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299 lines
12 KiB
Python
299 lines
12 KiB
Python
from django.core.exceptions import FieldError
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from django.db.models import FilteredRelation
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from django.test import SimpleTestCase, TestCase
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from .models import (
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AdvancedUserStat,
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Child1,
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Child2,
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Child3,
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Child4,
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Image,
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LinkedList,
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Parent1,
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Parent2,
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Product,
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StatDetails,
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User,
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UserProfile,
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UserStat,
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UserStatResult,
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)
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class ReverseSelectRelatedTestCase(TestCase):
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@classmethod
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def setUpTestData(cls):
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user = User.objects.create(username="test")
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UserProfile.objects.create(user=user, state="KS", city="Lawrence")
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results = UserStatResult.objects.create(results="first results")
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userstat = UserStat.objects.create(user=user, posts=150, results=results)
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StatDetails.objects.create(base_stats=userstat, comments=259)
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user2 = User.objects.create(username="bob")
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results2 = UserStatResult.objects.create(results="moar results")
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advstat = AdvancedUserStat.objects.create(
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user=user2, posts=200, karma=5, results=results2
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)
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StatDetails.objects.create(base_stats=advstat, comments=250)
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p1 = Parent1(name1="Only Parent1")
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p1.save()
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c1 = Child1(name1="Child1 Parent1", name2="Child1 Parent2", value=1)
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c1.save()
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p2 = Parent2(name2="Child2 Parent2")
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p2.save()
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c2 = Child2(name1="Child2 Parent1", parent2=p2, value=2)
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c2.save()
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def test_basic(self):
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with self.assertNumQueries(1):
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u = User.objects.select_related("userprofile").get(username="test")
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self.assertEqual(u.userprofile.state, "KS")
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def test_follow_next_level(self):
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with self.assertNumQueries(1):
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u = User.objects.select_related("userstat__results").get(username="test")
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self.assertEqual(u.userstat.posts, 150)
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self.assertEqual(u.userstat.results.results, "first results")
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def test_follow_two(self):
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with self.assertNumQueries(1):
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u = User.objects.select_related("userprofile", "userstat").get(
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username="test"
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)
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self.assertEqual(u.userprofile.state, "KS")
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self.assertEqual(u.userstat.posts, 150)
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def test_follow_two_next_level(self):
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with self.assertNumQueries(1):
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u = User.objects.select_related(
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"userstat__results", "userstat__statdetails"
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).get(username="test")
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self.assertEqual(u.userstat.results.results, "first results")
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self.assertEqual(u.userstat.statdetails.comments, 259)
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def test_forward_and_back(self):
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with self.assertNumQueries(1):
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stat = UserStat.objects.select_related("user__userprofile").get(
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user__username="test"
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)
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self.assertEqual(stat.user.userprofile.state, "KS")
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self.assertEqual(stat.user.userstat.posts, 150)
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def test_back_and_forward(self):
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with self.assertNumQueries(1):
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u = User.objects.select_related("userstat").get(username="test")
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self.assertEqual(u.userstat.user.username, "test")
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def test_not_followed_by_default(self):
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with self.assertNumQueries(2):
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u = User.objects.select_related().get(username="test")
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self.assertEqual(u.userstat.posts, 150)
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def test_follow_from_child_class(self):
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with self.assertNumQueries(1):
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stat = AdvancedUserStat.objects.select_related("user", "statdetails").get(
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posts=200
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)
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self.assertEqual(stat.statdetails.comments, 250)
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self.assertEqual(stat.user.username, "bob")
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def test_follow_inheritance(self):
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with self.assertNumQueries(1):
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stat = UserStat.objects.select_related("user", "advanceduserstat").get(
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posts=200
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)
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self.assertEqual(stat.advanceduserstat.posts, 200)
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self.assertEqual(stat.user.username, "bob")
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with self.assertNumQueries(0):
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self.assertEqual(stat.advanceduserstat.user.username, "bob")
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def test_nullable_relation(self):
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im = Image.objects.create(name="imag1")
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p1 = Product.objects.create(name="Django Plushie", image=im)
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p2 = Product.objects.create(name="Talking Django Plushie")
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with self.assertNumQueries(1):
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result = sorted(
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Product.objects.select_related("image"), key=lambda x: x.name
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)
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self.assertEqual(
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[p.name for p in result], ["Django Plushie", "Talking Django Plushie"]
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)
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self.assertEqual(p1.image, im)
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# Check for ticket #13839
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self.assertIsNone(p2.image)
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def test_missing_reverse(self):
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"""
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Ticket #13839: select_related() should NOT cache None
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for missing objects on a reverse 1-1 relation.
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"""
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with self.assertNumQueries(1):
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user = User.objects.select_related("userprofile").get(username="bob")
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with self.assertRaises(UserProfile.DoesNotExist):
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user.userprofile
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def test_nullable_missing_reverse(self):
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"""
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Ticket #13839: select_related() should NOT cache None
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for missing objects on a reverse 0-1 relation.
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"""
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Image.objects.create(name="imag1")
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with self.assertNumQueries(1):
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image = Image.objects.select_related("product").get()
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with self.assertRaises(Product.DoesNotExist):
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image.product
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def test_parent_only(self):
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with self.assertNumQueries(1):
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p = Parent1.objects.select_related("child1").get(name1="Only Parent1")
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with self.assertNumQueries(0):
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with self.assertRaises(Child1.DoesNotExist):
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p.child1
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def test_multiple_subclass(self):
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with self.assertNumQueries(1):
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p = Parent1.objects.select_related("child1").get(name1="Child1 Parent1")
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self.assertEqual(p.child1.name2, "Child1 Parent2")
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def test_onetoone_with_subclass(self):
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with self.assertNumQueries(1):
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p = Parent2.objects.select_related("child2").get(name2="Child2 Parent2")
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self.assertEqual(p.child2.name1, "Child2 Parent1")
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def test_onetoone_with_two_subclasses(self):
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with self.assertNumQueries(1):
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p = Parent2.objects.select_related("child2", "child2__child3").get(
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name2="Child2 Parent2"
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)
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self.assertEqual(p.child2.name1, "Child2 Parent1")
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with self.assertRaises(Child3.DoesNotExist):
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p.child2.child3
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p3 = Parent2(name2="Child3 Parent2")
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p3.save()
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c2 = Child3(name1="Child3 Parent1", parent2=p3, value=2, value3=3)
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c2.save()
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with self.assertNumQueries(1):
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p = Parent2.objects.select_related("child2", "child2__child3").get(
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name2="Child3 Parent2"
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)
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self.assertEqual(p.child2.name1, "Child3 Parent1")
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self.assertEqual(p.child2.child3.value3, 3)
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self.assertEqual(p.child2.child3.value, p.child2.value)
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self.assertEqual(p.child2.name1, p.child2.child3.name1)
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def test_multiinheritance_two_subclasses(self):
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with self.assertNumQueries(1):
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p = Parent1.objects.select_related("child1", "child1__child4").get(
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name1="Child1 Parent1"
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)
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self.assertEqual(p.child1.name2, "Child1 Parent2")
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self.assertEqual(p.child1.name1, p.name1)
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with self.assertRaises(Child4.DoesNotExist):
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p.child1.child4
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Child4(name1="n1", name2="n2", value=1, value4=4).save()
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with self.assertNumQueries(1):
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p = Parent2.objects.select_related("child1", "child1__child4").get(
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name2="n2"
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)
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self.assertEqual(p.name2, "n2")
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self.assertEqual(p.child1.name1, "n1")
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self.assertEqual(p.child1.name2, p.name2)
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self.assertEqual(p.child1.value, 1)
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self.assertEqual(p.child1.child4.name1, p.child1.name1)
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self.assertEqual(p.child1.child4.name2, p.child1.name2)
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self.assertEqual(p.child1.child4.value, p.child1.value)
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self.assertEqual(p.child1.child4.value4, 4)
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def test_inheritance_deferred(self):
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c = Child4.objects.create(name1="n1", name2="n2", value=1, value4=4)
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with self.assertNumQueries(1):
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p = (
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Parent2.objects.select_related("child1")
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.only("id2", "child1__value")
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.get(name2="n2")
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)
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self.assertEqual(p.id2, c.id2)
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self.assertEqual(p.child1.value, 1)
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p = (
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Parent2.objects.select_related("child1")
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.only("id2", "child1__value")
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.get(name2="n2")
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)
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with self.assertNumQueries(1):
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self.assertEqual(p.name2, "n2")
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p = (
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Parent2.objects.select_related("child1")
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.only("id2", "child1__value")
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.get(name2="n2")
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)
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with self.assertNumQueries(1):
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self.assertEqual(p.child1.name2, "n2")
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def test_inheritance_deferred2(self):
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c = Child4.objects.create(name1="n1", name2="n2", value=1, value4=4)
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qs = Parent2.objects.select_related("child1", "child1__child4").only(
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"id2", "child1__value", "child1__child4__value4"
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)
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with self.assertNumQueries(1):
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p = qs.get(name2="n2")
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self.assertEqual(p.id2, c.id2)
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self.assertEqual(p.child1.value, 1)
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self.assertEqual(p.child1.child4.value4, 4)
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self.assertEqual(p.child1.child4.id2, c.id2)
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p = qs.get(name2="n2")
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with self.assertNumQueries(1):
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self.assertEqual(p.child1.name2, "n2")
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p = qs.get(name2="n2")
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with self.assertNumQueries(0):
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self.assertEqual(p.child1.name1, "n1")
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self.assertEqual(p.child1.child4.name1, "n1")
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def test_self_relation(self):
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item1 = LinkedList.objects.create(name="item1")
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LinkedList.objects.create(name="item2", previous_item=item1)
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with self.assertNumQueries(1):
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item1_db = LinkedList.objects.select_related("next_item").get(name="item1")
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self.assertEqual(item1_db.next_item.name, "item2")
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class ReverseSelectRelatedValidationTests(SimpleTestCase):
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"""
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Rverse related fields should be listed in the validation message when an
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invalid field is given in select_related().
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"""
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non_relational_error = (
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"Non-relational field given in select_related: '%s'. Choices are: %s"
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)
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invalid_error = (
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"Invalid field name(s) given in select_related: '%s'. Choices are: %s"
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)
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def test_reverse_related_validation(self):
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fields = "userprofile, userstat"
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with self.assertRaisesMessage(
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FieldError, self.invalid_error % ("foobar", fields)
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):
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list(User.objects.select_related("foobar"))
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with self.assertRaisesMessage(
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FieldError, self.non_relational_error % ("username", fields)
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):
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list(User.objects.select_related("username"))
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def test_reverse_related_validation_with_filtered_relation(self):
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fields = "userprofile, userstat, relation"
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with self.assertRaisesMessage(
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FieldError, self.invalid_error % ("foobar", fields)
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):
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list(
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User.objects.annotate(
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relation=FilteredRelation("userprofile")
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).select_related("foobar")
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)
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