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from django.db.models import Count, Max, Q
from django.test import TestCase
from .models import Comment, Tenant, User
class CompositePKAggregateTests(TestCase):
@classmethod
def setUpTestData(cls):
cls.tenant_1 = Tenant.objects.create()
cls.tenant_2 = Tenant.objects.create()
cls.user_1 = User.objects.create(
tenant=cls.tenant_1,
id=1,
email="user0001@example.com",
)
cls.user_2 = User.objects.create(
tenant=cls.tenant_1,
id=2,
email="user0002@example.com",
)
cls.user_3 = User.objects.create(
tenant=cls.tenant_2,
id=3,
email="user0003@example.com",
)
cls.comment_1 = Comment.objects.create(id=1, user=cls.user_2, text="foo")
cls.comment_2 = Comment.objects.create(id=2, user=cls.user_1, text="bar")
cls.comment_3 = Comment.objects.create(id=3, user=cls.user_1, text="foobar")
cls.comment_4 = Comment.objects.create(id=4, user=cls.user_3, text="foobarbaz")
cls.comment_5 = Comment.objects.create(id=5, user=cls.user_3, text="barbaz")
cls.comment_6 = Comment.objects.create(id=6, user=cls.user_3, text="baz")
def test_users_annotated_with_comments_id_count(self):
user_1, user_2, user_3 = User.objects.annotate(Count("comments__id")).order_by(
"pk"
)
self.assertEqual(user_1, self.user_1)
self.assertEqual(user_1.comments__id__count, 2)
self.assertEqual(user_2, self.user_2)
self.assertEqual(user_2.comments__id__count, 1)
self.assertEqual(user_3, self.user_3)
self.assertEqual(user_3.comments__id__count, 3)
def test_users_annotated_with_aliased_comments_id_count(self):
user_1, user_2, user_3 = User.objects.annotate(
comments_count=Count("comments__id")
).order_by("pk")
self.assertEqual(user_1, self.user_1)
self.assertEqual(user_1.comments_count, 2)
self.assertEqual(user_2, self.user_2)
self.assertEqual(user_2.comments_count, 1)
self.assertEqual(user_3, self.user_3)
self.assertEqual(user_3.comments_count, 3)
def test_users_annotated_with_comments_count(self):
user_1, user_2, user_3 = User.objects.annotate(Count("comments")).order_by("pk")
self.assertEqual(user_1, self.user_1)
self.assertEqual(user_1.comments__count, 2)
self.assertEqual(user_2, self.user_2)
self.assertEqual(user_2.comments__count, 1)
self.assertEqual(user_3, self.user_3)
self.assertEqual(user_3.comments__count, 3)
def test_users_annotated_with_comments_count_filter(self):
user_1, user_2, user_3 = User.objects.annotate(
comments__count=Count(
"comments", filter=Q(pk__in=[self.user_1.pk, self.user_2.pk])
)
).order_by("pk")
self.assertEqual(user_1, self.user_1)
self.assertEqual(user_1.comments__count, 2)
self.assertEqual(user_2, self.user_2)
self.assertEqual(user_2.comments__count, 1)
self.assertEqual(user_3, self.user_3)
self.assertEqual(user_3.comments__count, 0)
def test_count_distinct_not_supported(self):
with self.assertRaisesMessage(
ValueError, "COUNT(DISTINCT) doesn't support composite primary keys"
):
self.assertIsNone(
User.objects.annotate(comments__count=Count("comments", distinct=True))
)
def test_user_values_annotated_with_comments_id_count(self):
self.assertSequenceEqual(
User.objects.values("pk").annotate(Count("comments__id")).order_by("pk"),
(
{"pk": self.user_1.pk, "comments__id__count": 2},
{"pk": self.user_2.pk, "comments__id__count": 1},
{"pk": self.user_3.pk, "comments__id__count": 3},
),
)
def test_user_values_annotated_with_filtered_comments_id_count(self):
self.assertSequenceEqual(
User.objects.values("pk")
.annotate(
comments_count=Count(
"comments__id",
filter=Q(comments__text__icontains="foo"),
)
)
.order_by("pk"),
(
{"pk": self.user_1.pk, "comments_count": 1},
{"pk": self.user_2.pk, "comments_count": 1},
{"pk": self.user_3.pk, "comments_count": 1},
),
)
def test_filter_and_count_users_by_comments_fields(self):
users = User.objects.filter(comments__id__gt=2).order_by("pk")
self.assertEqual(users.count(), 4)
self.assertSequenceEqual(
users, (self.user_1, self.user_3, self.user_3, self.user_3)
)
users = User.objects.filter(comments__text__icontains="foo").order_by("pk")
self.assertEqual(users.count(), 3)
self.assertSequenceEqual(users, (self.user_1, self.user_2, self.user_3))
users = User.objects.filter(comments__text__icontains="baz").order_by("pk")
self.assertEqual(users.count(), 3)
self.assertSequenceEqual(users, (self.user_3, self.user_3, self.user_3))
def test_order_by_comments_id_count(self):
self.assertSequenceEqual(
User.objects.annotate(comments_count=Count("comments__id")).order_by(
"-comments_count"
),
(self.user_3, self.user_1, self.user_2),
)
def test_max_pk(self):
msg = "Max expression does not support composite primary keys."
with self.assertRaisesMessage(ValueError, msg):
Comment.objects.aggregate(Max("pk"))
|
