mirror of
https://github.com/django/django.git
synced 2024-11-25 07:59:34 +01:00
847f46e9bf
Most QuerySet methods are mapped onto the Manager and, in general, it isn't necessary to call .all() on the manager.
692 lines
26 KiB
Python
692 lines
26 KiB
Python
import copy
|
|
import datetime
|
|
import pickle
|
|
from operator import attrgetter
|
|
|
|
from django.core.exceptions import FieldError
|
|
from django.db import models
|
|
from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature
|
|
from django.test.utils import isolate_apps
|
|
from django.utils import translation
|
|
|
|
from .models import (
|
|
Article,
|
|
ArticleIdea,
|
|
ArticleTag,
|
|
ArticleTranslation,
|
|
Country,
|
|
Friendship,
|
|
Group,
|
|
Membership,
|
|
NewsArticle,
|
|
Person,
|
|
)
|
|
|
|
# Note that these tests are testing internal implementation details.
|
|
# ForeignObject is not part of public API.
|
|
|
|
|
|
class MultiColumnFKTests(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
# Creating countries
|
|
cls.usa = Country.objects.create(name="United States of America")
|
|
cls.soviet_union = Country.objects.create(name="Soviet Union")
|
|
# Creating People
|
|
cls.bob = Person.objects.create(name="Bob", person_country=cls.usa)
|
|
cls.jim = Person.objects.create(name="Jim", person_country=cls.usa)
|
|
cls.george = Person.objects.create(name="George", person_country=cls.usa)
|
|
|
|
cls.jane = Person.objects.create(name="Jane", person_country=cls.soviet_union)
|
|
cls.mark = Person.objects.create(name="Mark", person_country=cls.soviet_union)
|
|
cls.sam = Person.objects.create(name="Sam", person_country=cls.soviet_union)
|
|
|
|
# Creating Groups
|
|
cls.kgb = Group.objects.create(name="KGB", group_country=cls.soviet_union)
|
|
cls.cia = Group.objects.create(name="CIA", group_country=cls.usa)
|
|
cls.republican = Group.objects.create(name="Republican", group_country=cls.usa)
|
|
cls.democrat = Group.objects.create(name="Democrat", group_country=cls.usa)
|
|
|
|
def test_get_succeeds_on_multicolumn_match(self):
|
|
# Membership objects have access to their related Person if both
|
|
# country_ids match between them
|
|
membership = Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
person = membership.person
|
|
self.assertEqual((person.id, person.name), (self.bob.id, "Bob"))
|
|
|
|
def test_get_fails_on_multicolumn_mismatch(self):
|
|
# Membership objects returns DoesNotExist error when there is no
|
|
# Person with the same id and country_id
|
|
membership = Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.jane.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
with self.assertRaises(Person.DoesNotExist):
|
|
getattr(membership, "person")
|
|
|
|
def test_reverse_query_returns_correct_result(self):
|
|
# Creating a valid membership because it has the same country has the person
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
# Creating an invalid membership because it has a different country has
|
|
# the person.
|
|
Membership.objects.create(
|
|
membership_country_id=self.soviet_union.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.republican.id,
|
|
)
|
|
|
|
with self.assertNumQueries(1):
|
|
membership = self.bob.membership_set.get()
|
|
self.assertEqual(membership.group_id, self.cia.id)
|
|
self.assertIs(membership.person, self.bob)
|
|
|
|
def test_query_filters_correctly(self):
|
|
|
|
# Creating a to valid memberships
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.jim.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
# Creating an invalid membership
|
|
Membership.objects.create(
|
|
membership_country_id=self.soviet_union.id,
|
|
person_id=self.george.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
self.assertQuerysetEqual(
|
|
Membership.objects.filter(person__name__contains="o"),
|
|
[self.bob.id],
|
|
attrgetter("person_id"),
|
|
)
|
|
|
|
def test_reverse_query_filters_correctly(self):
|
|
|
|
timemark = datetime.datetime.now(tz=datetime.timezone.utc).replace(tzinfo=None)
|
|
timedelta = datetime.timedelta(days=1)
|
|
|
|
# Creating a to valid memberships
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.cia.id,
|
|
date_joined=timemark - timedelta,
|
|
)
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.jim.id,
|
|
group_id=self.cia.id,
|
|
date_joined=timemark + timedelta,
|
|
)
|
|
|
|
# Creating an invalid membership
|
|
Membership.objects.create(
|
|
membership_country_id=self.soviet_union.id,
|
|
person_id=self.george.id,
|
|
group_id=self.cia.id,
|
|
date_joined=timemark + timedelta,
|
|
)
|
|
|
|
self.assertQuerysetEqual(
|
|
Person.objects.filter(membership__date_joined__gte=timemark),
|
|
["Jim"],
|
|
attrgetter("name"),
|
|
)
|
|
|
|
def test_forward_in_lookup_filters_correctly(self):
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.jim.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
# Creating an invalid membership
|
|
Membership.objects.create(
|
|
membership_country_id=self.soviet_union.id,
|
|
person_id=self.george.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
|
|
self.assertQuerysetEqual(
|
|
Membership.objects.filter(person__in=[self.george, self.jim]),
|
|
[
|
|
self.jim.id,
|
|
],
|
|
attrgetter("person_id"),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Membership.objects.filter(person__in=Person.objects.filter(name="Jim")),
|
|
[
|
|
self.jim.id,
|
|
],
|
|
attrgetter("person_id"),
|
|
)
|
|
|
|
def test_double_nested_query(self):
|
|
m1 = Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.bob.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
m2 = Membership.objects.create(
|
|
membership_country_id=self.usa.id,
|
|
person_id=self.jim.id,
|
|
group_id=self.cia.id,
|
|
)
|
|
Friendship.objects.create(
|
|
from_friend_country_id=self.usa.id,
|
|
from_friend_id=self.bob.id,
|
|
to_friend_country_id=self.usa.id,
|
|
to_friend_id=self.jim.id,
|
|
)
|
|
self.assertSequenceEqual(
|
|
Membership.objects.filter(
|
|
person__in=Person.objects.filter(
|
|
from_friend__in=Friendship.objects.filter(
|
|
to_friend__in=Person.objects.all()
|
|
)
|
|
)
|
|
),
|
|
[m1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Membership.objects.exclude(
|
|
person__in=Person.objects.filter(
|
|
from_friend__in=Friendship.objects.filter(
|
|
to_friend__in=Person.objects.all()
|
|
)
|
|
)
|
|
),
|
|
[m2],
|
|
)
|
|
|
|
def test_select_related_foreignkey_forward_works(self):
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jim, group=self.democrat
|
|
)
|
|
|
|
with self.assertNumQueries(1):
|
|
people = [
|
|
m.person
|
|
for m in Membership.objects.select_related("person").order_by("pk")
|
|
]
|
|
|
|
normal_people = [m.person for m in Membership.objects.order_by("pk")]
|
|
self.assertEqual(people, normal_people)
|
|
|
|
def test_prefetch_foreignkey_forward_works(self):
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jim, group=self.democrat
|
|
)
|
|
|
|
with self.assertNumQueries(2):
|
|
people = [
|
|
m.person
|
|
for m in Membership.objects.prefetch_related("person").order_by("pk")
|
|
]
|
|
|
|
normal_people = [m.person for m in Membership.objects.order_by("pk")]
|
|
self.assertEqual(people, normal_people)
|
|
|
|
def test_prefetch_foreignkey_reverse_works(self):
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jim, group=self.democrat
|
|
)
|
|
with self.assertNumQueries(2):
|
|
membership_sets = [
|
|
list(p.membership_set.all())
|
|
for p in Person.objects.prefetch_related("membership_set").order_by(
|
|
"pk"
|
|
)
|
|
]
|
|
|
|
with self.assertNumQueries(7):
|
|
normal_membership_sets = [
|
|
list(p.membership_set.all()) for p in Person.objects.order_by("pk")
|
|
]
|
|
self.assertEqual(membership_sets, normal_membership_sets)
|
|
|
|
def test_m2m_through_forward_returns_valid_members(self):
|
|
# We start out by making sure that the Group 'CIA' has no members.
|
|
self.assertQuerysetEqual(self.cia.members.all(), [])
|
|
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jim, group=self.cia
|
|
)
|
|
|
|
# Bob and Jim should be members of the CIA.
|
|
|
|
self.assertQuerysetEqual(
|
|
self.cia.members.all(), ["Bob", "Jim"], attrgetter("name")
|
|
)
|
|
|
|
def test_m2m_through_reverse_returns_valid_members(self):
|
|
# We start out by making sure that Bob is in no groups.
|
|
self.assertQuerysetEqual(self.bob.groups.all(), [])
|
|
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.republican
|
|
)
|
|
|
|
# Bob should be in the CIA and a Republican
|
|
self.assertQuerysetEqual(
|
|
self.bob.groups.all(), ["CIA", "Republican"], attrgetter("name")
|
|
)
|
|
|
|
def test_m2m_through_forward_ignores_invalid_members(self):
|
|
# We start out by making sure that the Group 'CIA' has no members.
|
|
self.assertQuerysetEqual(self.cia.members.all(), [])
|
|
|
|
# Something adds jane to group CIA but Jane is in Soviet Union which
|
|
# isn't CIA's country.
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jane, group=self.cia
|
|
)
|
|
|
|
# There should still be no members in CIA
|
|
self.assertQuerysetEqual(self.cia.members.all(), [])
|
|
|
|
def test_m2m_through_reverse_ignores_invalid_members(self):
|
|
# We start out by making sure that Jane has no groups.
|
|
self.assertQuerysetEqual(self.jane.groups.all(), [])
|
|
|
|
# Something adds jane to group CIA but Jane is in Soviet Union which
|
|
# isn't CIA's country.
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jane, group=self.cia
|
|
)
|
|
|
|
# Jane should still not be in any groups
|
|
self.assertQuerysetEqual(self.jane.groups.all(), [])
|
|
|
|
def test_m2m_through_on_self_works(self):
|
|
self.assertQuerysetEqual(self.jane.friends.all(), [])
|
|
|
|
Friendship.objects.create(
|
|
from_friend_country=self.jane.person_country,
|
|
from_friend=self.jane,
|
|
to_friend_country=self.george.person_country,
|
|
to_friend=self.george,
|
|
)
|
|
|
|
self.assertQuerysetEqual(
|
|
self.jane.friends.all(), ["George"], attrgetter("name")
|
|
)
|
|
|
|
def test_m2m_through_on_self_ignores_mismatch_columns(self):
|
|
self.assertQuerysetEqual(self.jane.friends.all(), [])
|
|
|
|
# Note that we use ids instead of instances. This is because instances
|
|
# on ForeignObject properties will set all related field off of the
|
|
# given instance.
|
|
Friendship.objects.create(
|
|
from_friend_id=self.jane.id,
|
|
to_friend_id=self.george.id,
|
|
to_friend_country_id=self.jane.person_country_id,
|
|
from_friend_country_id=self.george.person_country_id,
|
|
)
|
|
|
|
self.assertQuerysetEqual(self.jane.friends.all(), [])
|
|
|
|
def test_prefetch_related_m2m_forward_works(self):
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jim, group=self.democrat
|
|
)
|
|
|
|
with self.assertNumQueries(2):
|
|
members_lists = [
|
|
list(g.members.all()) for g in Group.objects.prefetch_related("members")
|
|
]
|
|
|
|
normal_members_lists = [list(g.members.all()) for g in Group.objects.all()]
|
|
self.assertEqual(members_lists, normal_members_lists)
|
|
|
|
def test_prefetch_related_m2m_reverse_works(self):
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
Membership.objects.create(
|
|
membership_country=self.usa, person=self.jim, group=self.democrat
|
|
)
|
|
|
|
with self.assertNumQueries(2):
|
|
groups_lists = [
|
|
list(p.groups.all()) for p in Person.objects.prefetch_related("groups")
|
|
]
|
|
|
|
normal_groups_lists = [list(p.groups.all()) for p in Person.objects.all()]
|
|
self.assertEqual(groups_lists, normal_groups_lists)
|
|
|
|
@translation.override("fi")
|
|
def test_translations(self):
|
|
a1 = Article.objects.create(pub_date=datetime.date.today())
|
|
at1_fi = ArticleTranslation(
|
|
article=a1, lang="fi", title="Otsikko", body="Diipadaapa"
|
|
)
|
|
at1_fi.save()
|
|
at2_en = ArticleTranslation(
|
|
article=a1, lang="en", title="Title", body="Lalalalala"
|
|
)
|
|
at2_en.save()
|
|
|
|
self.assertEqual(Article.objects.get(pk=a1.pk).active_translation, at1_fi)
|
|
|
|
with self.assertNumQueries(1):
|
|
fetched = Article.objects.select_related("active_translation").get(
|
|
active_translation__title="Otsikko"
|
|
)
|
|
self.assertEqual(fetched.active_translation.title, "Otsikko")
|
|
a2 = Article.objects.create(pub_date=datetime.date.today())
|
|
at2_fi = ArticleTranslation(
|
|
article=a2, lang="fi", title="Atsikko", body="Diipadaapa", abstract="dipad"
|
|
)
|
|
at2_fi.save()
|
|
a3 = Article.objects.create(pub_date=datetime.date.today())
|
|
at3_en = ArticleTranslation(
|
|
article=a3, lang="en", title="A title", body="lalalalala", abstract="lala"
|
|
)
|
|
at3_en.save()
|
|
# Test model initialization with active_translation field.
|
|
a3 = Article(id=a3.id, pub_date=a3.pub_date, active_translation=at3_en)
|
|
a3.save()
|
|
self.assertEqual(
|
|
list(Article.objects.filter(active_translation__abstract=None)), [a1, a3]
|
|
)
|
|
self.assertEqual(
|
|
list(
|
|
Article.objects.filter(
|
|
active_translation__abstract=None,
|
|
active_translation__pk__isnull=False,
|
|
)
|
|
),
|
|
[a1],
|
|
)
|
|
|
|
with translation.override("en"):
|
|
self.assertEqual(
|
|
list(Article.objects.filter(active_translation__abstract=None)),
|
|
[a1, a2],
|
|
)
|
|
|
|
def test_foreign_key_raises_informative_does_not_exist(self):
|
|
referrer = ArticleTranslation()
|
|
with self.assertRaisesMessage(
|
|
Article.DoesNotExist, "ArticleTranslation has no article"
|
|
):
|
|
referrer.article
|
|
|
|
def test_foreign_key_related_query_name(self):
|
|
a1 = Article.objects.create(pub_date=datetime.date.today())
|
|
ArticleTag.objects.create(article=a1, name="foo")
|
|
self.assertEqual(Article.objects.filter(tag__name="foo").count(), 1)
|
|
self.assertEqual(Article.objects.filter(tag__name="bar").count(), 0)
|
|
msg = (
|
|
"Cannot resolve keyword 'tags' into field. Choices are: "
|
|
"active_translation, active_translation_q, articletranslation, "
|
|
"id, idea_things, newsarticle, pub_date, tag"
|
|
)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.filter(tags__name="foo")
|
|
|
|
def test_many_to_many_related_query_name(self):
|
|
a1 = Article.objects.create(pub_date=datetime.date.today())
|
|
i1 = ArticleIdea.objects.create(name="idea1")
|
|
a1.ideas.add(i1)
|
|
self.assertEqual(Article.objects.filter(idea_things__name="idea1").count(), 1)
|
|
self.assertEqual(Article.objects.filter(idea_things__name="idea2").count(), 0)
|
|
msg = (
|
|
"Cannot resolve keyword 'ideas' into field. Choices are: "
|
|
"active_translation, active_translation_q, articletranslation, "
|
|
"id, idea_things, newsarticle, pub_date, tag"
|
|
)
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
Article.objects.filter(ideas__name="idea1")
|
|
|
|
@translation.override("fi")
|
|
def test_inheritance(self):
|
|
na = NewsArticle.objects.create(pub_date=datetime.date.today())
|
|
ArticleTranslation.objects.create(
|
|
article=na, lang="fi", title="foo", body="bar"
|
|
)
|
|
self.assertSequenceEqual(
|
|
NewsArticle.objects.select_related("active_translation"), [na]
|
|
)
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(
|
|
NewsArticle.objects.select_related("active_translation")[
|
|
0
|
|
].active_translation.title,
|
|
"foo",
|
|
)
|
|
|
|
@skipUnlessDBFeature("has_bulk_insert")
|
|
def test_batch_create_foreign_object(self):
|
|
objs = [
|
|
Person(name="abcd_%s" % i, person_country=self.usa) for i in range(0, 5)
|
|
]
|
|
Person.objects.bulk_create(objs, 10)
|
|
|
|
def test_isnull_lookup(self):
|
|
m1 = Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group_id=None
|
|
)
|
|
m2 = Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
self.assertSequenceEqual(
|
|
Membership.objects.filter(group__isnull=True),
|
|
[m1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Membership.objects.filter(group__isnull=False),
|
|
[m2],
|
|
)
|
|
|
|
|
|
class TestModelCheckTests(SimpleTestCase):
|
|
@isolate_apps("foreign_object")
|
|
def test_check_composite_foreign_object(self):
|
|
class Parent(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
|
|
class Meta:
|
|
unique_together = (("a", "b"),)
|
|
|
|
class Child(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
value = models.CharField(max_length=255)
|
|
parent = models.ForeignObject(
|
|
Parent,
|
|
on_delete=models.SET_NULL,
|
|
from_fields=("a", "b"),
|
|
to_fields=("a", "b"),
|
|
related_name="children",
|
|
)
|
|
|
|
self.assertEqual(Child._meta.get_field("parent").check(from_model=Child), [])
|
|
|
|
@isolate_apps("foreign_object")
|
|
def test_check_subset_composite_foreign_object(self):
|
|
class Parent(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
c = models.PositiveIntegerField()
|
|
|
|
class Meta:
|
|
unique_together = (("a", "b"),)
|
|
|
|
class Child(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
c = models.PositiveIntegerField()
|
|
d = models.CharField(max_length=255)
|
|
parent = models.ForeignObject(
|
|
Parent,
|
|
on_delete=models.SET_NULL,
|
|
from_fields=("a", "b", "c"),
|
|
to_fields=("a", "b", "c"),
|
|
related_name="children",
|
|
)
|
|
|
|
self.assertEqual(Child._meta.get_field("parent").check(from_model=Child), [])
|
|
|
|
|
|
class TestExtraJoinFilterQ(TestCase):
|
|
@translation.override("fi")
|
|
def test_extra_join_filter_q(self):
|
|
a = Article.objects.create(pub_date=datetime.datetime.today())
|
|
ArticleTranslation.objects.create(
|
|
article=a, lang="fi", title="title", body="body"
|
|
)
|
|
qs = Article.objects.all()
|
|
with self.assertNumQueries(2):
|
|
self.assertEqual(qs[0].active_translation_q.title, "title")
|
|
qs = qs.select_related("active_translation_q")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(qs[0].active_translation_q.title, "title")
|
|
|
|
|
|
class TestCachedPathInfo(TestCase):
|
|
def test_equality(self):
|
|
"""
|
|
The path_infos and reverse_path_infos attributes are equivalent to
|
|
calling the get_<method>() with no arguments.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
self.assertEqual(
|
|
foreign_object.path_infos,
|
|
foreign_object.get_path_info(),
|
|
)
|
|
self.assertEqual(
|
|
foreign_object.reverse_path_infos,
|
|
foreign_object.get_reverse_path_info(),
|
|
)
|
|
|
|
def test_copy_removes_direct_cached_values(self):
|
|
"""
|
|
Shallow copying a ForeignObject (or a ForeignObjectRel) removes the
|
|
object's direct cached PathInfo values.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
# Trigger storage of cached_property into ForeignObject's __dict__.
|
|
foreign_object.path_infos
|
|
foreign_object.reverse_path_infos
|
|
# The ForeignObjectRel doesn't have reverse_path_infos.
|
|
foreign_object.remote_field.path_infos
|
|
self.assertIn("path_infos", foreign_object.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object.__dict__)
|
|
self.assertIn("path_infos", foreign_object.remote_field.__dict__)
|
|
# Cached value is removed via __getstate__() on ForeignObjectRel
|
|
# because no __copy__() method exists, so __reduce_ex__() is used.
|
|
remote_field_copy = copy.copy(foreign_object.remote_field)
|
|
self.assertNotIn("path_infos", remote_field_copy.__dict__)
|
|
# Cached values are removed via __copy__() on ForeignObject for
|
|
# consistency of behavior.
|
|
foreign_object_copy = copy.copy(foreign_object)
|
|
self.assertNotIn("path_infos", foreign_object_copy.__dict__)
|
|
self.assertNotIn("reverse_path_infos", foreign_object_copy.__dict__)
|
|
# ForeignObjectRel's remains because it's part of a shallow copy.
|
|
self.assertIn("path_infos", foreign_object_copy.remote_field.__dict__)
|
|
|
|
def test_deepcopy_removes_cached_values(self):
|
|
"""
|
|
Deep copying a ForeignObject removes the object's cached PathInfo
|
|
values, including those of the related ForeignObjectRel.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
# Trigger storage of cached_property into ForeignObject's __dict__.
|
|
foreign_object.path_infos
|
|
foreign_object.reverse_path_infos
|
|
# The ForeignObjectRel doesn't have reverse_path_infos.
|
|
foreign_object.remote_field.path_infos
|
|
self.assertIn("path_infos", foreign_object.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object.__dict__)
|
|
self.assertIn("path_infos", foreign_object.remote_field.__dict__)
|
|
# Cached value is removed via __getstate__() on ForeignObjectRel
|
|
# because no __deepcopy__() method exists, so __reduce_ex__() is used.
|
|
remote_field_copy = copy.deepcopy(foreign_object.remote_field)
|
|
self.assertNotIn("path_infos", remote_field_copy.__dict__)
|
|
# Field.__deepcopy__() internally uses __copy__() on both the
|
|
# ForeignObject and ForeignObjectRel, so all cached values are removed.
|
|
foreign_object_copy = copy.deepcopy(foreign_object)
|
|
self.assertNotIn("path_infos", foreign_object_copy.__dict__)
|
|
self.assertNotIn("reverse_path_infos", foreign_object_copy.__dict__)
|
|
self.assertNotIn("path_infos", foreign_object_copy.remote_field.__dict__)
|
|
|
|
def test_pickling_foreignobjectrel(self):
|
|
"""
|
|
Pickling a ForeignObjectRel removes the path_infos attribute.
|
|
|
|
ForeignObjectRel implements __getstate__(), so copy and pickle modules
|
|
both use that, but ForeignObject implements __reduce__() and __copy__()
|
|
separately, so doesn't share the same behaviour.
|
|
"""
|
|
foreign_object_rel = Membership._meta.get_field("person").remote_field
|
|
# Trigger storage of cached_property into ForeignObjectRel's __dict__.
|
|
foreign_object_rel.path_infos
|
|
self.assertIn("path_infos", foreign_object_rel.__dict__)
|
|
foreign_object_rel_restored = pickle.loads(pickle.dumps(foreign_object_rel))
|
|
self.assertNotIn("path_infos", foreign_object_rel_restored.__dict__)
|
|
|
|
def test_pickling_foreignobject(self):
|
|
"""
|
|
Pickling a ForeignObject does not remove the cached PathInfo values.
|
|
|
|
ForeignObject will always keep the path_infos and reverse_path_infos
|
|
attributes within the same process, because of the way
|
|
Field.__reduce__() is used for restoring values.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
# Trigger storage of cached_property into ForeignObjectRel's __dict__
|
|
foreign_object.path_infos
|
|
foreign_object.reverse_path_infos
|
|
self.assertIn("path_infos", foreign_object.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object.__dict__)
|
|
foreign_object_restored = pickle.loads(pickle.dumps(foreign_object))
|
|
self.assertIn("path_infos", foreign_object_restored.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object_restored.__dict__)
|