mirror of
https://github.com/django/django.git
synced 2024-12-28 12:06:22 +00:00
334 lines
13 KiB
Python
334 lines
13 KiB
Python
from operator import attrgetter
|
|
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.contrib.sessions.backends.db import SessionStore
|
|
from django.db import models
|
|
from django.db.models import Count
|
|
from django.test import TestCase, ignore_warnings, override_settings
|
|
from django.utils.deprecation import RemovedInDjango50Warning
|
|
|
|
from .models import (
|
|
Base,
|
|
Child,
|
|
Derived,
|
|
Feature,
|
|
Item,
|
|
ItemAndSimpleItem,
|
|
Leaf,
|
|
Location,
|
|
OneToOneItem,
|
|
Proxy,
|
|
ProxyRelated,
|
|
RelatedItem,
|
|
Request,
|
|
ResolveThis,
|
|
SimpleItem,
|
|
SpecialFeature,
|
|
)
|
|
|
|
|
|
class DeferRegressionTest(TestCase):
|
|
def test_basic(self):
|
|
# Deferred fields should really be deferred and not accidentally use
|
|
# the field's default value just because they aren't passed to __init__
|
|
|
|
Item.objects.create(name="first", value=42)
|
|
obj = Item.objects.only("name", "other_value").get(name="first")
|
|
# Accessing "name" doesn't trigger a new database query. Accessing
|
|
# "value" or "text" should.
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(obj.name, "first")
|
|
self.assertEqual(obj.other_value, 0)
|
|
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(obj.value, 42)
|
|
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(obj.text, "xyzzy")
|
|
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(obj.text, "xyzzy")
|
|
|
|
# Regression test for #10695. Make sure different instances don't
|
|
# inadvertently share data in the deferred descriptor objects.
|
|
i = Item.objects.create(name="no I'm first", value=37)
|
|
items = Item.objects.only("value").order_by("-value")
|
|
self.assertEqual(items[0].name, "first")
|
|
self.assertEqual(items[1].name, "no I'm first")
|
|
|
|
RelatedItem.objects.create(item=i)
|
|
r = RelatedItem.objects.defer("item").get()
|
|
self.assertEqual(r.item_id, i.id)
|
|
self.assertEqual(r.item, i)
|
|
|
|
# Some further checks for select_related() and inherited model
|
|
# behavior (regression for #10710).
|
|
c1 = Child.objects.create(name="c1", value=42)
|
|
c2 = Child.objects.create(name="c2", value=37)
|
|
Leaf.objects.create(name="l1", child=c1, second_child=c2)
|
|
|
|
obj = Leaf.objects.only("name", "child").select_related()[0]
|
|
self.assertEqual(obj.child.name, "c1")
|
|
|
|
self.assertQuerySetEqual(
|
|
Leaf.objects.select_related().only("child__name", "second_child__name"),
|
|
[
|
|
"l1",
|
|
],
|
|
attrgetter("name"),
|
|
)
|
|
|
|
# Models instances with deferred fields should still return the same
|
|
# content types as their non-deferred versions (bug #10738).
|
|
ctype = ContentType.objects.get_for_model
|
|
c1 = ctype(Item.objects.all()[0])
|
|
c2 = ctype(Item.objects.defer("name")[0])
|
|
c3 = ctype(Item.objects.only("name")[0])
|
|
self.assertTrue(c1 is c2 is c3)
|
|
|
|
# Regression for #10733 - only() can be used on a model with two
|
|
# foreign keys.
|
|
results = Leaf.objects.only("name", "child", "second_child").select_related()
|
|
self.assertEqual(results[0].child.name, "c1")
|
|
self.assertEqual(results[0].second_child.name, "c2")
|
|
|
|
results = Leaf.objects.only(
|
|
"name", "child", "second_child", "child__name", "second_child__name"
|
|
).select_related()
|
|
self.assertEqual(results[0].child.name, "c1")
|
|
self.assertEqual(results[0].second_child.name, "c2")
|
|
|
|
# Regression for #16409 - make sure defer() and only() work with annotate()
|
|
self.assertIsInstance(
|
|
list(SimpleItem.objects.annotate(Count("feature")).defer("name")), list
|
|
)
|
|
self.assertIsInstance(
|
|
list(SimpleItem.objects.annotate(Count("feature")).only("name")), list
|
|
)
|
|
|
|
@ignore_warnings(category=RemovedInDjango50Warning)
|
|
@override_settings(
|
|
SESSION_SERIALIZER="django.contrib.sessions.serializers.PickleSerializer"
|
|
)
|
|
def test_ticket_12163(self):
|
|
# Test for #12163 - Pickling error saving session with unsaved model
|
|
# instances.
|
|
SESSION_KEY = "2b1189a188b44ad18c35e1baac6ceead"
|
|
|
|
item = Item()
|
|
item._deferred = False
|
|
s = SessionStore(SESSION_KEY)
|
|
s.clear()
|
|
s["item"] = item
|
|
s.save(must_create=True)
|
|
|
|
s = SessionStore(SESSION_KEY)
|
|
s.modified = True
|
|
s.save()
|
|
|
|
i2 = s["item"]
|
|
self.assertFalse(i2._deferred)
|
|
|
|
def test_ticket_16409(self):
|
|
# Regression for #16409 - make sure defer() and only() work with annotate()
|
|
self.assertIsInstance(
|
|
list(SimpleItem.objects.annotate(Count("feature")).defer("name")), list
|
|
)
|
|
self.assertIsInstance(
|
|
list(SimpleItem.objects.annotate(Count("feature")).only("name")), list
|
|
)
|
|
|
|
def test_ticket_23270(self):
|
|
d = Derived.objects.create(text="foo", other_text="bar")
|
|
with self.assertNumQueries(1):
|
|
obj = Base.objects.select_related("derived").defer("text")[0]
|
|
self.assertIsInstance(obj.derived, Derived)
|
|
self.assertEqual("bar", obj.derived.other_text)
|
|
self.assertNotIn("text", obj.__dict__)
|
|
self.assertEqual(d.pk, obj.derived.base_ptr_id)
|
|
|
|
def test_only_and_defer_usage_on_proxy_models(self):
|
|
# Regression for #15790 - only() broken for proxy models
|
|
proxy = Proxy.objects.create(name="proxy", value=42)
|
|
|
|
msg = "QuerySet.only() return bogus results with proxy models"
|
|
dp = Proxy.objects.only("other_value").get(pk=proxy.pk)
|
|
self.assertEqual(dp.name, proxy.name, msg=msg)
|
|
self.assertEqual(dp.value, proxy.value, msg=msg)
|
|
|
|
# also test things with .defer()
|
|
msg = "QuerySet.defer() return bogus results with proxy models"
|
|
dp = Proxy.objects.defer("name", "text", "value").get(pk=proxy.pk)
|
|
self.assertEqual(dp.name, proxy.name, msg=msg)
|
|
self.assertEqual(dp.value, proxy.value, msg=msg)
|
|
|
|
def test_resolve_columns(self):
|
|
ResolveThis.objects.create(num=5.0, name="Foobar")
|
|
qs = ResolveThis.objects.defer("num")
|
|
self.assertEqual(1, qs.count())
|
|
self.assertEqual("Foobar", qs[0].name)
|
|
|
|
def test_reverse_one_to_one_relations(self):
|
|
# Refs #14694. Test reverse relations which are known unique (reverse
|
|
# side has o2ofield or unique FK) - the o2o case
|
|
item = Item.objects.create(name="first", value=42)
|
|
o2o = OneToOneItem.objects.create(item=item, name="second")
|
|
self.assertEqual(len(Item.objects.defer("one_to_one_item__name")), 1)
|
|
self.assertEqual(len(Item.objects.select_related("one_to_one_item")), 1)
|
|
self.assertEqual(
|
|
len(
|
|
Item.objects.select_related("one_to_one_item").defer(
|
|
"one_to_one_item__name"
|
|
)
|
|
),
|
|
1,
|
|
)
|
|
self.assertEqual(
|
|
len(Item.objects.select_related("one_to_one_item").defer("value")), 1
|
|
)
|
|
# Make sure that `only()` doesn't break when we pass in a unique relation,
|
|
# rather than a field on the relation.
|
|
self.assertEqual(len(Item.objects.only("one_to_one_item")), 1)
|
|
with self.assertNumQueries(1):
|
|
i = Item.objects.select_related("one_to_one_item")[0]
|
|
self.assertEqual(i.one_to_one_item.pk, o2o.pk)
|
|
self.assertEqual(i.one_to_one_item.name, "second")
|
|
with self.assertNumQueries(1):
|
|
i = Item.objects.select_related("one_to_one_item").defer(
|
|
"value", "one_to_one_item__name"
|
|
)[0]
|
|
self.assertEqual(i.one_to_one_item.pk, o2o.pk)
|
|
self.assertEqual(i.name, "first")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(i.one_to_one_item.name, "second")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(i.value, 42)
|
|
|
|
def test_defer_with_select_related(self):
|
|
item1 = Item.objects.create(name="first", value=47)
|
|
item2 = Item.objects.create(name="second", value=42)
|
|
simple = SimpleItem.objects.create(name="simple", value="23")
|
|
ItemAndSimpleItem.objects.create(item=item1, simple=simple)
|
|
|
|
obj = ItemAndSimpleItem.objects.defer("item").select_related("simple").get()
|
|
self.assertEqual(obj.item, item1)
|
|
self.assertEqual(obj.item_id, item1.id)
|
|
|
|
obj.item = item2
|
|
obj.save()
|
|
|
|
obj = ItemAndSimpleItem.objects.defer("item").select_related("simple").get()
|
|
self.assertEqual(obj.item, item2)
|
|
self.assertEqual(obj.item_id, item2.id)
|
|
|
|
def test_proxy_model_defer_with_select_related(self):
|
|
# Regression for #22050
|
|
item = Item.objects.create(name="first", value=47)
|
|
RelatedItem.objects.create(item=item)
|
|
# Defer fields with only()
|
|
obj = ProxyRelated.objects.select_related().only("item__name")[0]
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(obj.item.name, "first")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(obj.item.value, 47)
|
|
|
|
def test_only_with_select_related(self):
|
|
# Test for #17485.
|
|
item = SimpleItem.objects.create(name="first", value=47)
|
|
feature = Feature.objects.create(item=item)
|
|
SpecialFeature.objects.create(feature=feature)
|
|
|
|
qs = Feature.objects.only("item__name").select_related("item")
|
|
self.assertEqual(len(qs), 1)
|
|
|
|
qs = SpecialFeature.objects.only("feature__item__name").select_related(
|
|
"feature__item"
|
|
)
|
|
self.assertEqual(len(qs), 1)
|
|
|
|
def test_defer_annotate_select_related(self):
|
|
location = Location.objects.create()
|
|
Request.objects.create(location=location)
|
|
self.assertIsInstance(
|
|
list(
|
|
Request.objects.annotate(Count("items"))
|
|
.select_related("profile", "location")
|
|
.only("profile", "location")
|
|
),
|
|
list,
|
|
)
|
|
self.assertIsInstance(
|
|
list(
|
|
Request.objects.annotate(Count("items"))
|
|
.select_related("profile", "location")
|
|
.only("profile__profile1", "location__location1")
|
|
),
|
|
list,
|
|
)
|
|
self.assertIsInstance(
|
|
list(
|
|
Request.objects.annotate(Count("items"))
|
|
.select_related("profile", "location")
|
|
.defer("request1", "request2", "request3", "request4")
|
|
),
|
|
list,
|
|
)
|
|
|
|
def test_common_model_different_mask(self):
|
|
child = Child.objects.create(name="Child", value=42)
|
|
second_child = Child.objects.create(name="Second", value=64)
|
|
Leaf.objects.create(child=child, second_child=second_child)
|
|
with self.assertNumQueries(1):
|
|
leaf = (
|
|
Leaf.objects.select_related("child", "second_child")
|
|
.defer("child__name", "second_child__value")
|
|
.get()
|
|
)
|
|
self.assertEqual(leaf.child, child)
|
|
self.assertEqual(leaf.second_child, second_child)
|
|
self.assertEqual(leaf.child.get_deferred_fields(), {"name"})
|
|
self.assertEqual(leaf.second_child.get_deferred_fields(), {"value"})
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(leaf.child.value, 42)
|
|
self.assertEqual(leaf.second_child.name, "Second")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(leaf.child.name, "Child")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(leaf.second_child.value, 64)
|
|
|
|
|
|
class DeferDeletionSignalsTests(TestCase):
|
|
senders = [Item, Proxy]
|
|
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.item_pk = Item.objects.create(value=1).pk
|
|
|
|
def setUp(self):
|
|
self.pre_delete_senders = []
|
|
self.post_delete_senders = []
|
|
for sender in self.senders:
|
|
models.signals.pre_delete.connect(self.pre_delete_receiver, sender)
|
|
models.signals.post_delete.connect(self.post_delete_receiver, sender)
|
|
|
|
def tearDown(self):
|
|
for sender in self.senders:
|
|
models.signals.pre_delete.disconnect(self.pre_delete_receiver, sender)
|
|
models.signals.post_delete.disconnect(self.post_delete_receiver, sender)
|
|
|
|
def pre_delete_receiver(self, sender, **kwargs):
|
|
self.pre_delete_senders.append(sender)
|
|
|
|
def post_delete_receiver(self, sender, **kwargs):
|
|
self.post_delete_senders.append(sender)
|
|
|
|
def test_delete_defered_model(self):
|
|
Item.objects.only("value").get(pk=self.item_pk).delete()
|
|
self.assertEqual(self.pre_delete_senders, [Item])
|
|
self.assertEqual(self.post_delete_senders, [Item])
|
|
|
|
def test_delete_defered_proxy_model(self):
|
|
Proxy.objects.only("value").get(pk=self.item_pk).delete()
|
|
self.assertEqual(self.pre_delete_senders, [Proxy])
|
|
self.assertEqual(self.post_delete_senders, [Proxy])
|