mirror of
https://github.com/django/django.git
synced 2024-11-22 03:18:31 +01:00
2cf76f2d5d
Regression in b3db6c8dcb.
Thanks Ian Cubitt for the report.
This also corrected test_inheritance_deferred2() test which was
previously properly defined and marked as an expected failure but was
then wrongly adjusted to mask the lack of support for per-alias
deferral that was fixed by #21204.
302 lines
12 KiB
Python
302 lines
12 KiB
Python
from django.core.exceptions import FieldError
|
|
from django.db.models import FilteredRelation
|
|
from django.test import SimpleTestCase, TestCase
|
|
|
|
from .models import (
|
|
AdvancedUserStat,
|
|
Child1,
|
|
Child2,
|
|
Child3,
|
|
Child4,
|
|
Image,
|
|
LinkedList,
|
|
Parent1,
|
|
Parent2,
|
|
Product,
|
|
StatDetails,
|
|
User,
|
|
UserProfile,
|
|
UserStat,
|
|
UserStatResult,
|
|
)
|
|
|
|
|
|
class ReverseSelectRelatedTestCase(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
user = User.objects.create(username="test")
|
|
UserProfile.objects.create(user=user, state="KS", city="Lawrence")
|
|
results = UserStatResult.objects.create(results="first results")
|
|
userstat = UserStat.objects.create(user=user, posts=150, results=results)
|
|
StatDetails.objects.create(base_stats=userstat, comments=259)
|
|
|
|
user2 = User.objects.create(username="bob")
|
|
results2 = UserStatResult.objects.create(results="moar results")
|
|
advstat = AdvancedUserStat.objects.create(
|
|
user=user2, posts=200, karma=5, results=results2
|
|
)
|
|
StatDetails.objects.create(base_stats=advstat, comments=250)
|
|
p1 = Parent1(name1="Only Parent1")
|
|
p1.save()
|
|
c1 = Child1(name1="Child1 Parent1", name2="Child1 Parent2", value=1)
|
|
c1.save()
|
|
p2 = Parent2(name2="Child2 Parent2")
|
|
p2.save()
|
|
c2 = Child2(name1="Child2 Parent1", parent2=p2, value=2)
|
|
c2.save()
|
|
|
|
def test_basic(self):
|
|
with self.assertNumQueries(1):
|
|
u = User.objects.select_related("userprofile").get(username="test")
|
|
self.assertEqual(u.userprofile.state, "KS")
|
|
|
|
def test_follow_next_level(self):
|
|
with self.assertNumQueries(1):
|
|
u = User.objects.select_related("userstat__results").get(username="test")
|
|
self.assertEqual(u.userstat.posts, 150)
|
|
self.assertEqual(u.userstat.results.results, "first results")
|
|
|
|
def test_follow_two(self):
|
|
with self.assertNumQueries(1):
|
|
u = User.objects.select_related("userprofile", "userstat").get(
|
|
username="test"
|
|
)
|
|
self.assertEqual(u.userprofile.state, "KS")
|
|
self.assertEqual(u.userstat.posts, 150)
|
|
|
|
def test_follow_two_next_level(self):
|
|
with self.assertNumQueries(1):
|
|
u = User.objects.select_related(
|
|
"userstat__results", "userstat__statdetails"
|
|
).get(username="test")
|
|
self.assertEqual(u.userstat.results.results, "first results")
|
|
self.assertEqual(u.userstat.statdetails.comments, 259)
|
|
|
|
def test_forward_and_back(self):
|
|
with self.assertNumQueries(1):
|
|
stat = UserStat.objects.select_related("user__userprofile").get(
|
|
user__username="test"
|
|
)
|
|
self.assertEqual(stat.user.userprofile.state, "KS")
|
|
self.assertEqual(stat.user.userstat.posts, 150)
|
|
|
|
def test_back_and_forward(self):
|
|
with self.assertNumQueries(1):
|
|
u = User.objects.select_related("userstat").get(username="test")
|
|
self.assertEqual(u.userstat.user.username, "test")
|
|
|
|
def test_not_followed_by_default(self):
|
|
with self.assertNumQueries(2):
|
|
u = User.objects.select_related().get(username="test")
|
|
self.assertEqual(u.userstat.posts, 150)
|
|
|
|
def test_follow_from_child_class(self):
|
|
with self.assertNumQueries(1):
|
|
stat = AdvancedUserStat.objects.select_related("user", "statdetails").get(
|
|
posts=200
|
|
)
|
|
self.assertEqual(stat.statdetails.comments, 250)
|
|
self.assertEqual(stat.user.username, "bob")
|
|
|
|
def test_follow_inheritance(self):
|
|
with self.assertNumQueries(1):
|
|
stat = UserStat.objects.select_related("user", "advanceduserstat").get(
|
|
posts=200
|
|
)
|
|
self.assertEqual(stat.advanceduserstat.posts, 200)
|
|
self.assertEqual(stat.user.username, "bob")
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(stat.advanceduserstat.user.username, "bob")
|
|
|
|
def test_nullable_relation(self):
|
|
im = Image.objects.create(name="imag1")
|
|
p1 = Product.objects.create(name="Django Plushie", image=im)
|
|
p2 = Product.objects.create(name="Talking Django Plushie")
|
|
|
|
with self.assertNumQueries(1):
|
|
result = sorted(
|
|
Product.objects.select_related("image"), key=lambda x: x.name
|
|
)
|
|
self.assertEqual(
|
|
[p.name for p in result], ["Django Plushie", "Talking Django Plushie"]
|
|
)
|
|
|
|
self.assertEqual(p1.image, im)
|
|
# Check for ticket #13839
|
|
self.assertIsNone(p2.image)
|
|
|
|
def test_missing_reverse(self):
|
|
"""
|
|
Ticket #13839: select_related() should NOT cache None
|
|
for missing objects on a reverse 1-1 relation.
|
|
"""
|
|
with self.assertNumQueries(1):
|
|
user = User.objects.select_related("userprofile").get(username="bob")
|
|
with self.assertRaises(UserProfile.DoesNotExist):
|
|
user.userprofile
|
|
|
|
def test_nullable_missing_reverse(self):
|
|
"""
|
|
Ticket #13839: select_related() should NOT cache None
|
|
for missing objects on a reverse 0-1 relation.
|
|
"""
|
|
Image.objects.create(name="imag1")
|
|
|
|
with self.assertNumQueries(1):
|
|
image = Image.objects.select_related("product").get()
|
|
with self.assertRaises(Product.DoesNotExist):
|
|
image.product
|
|
|
|
def test_parent_only(self):
|
|
with self.assertNumQueries(1):
|
|
p = Parent1.objects.select_related("child1").get(name1="Only Parent1")
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(Child1.DoesNotExist):
|
|
p.child1
|
|
|
|
def test_multiple_subclass(self):
|
|
with self.assertNumQueries(1):
|
|
p = Parent1.objects.select_related("child1").get(name1="Child1 Parent1")
|
|
self.assertEqual(p.child1.name2, "Child1 Parent2")
|
|
|
|
def test_onetoone_with_subclass(self):
|
|
with self.assertNumQueries(1):
|
|
p = Parent2.objects.select_related("child2").get(name2="Child2 Parent2")
|
|
self.assertEqual(p.child2.name1, "Child2 Parent1")
|
|
|
|
def test_onetoone_with_two_subclasses(self):
|
|
with self.assertNumQueries(1):
|
|
p = Parent2.objects.select_related("child2", "child2__child3").get(
|
|
name2="Child2 Parent2"
|
|
)
|
|
self.assertEqual(p.child2.name1, "Child2 Parent1")
|
|
with self.assertRaises(Child3.DoesNotExist):
|
|
p.child2.child3
|
|
p3 = Parent2(name2="Child3 Parent2")
|
|
p3.save()
|
|
c2 = Child3(name1="Child3 Parent1", parent2=p3, value=2, value3=3)
|
|
c2.save()
|
|
with self.assertNumQueries(1):
|
|
p = Parent2.objects.select_related("child2", "child2__child3").get(
|
|
name2="Child3 Parent2"
|
|
)
|
|
self.assertEqual(p.child2.name1, "Child3 Parent1")
|
|
self.assertEqual(p.child2.child3.value3, 3)
|
|
self.assertEqual(p.child2.child3.value, p.child2.value)
|
|
self.assertEqual(p.child2.name1, p.child2.child3.name1)
|
|
|
|
def test_multiinheritance_two_subclasses(self):
|
|
with self.assertNumQueries(1):
|
|
p = Parent1.objects.select_related("child1", "child1__child4").get(
|
|
name1="Child1 Parent1"
|
|
)
|
|
self.assertEqual(p.child1.name2, "Child1 Parent2")
|
|
self.assertEqual(p.child1.name1, p.name1)
|
|
with self.assertRaises(Child4.DoesNotExist):
|
|
p.child1.child4
|
|
Child4(name1="n1", name2="n2", value=1, value4=4).save()
|
|
with self.assertNumQueries(1):
|
|
p = Parent2.objects.select_related("child1", "child1__child4").get(
|
|
name2="n2"
|
|
)
|
|
self.assertEqual(p.name2, "n2")
|
|
self.assertEqual(p.child1.name1, "n1")
|
|
self.assertEqual(p.child1.name2, p.name2)
|
|
self.assertEqual(p.child1.value, 1)
|
|
self.assertEqual(p.child1.child4.name1, p.child1.name1)
|
|
self.assertEqual(p.child1.child4.name2, p.child1.name2)
|
|
self.assertEqual(p.child1.child4.value, p.child1.value)
|
|
self.assertEqual(p.child1.child4.value4, 4)
|
|
|
|
def test_inheritance_deferred(self):
|
|
c = Child4.objects.create(name1="n1", name2="n2", value=1, value4=4)
|
|
with self.assertNumQueries(1):
|
|
p = (
|
|
Parent2.objects.select_related("child1")
|
|
.only("id2", "child1__value")
|
|
.get(name2="n2")
|
|
)
|
|
self.assertEqual(p.id2, c.id2)
|
|
self.assertEqual(p.child1.value, 1)
|
|
p = (
|
|
Parent2.objects.select_related("child1")
|
|
.only("id2", "child1__value")
|
|
.get(name2="n2")
|
|
)
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(p.name2, "n2")
|
|
p = (
|
|
Parent2.objects.select_related("child1")
|
|
.only("id2", "child1__value")
|
|
.get(name2="n2")
|
|
)
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(p.child1.name2, "n2")
|
|
|
|
def test_inheritance_deferred2(self):
|
|
c = Child4.objects.create(name1="n1", name2="n2", value=1, value4=4)
|
|
qs = Parent2.objects.select_related("child1", "child1__child4").only(
|
|
"id2", "child1__value", "child1__child4__value4"
|
|
)
|
|
with self.assertNumQueries(1):
|
|
p = qs.get(name2="n2")
|
|
self.assertEqual(p.id2, c.id2)
|
|
self.assertEqual(p.child1.value, 1)
|
|
self.assertEqual(p.child1.child4.value4, 4)
|
|
self.assertEqual(p.child1.child4.id2, c.id2)
|
|
p = qs.get(name2="n2")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(p.child1.name2, "n2")
|
|
p = qs.get(name2="n2")
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(p.child1.value, 1)
|
|
self.assertEqual(p.child1.child4.value4, 4)
|
|
with self.assertNumQueries(2):
|
|
self.assertEqual(p.child1.name1, "n1")
|
|
self.assertEqual(p.child1.child4.name1, "n1")
|
|
|
|
def test_self_relation(self):
|
|
item1 = LinkedList.objects.create(name="item1")
|
|
LinkedList.objects.create(name="item2", previous_item=item1)
|
|
with self.assertNumQueries(1):
|
|
item1_db = LinkedList.objects.select_related("next_item").get(name="item1")
|
|
self.assertEqual(item1_db.next_item.name, "item2")
|
|
|
|
|
|
class ReverseSelectRelatedValidationTests(SimpleTestCase):
|
|
"""
|
|
Rverse related fields should be listed in the validation message when an
|
|
invalid field is given in select_related().
|
|
"""
|
|
|
|
non_relational_error = (
|
|
"Non-relational field given in select_related: '%s'. Choices are: %s"
|
|
)
|
|
invalid_error = (
|
|
"Invalid field name(s) given in select_related: '%s'. Choices are: %s"
|
|
)
|
|
|
|
def test_reverse_related_validation(self):
|
|
fields = "userprofile, userstat"
|
|
|
|
with self.assertRaisesMessage(
|
|
FieldError, self.invalid_error % ("foobar", fields)
|
|
):
|
|
list(User.objects.select_related("foobar"))
|
|
|
|
with self.assertRaisesMessage(
|
|
FieldError, self.non_relational_error % ("username", fields)
|
|
):
|
|
list(User.objects.select_related("username"))
|
|
|
|
def test_reverse_related_validation_with_filtered_relation(self):
|
|
fields = "userprofile, userstat, relation"
|
|
with self.assertRaisesMessage(
|
|
FieldError, self.invalid_error % ("foobar", fields)
|
|
):
|
|
list(
|
|
User.objects.annotate(
|
|
relation=FilteredRelation("userprofile")
|
|
).select_related("foobar")
|
|
)
|