
|
|
# A single SELECT query is necessary to compare existing values to the
|
|
# provided one; no INSERT should be attempted.
|
|
with self.assertNumQueries(1):
|
|
self.a1.publications.add(str(self.p1.pk))
|
|
self.assertEqual(self.a1.publications.get(), self.p1)
|
|
|
|
@skipUnlessDBFeature('supports_ignore_conflicts')
|
|
def test_slow_add_ignore_conflicts(self):
|
|
manager_cls = self.a1.publications.__class__
|
|
# Simulate a race condition between the missing ids retrieval and
|
|
# the bulk insertion attempt.
|
|
missing_target_ids = {self.p1.id}
|
|
# Disable fast-add to test the case where the slow add path is taken.
|
|
add_plan = (True, False, False)
|
|
with mock.patch.object(manager_cls, '_get_missing_target_ids', return_value=missing_target_ids) as mocked:
|
|
with mock.patch.object(manager_cls, '_get_add_plan', return_value=add_plan):
|
|
self.a1.publications.add(self.p1)
|
|
mocked.assert_called_once()
|
|
|
|
def test_related_sets(self):
|
|
# Article objects have access to their related Publication objects.
|
|
self.assertQuerysetEqual(self.a1.publications.all(), ['<Publication: The Python Journal>'])
|
|
self.assertQuerysetEqual(
|
|
self.a2.publications.all(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
# Publication objects have access to their related Article objects.
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
self.p1.article_set.all(),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA uses Python>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.get(id=self.p4.id).article_set.all(),
|
|
['<Article: NASA uses Python>']
|
|
)
|
|
|
|
def test_selects(self):
|
|
# We can perform kwarg queries across m2m relationships
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__id__exact=self.p1.id),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA uses Python>',
|
|
])
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__pk=self.p1.id),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA uses Python>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications=self.p1.id),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA uses Python>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications=self.p1),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA uses Python>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__title__startswith="Science"),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__title__startswith="Science").distinct(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
|
|
# The count() function respects distinct() as well.
|
|
self.assertEqual(Article.objects.filter(publications__title__startswith="Science").count(), 4)
|
|
self.assertEqual(Article.objects.filter(publications__title__startswith="Science").distinct().count(), 3)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__in=[self.p1.id, self.p2.id]).distinct(),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
])
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__in=[self.p1.id, self.p2]).distinct(),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.filter(publications__in=[self.p1, self.p2]).distinct(),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
|
|
# Excluding a related item works as you would expect, too (although the SQL
|
|
# involved is a little complex).
|
|
self.assertQuerysetEqual(
|
|
Article.objects.exclude(publications=self.p2),
|
|
['<Article: Django lets you build Web apps easily>']
|
|
)
|
|
|
|
def test_reverse_selects(self):
|
|
# Reverse m2m queries are supported (i.e., starting at the table that
|
|
# doesn't have a ManyToManyField).
|
|
python_journal = ['<Publication: The Python Journal>']
|
|
self.assertQuerysetEqual(Publication.objects.filter(id__exact=self.p1.id), python_journal)
|
|
self.assertQuerysetEqual(Publication.objects.filter(pk=self.p1.id), python_journal)
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.filter(article__headline__startswith="NASA"),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
])
|
|
|
|
self.assertQuerysetEqual(Publication.objects.filter(article__id__exact=self.a1.id), python_journal)
|
|
self.assertQuerysetEqual(Publication.objects.filter(article__pk=self.a1.id), python_journal)
|
|
self.assertQuerysetEqual(Publication.objects.filter(article=self.a1.id), python_journal)
|
|
self.assertQuerysetEqual(Publication.objects.filter(article=self.a1), python_journal)
|
|
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.filter(article__in=[self.a1.id, self.a2.id]).distinct(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
])
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.filter(article__in=[self.a1.id, self.a2]).distinct(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
])
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.filter(article__in=[self.a1, self.a2]).distinct(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
'<Publication: The Python Journal>',
|
|
])
|
|
|
|
def test_delete(self):
|
|
# If we delete a Publication, its Articles won't be able to access it.
|
|
self.p1.delete()
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.all(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: Science News>',
|
|
'<Publication: Science Weekly>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a1.publications.all(), [])
|
|
# If we delete an Article, its Publications won't be able to access it.
|
|
self.a2.delete()
|
|
self.assertQuerysetEqual(
|
|
Article.objects.all(),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
|
|
def test_bulk_delete(self):
|
|
# Bulk delete some Publications - references to deleted publications should go
|
|
Publication.objects.filter(title__startswith='Science').delete()
|
|
self.assertQuerysetEqual(
|
|
Publication.objects.all(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Article.objects.all(),
|
|
[
|
|
'<Article: Django lets you build Web apps easily>',
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
self.a2.publications.all(),
|
|
[
|
|
'<Publication: Highlights for Children>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
|
|
# Bulk delete some articles - references to deleted objects should go
|
|
q = Article.objects.filter(headline__startswith='Django')
|
|
self.assertQuerysetEqual(q, ['<Article: Django lets you build Web apps easily>'])
|
|
q.delete()
|
|
# After the delete, the QuerySet cache needs to be cleared,
|
|
# and the referenced objects should be gone
|
|
self.assertQuerysetEqual(q, [])
|
|
self.assertQuerysetEqual(self.p1.article_set.all(), ['<Article: NASA uses Python>'])
|
|
|
|
def test_remove(self):
|
|
# Removing publication from an article:
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.a4.publications.remove(self.p2)
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: NASA uses Python>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), [])
|
|
# And from the other end
|
|
self.p2.article_set.remove(self.a3)
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), ['<Article: NASA uses Python>'])
|
|
self.assertQuerysetEqual(self.a3.publications.all(), [])
|
|
|
|
def test_set(self):
|
|
self.p2.article_set.set([self.a4, self.a3])
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science News>'])
|
|
self.a4.publications.set([self.p3.id])
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), ['<Article: NASA finds intelligent life on Earth>'])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science Weekly>'])
|
|
|
|
self.p2.article_set.set([])
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), [])
|
|
self.a4.publications.set([])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), [])
|
|
|
|
self.p2.article_set.set([self.a4, self.a3], clear=True)
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science News>'])
|
|
self.a4.publications.set([self.p3.id], clear=True)
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), ['<Article: NASA finds intelligent life on Earth>'])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science Weekly>'])
|
|
|
|
self.p2.article_set.set([], clear=True)
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), [])
|
|
self.a4.publications.set([], clear=True)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), [])
|
|
|
|
def test_set_existing_different_type(self):
|
|
# Existing many-to-many relations remain the same for values provided
|
|
# with a different type.
|
|
ids = set(Publication.article_set.through.objects.filter(
|
|
article__in=[self.a4, self.a3],
|
|
publication=self.p2,
|
|
).values_list('id', flat=True))
|
|
self.p2.article_set.set([str(self.a4.pk), str(self.a3.pk)])
|
|
new_ids = set(Publication.article_set.through.objects.filter(
|
|
publication=self.p2,
|
|
).values_list('id', flat=True))
|
|
self.assertEqual(ids, new_ids)
|
|
|
|
def test_assign_forward(self):
|
|
msg = (
|
|
"Direct assignment to the reverse side of a many-to-many set is "
|
|
"prohibited. Use article_set.set() instead."
|
|
)
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
self.p2.article_set = [self.a4, self.a3]
|
|
|
|
def test_assign_reverse(self):
|
|
msg = (
|
|
"Direct assignment to the forward side of a many-to-many "
|
|
"set is prohibited. Use publications.set() instead."
|
|
)
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
self.a1.publications = [self.p1, self.p2]
|
|
|
|
def test_assign(self):
|
|
# Relation sets can be assigned using set().
|
|
self.p2.article_set.set([self.a4, self.a3])
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(), [
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science News>'])
|
|
self.a4.publications.set([self.p3.id])
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), ['<Article: NASA finds intelligent life on Earth>'])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science Weekly>'])
|
|
|
|
# An alternate to calling clear() is to set an empty set.
|
|
self.p2.article_set.set([])
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), [])
|
|
self.a4.publications.set([])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), [])
|
|
|
|
def test_assign_ids(self):
|
|
# Relation sets can also be set using primary key values
|
|
self.p2.article_set.set([self.a4.id, self.a3.id])
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science News>'])
|
|
self.a4.publications.set([self.p3.id])
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), ['<Article: NASA finds intelligent life on Earth>'])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science Weekly>'])
|
|
|
|
def test_forward_assign_with_queryset(self):
|
|
# Querysets used in m2m assignments are pre-evaluated so their value
|
|
# isn't affected by the clearing operation in ManyRelatedManager.set()
|
|
# (#19816).
|
|
self.a1.publications.set([self.p1, self.p2])
|
|
|
|
qs = self.a1.publications.filter(title='The Python Journal')
|
|
self.a1.publications.set(qs)
|
|
|
|
self.assertEqual(1, self.a1.publications.count())
|
|
self.assertEqual(1, qs.count())
|
|
|
|
def test_reverse_assign_with_queryset(self):
|
|
# Querysets used in M2M assignments are pre-evaluated so their value
|
|
# isn't affected by the clearing operation in ManyRelatedManager.set()
|
|
# (#19816).
|
|
self.p1.article_set.set([self.a1, self.a2])
|
|
|
|
qs = self.p1.article_set.filter(headline='Django lets you build Web apps easily')
|
|
self.p1.article_set.set(qs)
|
|
|
|
self.assertEqual(1, self.p1.article_set.count())
|
|
self.assertEqual(1, qs.count())
|
|
|
|
def test_clear(self):
|
|
# Relation sets can be cleared:
|
|
self.p2.article_set.clear()
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), [])
|
|
self.assertQuerysetEqual(self.a4.publications.all(), [])
|
|
|
|
# And you can clear from the other end
|
|
self.p2.article_set.add(self.a3, self.a4)
|
|
self.assertQuerysetEqual(
|
|
self.p2.article_set.all(),
|
|
[
|
|
'<Article: NASA finds intelligent life on Earth>',
|
|
'<Article: Oxygen-free diet works wonders>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(self.a4.publications.all(), ['<Publication: Science News>'])
|
|
self.a4.publications.clear()
|
|
self.assertQuerysetEqual(self.a4.publications.all(), [])
|
|
self.assertQuerysetEqual(self.p2.article_set.all(), ['<Article: NASA finds intelligent life on Earth>'])
|
|
|
|
def test_clear_after_prefetch(self):
|
|
a4 = Article.objects.prefetch_related('publications').get(id=self.a4.id)
|
|
self.assertQuerysetEqual(a4.publications.all(), ['<Publication: Science News>'])
|
|
a4.publications.clear()
|
|
self.assertQuerysetEqual(a4.publications.all(), [])
|
|
|
|
def test_remove_after_prefetch(self):
|
|
a4 = Article.objects.prefetch_related('publications').get(id=self.a4.id)
|
|
self.assertQuerysetEqual(a4.publications.all(), ['<Publication: Science News>'])
|
|
a4.publications.remove(self.p2)
|
|
self.assertQuerysetEqual(a4.publications.all(), [])
|
|
|
|
def test_add_after_prefetch(self):
|
|
a4 = Article.objects.prefetch_related('publications').get(id=self.a4.id)
|
|
self.assertEqual(a4.publications.count(), 1)
|
|
a4.publications.add(self.p1)
|
|
self.assertEqual(a4.publications.count(), 2)
|
|
|
|
def test_set_after_prefetch(self):
|
|
a4 = Article.objects.prefetch_related('publications').get(id=self.a4.id)
|
|
self.assertEqual(a4.publications.count(), 1)
|
|
a4.publications.set([self.p2, self.p1])
|
|
self.assertEqual(a4.publications.count(), 2)
|
|
a4.publications.set([self.p1])
|
|
self.assertEqual(a4.publications.count(), 1)
|
|
|
|
def test_add_then_remove_after_prefetch(self):
|
|
a4 = Article.objects.prefetch_related('publications').get(id=self.a4.id)
|
|
self.assertEqual(a4.publications.count(), 1)
|
|
a4.publications.add(self.p1)
|
|
self.assertEqual(a4.publications.count(), 2)
|
|
a4.publications.remove(self.p1)
|
|
self.assertQuerysetEqual(a4.publications.all(), ['<Publication: Science News>'])
|
|
|
|
def test_inherited_models_selects(self):
|
|
"""
|
|
#24156 - Objects from child models where the parent's m2m field uses
|
|
related_name='+' should be retrieved correctly.
|
|
"""
|
|
a = InheritedArticleA.objects.create()
|
|
b = InheritedArticleB.objects.create()
|
|
a.publications.add(self.p1, self.p2)
|
|
self.assertQuerysetEqual(
|
|
a.publications.all(),
|
|
[
|
|
'<Publication: Science News>',
|
|
'<Publication: The Python Journal>',
|
|
])
|
|
self.assertQuerysetEqual(b.publications.all(), [])
|
|
b.publications.add(self.p3)
|
|
self.assertQuerysetEqual(
|
|
a.publications.all(),
|
|
[
|
|
'<Publication: Science News>',
|
|
'<Publication: The Python Journal>',
|
|
]
|
|
)
|
|
self.assertQuerysetEqual(b.publications.all(), ['<Publication: Science Weekly>'])
|
|
|
|
def test_custom_default_manager_exists_count(self):
|
|
a5 = Article.objects.create(headline='deleted')
|
|
a5.publications.add(self.p2)
|
|
self.assertEqual(self.p2.article_set.count(), self.p2.article_set.all().count())
|
|
self.assertEqual(self.p3.article_set.exists(), self.p3.article_set.all().exists())
|