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539 lines
22 KiB
Python
539 lines
22 KiB
Python
import operator
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from django.db import DatabaseError, NotSupportedError, connection
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from django.db.models import Exists, F, IntegerField, OuterRef, Subquery, Value
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from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature
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from django.test.utils import CaptureQueriesContext
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from .models import Author, Celebrity, ExtraInfo, Number, ReservedName
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@skipUnlessDBFeature("supports_select_union")
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class QuerySetSetOperationTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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Number.objects.bulk_create(Number(num=i, other_num=10 - i) for i in range(10))
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def assertNumbersEqual(self, queryset, expected_numbers, ordered=True):
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self.assertQuerysetEqual(
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queryset, expected_numbers, operator.attrgetter("num"), ordered
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)
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def test_simple_union(self):
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qs1 = Number.objects.filter(num__lte=1)
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qs2 = Number.objects.filter(num__gte=8)
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qs3 = Number.objects.filter(num=5)
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self.assertNumbersEqual(qs1.union(qs2, qs3), [0, 1, 5, 8, 9], ordered=False)
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@skipUnlessDBFeature("supports_select_intersection")
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def test_simple_intersection(self):
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qs1 = Number.objects.filter(num__lte=5)
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qs2 = Number.objects.filter(num__gte=5)
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qs3 = Number.objects.filter(num__gte=4, num__lte=6)
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self.assertNumbersEqual(qs1.intersection(qs2, qs3), [5], ordered=False)
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@skipUnlessDBFeature("supports_select_intersection")
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def test_intersection_with_values(self):
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ReservedName.objects.create(name="a", order=2)
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qs1 = ReservedName.objects.all()
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reserved_name = qs1.intersection(qs1).values("name", "order", "id").get()
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self.assertEqual(reserved_name["name"], "a")
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self.assertEqual(reserved_name["order"], 2)
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reserved_name = qs1.intersection(qs1).values_list("name", "order", "id").get()
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self.assertEqual(reserved_name[:2], ("a", 2))
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@skipUnlessDBFeature("supports_select_difference")
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def test_simple_difference(self):
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qs1 = Number.objects.filter(num__lte=5)
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qs2 = Number.objects.filter(num__lte=4)
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self.assertNumbersEqual(qs1.difference(qs2), [5], ordered=False)
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def test_union_distinct(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.all()
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self.assertEqual(len(list(qs1.union(qs2, all=True))), 20)
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self.assertEqual(len(list(qs1.union(qs2))), 10)
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def test_union_none(self):
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qs1 = Number.objects.filter(num__lte=1)
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qs2 = Number.objects.filter(num__gte=8)
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qs3 = qs1.union(qs2)
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self.assertSequenceEqual(qs3.none(), [])
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self.assertNumbersEqual(qs3, [0, 1, 8, 9], ordered=False)
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@skipUnlessDBFeature("supports_select_intersection")
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def test_intersection_with_empty_qs(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.none()
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qs3 = Number.objects.filter(pk__in=[])
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self.assertEqual(len(qs1.intersection(qs2)), 0)
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self.assertEqual(len(qs1.intersection(qs3)), 0)
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self.assertEqual(len(qs2.intersection(qs1)), 0)
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self.assertEqual(len(qs3.intersection(qs1)), 0)
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self.assertEqual(len(qs2.intersection(qs2)), 0)
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self.assertEqual(len(qs3.intersection(qs3)), 0)
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@skipUnlessDBFeature("supports_select_difference")
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def test_difference_with_empty_qs(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.none()
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qs3 = Number.objects.filter(pk__in=[])
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self.assertEqual(len(qs1.difference(qs2)), 10)
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self.assertEqual(len(qs1.difference(qs3)), 10)
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self.assertEqual(len(qs2.difference(qs1)), 0)
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self.assertEqual(len(qs3.difference(qs1)), 0)
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self.assertEqual(len(qs2.difference(qs2)), 0)
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self.assertEqual(len(qs3.difference(qs3)), 0)
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@skipUnlessDBFeature("supports_select_difference")
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def test_difference_with_values(self):
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ReservedName.objects.create(name="a", order=2)
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qs1 = ReservedName.objects.all()
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qs2 = ReservedName.objects.none()
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reserved_name = qs1.difference(qs2).values("name", "order", "id").get()
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self.assertEqual(reserved_name["name"], "a")
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self.assertEqual(reserved_name["order"], 2)
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reserved_name = qs1.difference(qs2).values_list("name", "order", "id").get()
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self.assertEqual(reserved_name[:2], ("a", 2))
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def test_union_with_empty_qs(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.none()
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qs3 = Number.objects.filter(pk__in=[])
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self.assertEqual(len(qs1.union(qs2)), 10)
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self.assertEqual(len(qs2.union(qs1)), 10)
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self.assertEqual(len(qs1.union(qs3)), 10)
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self.assertEqual(len(qs3.union(qs1)), 10)
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self.assertEqual(len(qs2.union(qs1, qs1, qs1)), 10)
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self.assertEqual(len(qs2.union(qs1, qs1, all=True)), 20)
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self.assertEqual(len(qs2.union(qs2)), 0)
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self.assertEqual(len(qs3.union(qs3)), 0)
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def test_empty_qs_union_with_ordered_qs(self):
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qs1 = Number.objects.order_by("num")
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qs2 = Number.objects.none().union(qs1).order_by("num")
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self.assertEqual(list(qs1), list(qs2))
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def test_limits(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.all()
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self.assertEqual(len(list(qs1.union(qs2)[:2])), 2)
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def test_ordering(self):
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qs1 = Number.objects.filter(num__lte=1)
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qs2 = Number.objects.filter(num__gte=2, num__lte=3)
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self.assertNumbersEqual(qs1.union(qs2).order_by("-num"), [3, 2, 1, 0])
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def test_ordering_by_alias(self):
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qs1 = Number.objects.filter(num__lte=1).values(alias=F("num"))
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qs2 = Number.objects.filter(num__gte=2, num__lte=3).values(alias=F("num"))
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self.assertQuerysetEqual(
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qs1.union(qs2).order_by("-alias"),
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[3, 2, 1, 0],
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operator.itemgetter("alias"),
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)
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def test_ordering_by_f_expression(self):
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qs1 = Number.objects.filter(num__lte=1)
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qs2 = Number.objects.filter(num__gte=2, num__lte=3)
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self.assertNumbersEqual(qs1.union(qs2).order_by(F("num").desc()), [3, 2, 1, 0])
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def test_ordering_by_f_expression_and_alias(self):
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qs1 = Number.objects.filter(num__lte=1).values(alias=F("other_num"))
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qs2 = Number.objects.filter(num__gte=2, num__lte=3).values(alias=F("other_num"))
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self.assertQuerysetEqual(
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qs1.union(qs2).order_by(F("alias").desc()),
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[10, 9, 8, 7],
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operator.itemgetter("alias"),
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)
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Number.objects.create(num=-1)
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self.assertQuerysetEqual(
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qs1.union(qs2).order_by(F("alias").desc(nulls_last=True)),
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[10, 9, 8, 7, None],
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operator.itemgetter("alias"),
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)
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def test_union_with_values(self):
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ReservedName.objects.create(name="a", order=2)
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qs1 = ReservedName.objects.all()
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reserved_name = qs1.union(qs1).values("name", "order", "id").get()
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self.assertEqual(reserved_name["name"], "a")
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self.assertEqual(reserved_name["order"], 2)
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reserved_name = qs1.union(qs1).values_list("name", "order", "id").get()
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self.assertEqual(reserved_name[:2], ("a", 2))
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# List of columns can be changed.
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reserved_name = qs1.union(qs1).values_list("order").get()
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self.assertEqual(reserved_name, (2,))
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def test_union_with_two_annotated_values_list(self):
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qs1 = (
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Number.objects.filter(num=1)
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.annotate(
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count=Value(0, IntegerField()),
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)
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.values_list("num", "count")
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)
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qs2 = (
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Number.objects.filter(num=2)
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.values("pk")
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.annotate(
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count=F("num"),
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)
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.annotate(
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num=Value(1, IntegerField()),
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)
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.values_list("num", "count")
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)
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self.assertCountEqual(qs1.union(qs2), [(1, 0), (2, 1)])
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def test_union_with_extra_and_values_list(self):
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qs1 = (
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Number.objects.filter(num=1)
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.extra(
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select={"count": 0},
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)
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.values_list("num", "count")
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)
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qs2 = Number.objects.filter(num=2).extra(select={"count": 1})
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self.assertCountEqual(qs1.union(qs2), [(1, 0), (2, 1)])
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def test_union_with_values_list_on_annotated_and_unannotated(self):
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ReservedName.objects.create(name="rn1", order=1)
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qs1 = Number.objects.annotate(
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has_reserved_name=Exists(ReservedName.objects.filter(order=OuterRef("num")))
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).filter(has_reserved_name=True)
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qs2 = Number.objects.filter(num=9)
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self.assertCountEqual(qs1.union(qs2).values_list("num", flat=True), [1, 9])
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def test_union_with_values_list_and_order(self):
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ReservedName.objects.bulk_create(
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[
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ReservedName(name="rn1", order=7),
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ReservedName(name="rn2", order=5),
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ReservedName(name="rn0", order=6),
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ReservedName(name="rn9", order=-1),
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]
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)
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qs1 = ReservedName.objects.filter(order__gte=6)
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qs2 = ReservedName.objects.filter(order__lte=5)
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union_qs = qs1.union(qs2)
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for qs, expected_result in (
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# Order by a single column.
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(union_qs.order_by("-pk").values_list("order", flat=True), [-1, 6, 5, 7]),
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(union_qs.order_by("pk").values_list("order", flat=True), [7, 5, 6, -1]),
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(union_qs.values_list("order", flat=True).order_by("-pk"), [-1, 6, 5, 7]),
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(union_qs.values_list("order", flat=True).order_by("pk"), [7, 5, 6, -1]),
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# Order by multiple columns.
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(
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union_qs.order_by("-name", "pk").values_list("order", flat=True),
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[-1, 5, 7, 6],
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),
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(
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union_qs.values_list("order", flat=True).order_by("-name", "pk"),
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[-1, 5, 7, 6],
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),
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):
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with self.subTest(qs=qs):
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self.assertEqual(list(qs), expected_result)
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def test_union_with_values_list_and_order_on_annotation(self):
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qs1 = Number.objects.annotate(
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annotation=Value(-1),
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multiplier=F("annotation"),
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).filter(num__gte=6)
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qs2 = Number.objects.annotate(
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annotation=Value(2),
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multiplier=F("annotation"),
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).filter(num__lte=5)
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self.assertSequenceEqual(
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qs1.union(qs2).order_by("annotation", "num").values_list("num", flat=True),
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[6, 7, 8, 9, 0, 1, 2, 3, 4, 5],
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)
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self.assertQuerysetEqual(
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qs1.union(qs2)
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.order_by(
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F("annotation") * F("multiplier"),
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"num",
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)
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.values("num"),
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[6, 7, 8, 9, 0, 1, 2, 3, 4, 5],
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operator.itemgetter("num"),
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)
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def test_union_multiple_models_with_values_list_and_order(self):
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reserved_name = ReservedName.objects.create(name="rn1", order=0)
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qs1 = Celebrity.objects.all()
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qs2 = ReservedName.objects.all()
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self.assertSequenceEqual(
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qs1.union(qs2).order_by("name").values_list("pk", flat=True),
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[reserved_name.pk],
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)
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def test_union_multiple_models_with_values_list_and_order_by_extra_select(self):
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reserved_name = ReservedName.objects.create(name="rn1", order=0)
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qs1 = Celebrity.objects.extra(select={"extra_name": "name"})
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qs2 = ReservedName.objects.extra(select={"extra_name": "name"})
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self.assertSequenceEqual(
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qs1.union(qs2).order_by("extra_name").values_list("pk", flat=True),
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[reserved_name.pk],
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)
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def test_union_in_subquery(self):
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ReservedName.objects.bulk_create(
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[
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ReservedName(name="rn1", order=8),
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ReservedName(name="rn2", order=1),
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ReservedName(name="rn3", order=5),
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]
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)
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qs1 = Number.objects.filter(num__gt=7, num=OuterRef("order"))
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qs2 = Number.objects.filter(num__lt=2, num=OuterRef("order"))
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self.assertCountEqual(
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ReservedName.objects.annotate(
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number=Subquery(qs1.union(qs2).values("num")),
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)
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.filter(number__isnull=False)
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.values_list("order", flat=True),
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[8, 1],
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)
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def test_union_in_subquery_related_outerref(self):
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e1 = ExtraInfo.objects.create(value=7, info="e3")
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e2 = ExtraInfo.objects.create(value=5, info="e2")
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e3 = ExtraInfo.objects.create(value=1, info="e1")
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Author.objects.bulk_create(
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[
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Author(name="a1", num=1, extra=e1),
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Author(name="a2", num=3, extra=e2),
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Author(name="a3", num=2, extra=e3),
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]
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)
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qs1 = ExtraInfo.objects.order_by().filter(value=OuterRef("num"))
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qs2 = ExtraInfo.objects.order_by().filter(value__lt=OuterRef("extra__value"))
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qs = (
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Author.objects.annotate(
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info=Subquery(qs1.union(qs2).values("info")[:1]),
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)
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.filter(info__isnull=False)
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.values_list("name", flat=True)
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)
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self.assertCountEqual(qs, ["a1", "a2"])
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# Combined queries don't mutate.
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self.assertCountEqual(qs, ["a1", "a2"])
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def test_count_union(self):
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qs1 = Number.objects.filter(num__lte=1).values("num")
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qs2 = Number.objects.filter(num__gte=2, num__lte=3).values("num")
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self.assertEqual(qs1.union(qs2).count(), 4)
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def test_count_union_empty_result(self):
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qs = Number.objects.filter(pk__in=[])
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self.assertEqual(qs.union(qs).count(), 0)
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@skipUnlessDBFeature("supports_select_difference")
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def test_count_difference(self):
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qs1 = Number.objects.filter(num__lt=10)
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qs2 = Number.objects.filter(num__lt=9)
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self.assertEqual(qs1.difference(qs2).count(), 1)
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@skipUnlessDBFeature("supports_select_intersection")
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def test_count_intersection(self):
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qs1 = Number.objects.filter(num__gte=5)
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qs2 = Number.objects.filter(num__lte=5)
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self.assertEqual(qs1.intersection(qs2).count(), 1)
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def test_exists_union(self):
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qs1 = Number.objects.filter(num__gte=5)
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qs2 = Number.objects.filter(num__lte=5)
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with CaptureQueriesContext(connection) as context:
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self.assertIs(qs1.union(qs2).exists(), True)
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captured_queries = context.captured_queries
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self.assertEqual(len(captured_queries), 1)
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captured_sql = captured_queries[0]["sql"]
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self.assertNotIn(
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connection.ops.quote_name(Number._meta.pk.column),
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captured_sql,
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)
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self.assertEqual(
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captured_sql.count(connection.ops.limit_offset_sql(None, 1)),
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3 if connection.features.supports_slicing_ordering_in_compound else 1,
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)
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def test_exists_union_empty_result(self):
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qs = Number.objects.filter(pk__in=[])
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self.assertIs(qs.union(qs).exists(), False)
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@skipUnlessDBFeature("supports_select_intersection")
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def test_exists_intersection(self):
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qs1 = Number.objects.filter(num__gt=5)
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qs2 = Number.objects.filter(num__lt=5)
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self.assertIs(qs1.intersection(qs1).exists(), True)
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self.assertIs(qs1.intersection(qs2).exists(), False)
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@skipUnlessDBFeature("supports_select_difference")
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def test_exists_difference(self):
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qs1 = Number.objects.filter(num__gte=5)
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qs2 = Number.objects.filter(num__gte=3)
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self.assertIs(qs1.difference(qs2).exists(), False)
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self.assertIs(qs2.difference(qs1).exists(), True)
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def test_get_union(self):
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qs = Number.objects.filter(num=2)
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self.assertEqual(qs.union(qs).get().num, 2)
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@skipUnlessDBFeature("supports_select_difference")
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def test_get_difference(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.exclude(num=2)
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self.assertEqual(qs1.difference(qs2).get().num, 2)
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@skipUnlessDBFeature("supports_select_intersection")
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def test_get_intersection(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.filter(num=2)
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self.assertEqual(qs1.intersection(qs2).get().num, 2)
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@skipUnlessDBFeature("supports_slicing_ordering_in_compound")
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def test_ordering_subqueries(self):
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qs1 = Number.objects.order_by("num")[:2]
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qs2 = Number.objects.order_by("-num")[:2]
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self.assertNumbersEqual(qs1.union(qs2).order_by("-num")[:4], [9, 8, 1, 0])
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@skipIfDBFeature("supports_slicing_ordering_in_compound")
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def test_unsupported_ordering_slicing_raises_db_error(self):
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qs1 = Number.objects.all()
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qs2 = Number.objects.all()
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qs3 = Number.objects.all()
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msg = "LIMIT/OFFSET not allowed in subqueries of compound statements"
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with self.assertRaisesMessage(DatabaseError, msg):
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list(qs1.union(qs2[:10]))
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msg = "ORDER BY not allowed in subqueries of compound statements"
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with self.assertRaisesMessage(DatabaseError, msg):
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list(qs1.order_by("id").union(qs2))
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with self.assertRaisesMessage(DatabaseError, msg):
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list(qs1.union(qs2).order_by("id").union(qs3))
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@skipIfDBFeature("supports_select_intersection")
|
|
def test_unsupported_intersection_raises_db_error(self):
|
|
qs1 = Number.objects.all()
|
|
qs2 = Number.objects.all()
|
|
msg = "intersection is not supported on this database backend"
|
|
with self.assertRaisesMessage(NotSupportedError, msg):
|
|
list(qs1.intersection(qs2))
|
|
|
|
def test_combining_multiple_models(self):
|
|
ReservedName.objects.create(name="99 little bugs", order=99)
|
|
qs1 = Number.objects.filter(num=1).values_list("num", flat=True)
|
|
qs2 = ReservedName.objects.values_list("order")
|
|
self.assertEqual(list(qs1.union(qs2).order_by("num")), [1, 99])
|
|
|
|
def test_order_raises_on_non_selected_column(self):
|
|
qs1 = (
|
|
Number.objects.filter()
|
|
.annotate(
|
|
annotation=Value(1, IntegerField()),
|
|
)
|
|
.values("annotation", num2=F("num"))
|
|
)
|
|
qs2 = Number.objects.filter().values("id", "num")
|
|
# Should not raise
|
|
list(qs1.union(qs2).order_by("annotation"))
|
|
list(qs1.union(qs2).order_by("num2"))
|
|
msg = "ORDER BY term does not match any column in the result set"
|
|
# 'id' is not part of the select
|
|
with self.assertRaisesMessage(DatabaseError, msg):
|
|
list(qs1.union(qs2).order_by("id"))
|
|
# 'num' got realiased to num2
|
|
with self.assertRaisesMessage(DatabaseError, msg):
|
|
list(qs1.union(qs2).order_by("num"))
|
|
with self.assertRaisesMessage(DatabaseError, msg):
|
|
list(qs1.union(qs2).order_by(F("num")))
|
|
with self.assertRaisesMessage(DatabaseError, msg):
|
|
list(qs1.union(qs2).order_by(F("num").desc()))
|
|
# switched order, now 'exists' again:
|
|
list(qs2.union(qs1).order_by("num"))
|
|
|
|
@skipUnlessDBFeature("supports_select_difference", "supports_select_intersection")
|
|
def test_qs_with_subcompound_qs(self):
|
|
qs1 = Number.objects.all()
|
|
qs2 = Number.objects.intersection(Number.objects.filter(num__gt=1))
|
|
self.assertEqual(qs1.difference(qs2).count(), 2)
|
|
|
|
def test_order_by_same_type(self):
|
|
qs = Number.objects.all()
|
|
union = qs.union(qs)
|
|
numbers = list(range(10))
|
|
self.assertNumbersEqual(union.order_by("num"), numbers)
|
|
self.assertNumbersEqual(union.order_by("other_num"), reversed(numbers))
|
|
|
|
def test_unsupported_operations_on_combined_qs(self):
|
|
qs = Number.objects.all()
|
|
msg = "Calling QuerySet.%s() after %s() is not supported."
|
|
combinators = ["union"]
|
|
if connection.features.supports_select_difference:
|
|
combinators.append("difference")
|
|
if connection.features.supports_select_intersection:
|
|
combinators.append("intersection")
|
|
for combinator in combinators:
|
|
for operation in (
|
|
"alias",
|
|
"annotate",
|
|
"defer",
|
|
"delete",
|
|
"distinct",
|
|
"exclude",
|
|
"extra",
|
|
"filter",
|
|
"only",
|
|
"prefetch_related",
|
|
"select_related",
|
|
"update",
|
|
):
|
|
with self.subTest(combinator=combinator, operation=operation):
|
|
with self.assertRaisesMessage(
|
|
NotSupportedError,
|
|
msg % (operation, combinator),
|
|
):
|
|
getattr(getattr(qs, combinator)(qs), operation)()
|
|
with self.assertRaisesMessage(
|
|
NotSupportedError,
|
|
msg % ("contains", combinator),
|
|
):
|
|
obj = Number.objects.first()
|
|
getattr(qs, combinator)(qs).contains(obj)
|
|
|
|
def test_get_with_filters_unsupported_on_combined_qs(self):
|
|
qs = Number.objects.all()
|
|
msg = "Calling QuerySet.get(...) with filters after %s() is not supported."
|
|
combinators = ["union"]
|
|
if connection.features.supports_select_difference:
|
|
combinators.append("difference")
|
|
if connection.features.supports_select_intersection:
|
|
combinators.append("intersection")
|
|
for combinator in combinators:
|
|
with self.subTest(combinator=combinator):
|
|
with self.assertRaisesMessage(NotSupportedError, msg % combinator):
|
|
getattr(qs, combinator)(qs).get(num=2)
|
|
|
|
def test_operator_on_combined_qs_error(self):
|
|
qs = Number.objects.all()
|
|
msg = "Cannot use %s operator with combined queryset."
|
|
combinators = ["union"]
|
|
if connection.features.supports_select_difference:
|
|
combinators.append("difference")
|
|
if connection.features.supports_select_intersection:
|
|
combinators.append("intersection")
|
|
operators = [
|
|
("|", operator.or_),
|
|
("&", operator.and_),
|
|
("^", operator.xor),
|
|
]
|
|
for combinator in combinators:
|
|
combined_qs = getattr(qs, combinator)(qs)
|
|
for operator_, operator_func in operators:
|
|
with self.subTest(combinator=combinator):
|
|
with self.assertRaisesMessage(TypeError, msg % operator_):
|
|
operator_func(qs, combined_qs)
|
|
with self.assertRaisesMessage(TypeError, msg % operator_):
|
|
operator_func(combined_qs, qs)
|