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django/tests/postgres_tests/test_aggregates.py
2023-09-18 22:12:40 +02:00

910 lines
36 KiB
Python

from django.db import connection, transaction
from django.db.models import (
CharField,
F,
Func,
IntegerField,
JSONField,
OuterRef,
Q,
Subquery,
Value,
Window,
)
from django.db.models.fields.json import KeyTextTransform, KeyTransform
from django.db.models.functions import Cast, Concat, Substr
from django.test import skipUnlessDBFeature
from django.test.utils import Approximate
from django.utils import timezone
from . import PostgreSQLTestCase
from .models import AggregateTestModel, HotelReservation, Room, StatTestModel
try:
from django.contrib.postgres.aggregates import (
ArrayAgg,
BitAnd,
BitOr,
BitXor,
BoolAnd,
BoolOr,
Corr,
CovarPop,
JSONBAgg,
RegrAvgX,
RegrAvgY,
RegrCount,
RegrIntercept,
RegrR2,
RegrSlope,
RegrSXX,
RegrSXY,
RegrSYY,
StatAggregate,
StringAgg,
)
from django.contrib.postgres.fields import ArrayField
except ImportError:
pass # psycopg2 is not installed
class TestGeneralAggregate(PostgreSQLTestCase):
@classmethod
def setUpTestData(cls):
cls.aggs = AggregateTestModel.objects.bulk_create(
[
AggregateTestModel(
boolean_field=True,
char_field="Foo1",
text_field="Text1",
integer_field=0,
),
AggregateTestModel(
boolean_field=False,
char_field="Foo2",
text_field="Text2",
integer_field=1,
json_field={"lang": "pl"},
),
AggregateTestModel(
boolean_field=False,
char_field="Foo4",
text_field="Text4",
integer_field=2,
json_field={"lang": "en"},
),
AggregateTestModel(
boolean_field=True,
char_field="Foo3",
text_field="Text3",
integer_field=0,
json_field={"breed": "collie"},
),
]
)
def test_empty_result_set(self):
AggregateTestModel.objects.all().delete()
tests = [
ArrayAgg("char_field"),
ArrayAgg("integer_field"),
ArrayAgg("boolean_field"),
BitAnd("integer_field"),
BitOr("integer_field"),
BoolAnd("boolean_field"),
BoolOr("boolean_field"),
JSONBAgg("integer_field"),
StringAgg("char_field", delimiter=";"),
]
if connection.features.has_bit_xor:
tests.append(BitXor("integer_field"))
for aggregation in tests:
with self.subTest(aggregation=aggregation):
# Empty result with non-execution optimization.
with self.assertNumQueries(0):
values = AggregateTestModel.objects.none().aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": None})
# Empty result when query must be executed.
with self.assertNumQueries(1):
values = AggregateTestModel.objects.aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": None})
def test_default_argument(self):
AggregateTestModel.objects.all().delete()
tests = [
(ArrayAgg("char_field", default=["<empty>"]), ["<empty>"]),
(ArrayAgg("integer_field", default=[0]), [0]),
(ArrayAgg("boolean_field", default=[False]), [False]),
(BitAnd("integer_field", default=0), 0),
(BitOr("integer_field", default=0), 0),
(BoolAnd("boolean_field", default=False), False),
(BoolOr("boolean_field", default=False), False),
(JSONBAgg("integer_field", default=["<empty>"]), ["<empty>"]),
(
JSONBAgg("integer_field", default=Value(["<empty>"], JSONField())),
["<empty>"],
),
(StringAgg("char_field", delimiter=";", default="<empty>"), "<empty>"),
(
StringAgg("char_field", delimiter=";", default=Value("<empty>")),
"<empty>",
),
]
if connection.features.has_bit_xor:
tests.append((BitXor("integer_field", default=0), 0))
for aggregation, expected_result in tests:
with self.subTest(aggregation=aggregation):
# Empty result with non-execution optimization.
with self.assertNumQueries(0):
values = AggregateTestModel.objects.none().aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": expected_result})
# Empty result when query must be executed.
with transaction.atomic(), self.assertNumQueries(1):
values = AggregateTestModel.objects.aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": expected_result})
def test_array_agg_charfield(self):
values = AggregateTestModel.objects.aggregate(arrayagg=ArrayAgg("char_field"))
self.assertEqual(values, {"arrayagg": ["Foo1", "Foo2", "Foo4", "Foo3"]})
def test_array_agg_charfield_ordering(self):
ordering_test_cases = (
(F("char_field").desc(), ["Foo4", "Foo3", "Foo2", "Foo1"]),
(F("char_field").asc(), ["Foo1", "Foo2", "Foo3", "Foo4"]),
(F("char_field"), ["Foo1", "Foo2", "Foo3", "Foo4"]),
(
[F("boolean_field"), F("char_field").desc()],
["Foo4", "Foo2", "Foo3", "Foo1"],
),
(
(F("boolean_field"), F("char_field").desc()),
["Foo4", "Foo2", "Foo3", "Foo1"],
),
("char_field", ["Foo1", "Foo2", "Foo3", "Foo4"]),
("-char_field", ["Foo4", "Foo3", "Foo2", "Foo1"]),
(Concat("char_field", Value("@")), ["Foo1", "Foo2", "Foo3", "Foo4"]),
(Concat("char_field", Value("@")).desc(), ["Foo4", "Foo3", "Foo2", "Foo1"]),
(
(
Substr("char_field", 1, 1),
F("integer_field"),
Substr("char_field", 4, 1).desc(),
),
["Foo3", "Foo1", "Foo2", "Foo4"],
),
)
for ordering, expected_output in ordering_test_cases:
with self.subTest(ordering=ordering, expected_output=expected_output):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("char_field", ordering=ordering)
)
self.assertEqual(values, {"arrayagg": expected_output})
def test_array_agg_integerfield(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("integer_field")
)
self.assertEqual(values, {"arrayagg": [0, 1, 2, 0]})
def test_array_agg_integerfield_ordering(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("integer_field", ordering=F("integer_field").desc())
)
self.assertEqual(values, {"arrayagg": [2, 1, 0, 0]})
def test_array_agg_booleanfield(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("boolean_field")
)
self.assertEqual(values, {"arrayagg": [True, False, False, True]})
def test_array_agg_booleanfield_ordering(self):
ordering_test_cases = (
(F("boolean_field").asc(), [False, False, True, True]),
(F("boolean_field").desc(), [True, True, False, False]),
(F("boolean_field"), [False, False, True, True]),
)
for ordering, expected_output in ordering_test_cases:
with self.subTest(ordering=ordering, expected_output=expected_output):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("boolean_field", ordering=ordering)
)
self.assertEqual(values, {"arrayagg": expected_output})
def test_array_agg_jsonfield(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg(
KeyTransform("lang", "json_field"),
filter=Q(json_field__lang__isnull=False),
),
)
self.assertEqual(values, {"arrayagg": ["pl", "en"]})
def test_array_agg_jsonfield_ordering(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg(
KeyTransform("lang", "json_field"),
filter=Q(json_field__lang__isnull=False),
ordering=KeyTransform("lang", "json_field"),
),
)
self.assertEqual(values, {"arrayagg": ["en", "pl"]})
def test_array_agg_filter(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("integer_field", filter=Q(integer_field__gt=0)),
)
self.assertEqual(values, {"arrayagg": [1, 2]})
def test_array_agg_lookups(self):
aggr1 = AggregateTestModel.objects.create()
aggr2 = AggregateTestModel.objects.create()
StatTestModel.objects.create(related_field=aggr1, int1=1, int2=0)
StatTestModel.objects.create(related_field=aggr1, int1=2, int2=0)
StatTestModel.objects.create(related_field=aggr2, int1=3, int2=0)
StatTestModel.objects.create(related_field=aggr2, int1=4, int2=0)
qs = (
StatTestModel.objects.values("related_field")
.annotate(array=ArrayAgg("int1"))
.filter(array__overlap=[2])
.values_list("array", flat=True)
)
self.assertCountEqual(qs.get(), [1, 2])
def test_array_agg_filter_index(self):
aggr1 = AggregateTestModel.objects.create(integer_field=1)
aggr2 = AggregateTestModel.objects.create(integer_field=2)
StatTestModel.objects.bulk_create(
[
StatTestModel(related_field=aggr1, int1=1, int2=0),
StatTestModel(related_field=aggr1, int1=2, int2=1),
StatTestModel(related_field=aggr2, int1=3, int2=0),
StatTestModel(related_field=aggr2, int1=4, int2=1),
]
)
qs = (
AggregateTestModel.objects.filter(pk__in=[aggr1.pk, aggr2.pk])
.annotate(
array=ArrayAgg("stattestmodel__int1", filter=Q(stattestmodel__int2=0))
)
.annotate(array_value=F("array__0"))
.values_list("array_value", flat=True)
)
self.assertCountEqual(qs, [1, 3])
def test_array_agg_filter_slice(self):
aggr1 = AggregateTestModel.objects.create(integer_field=1)
aggr2 = AggregateTestModel.objects.create(integer_field=2)
StatTestModel.objects.bulk_create(
[
StatTestModel(related_field=aggr1, int1=1, int2=0),
StatTestModel(related_field=aggr1, int1=2, int2=1),
StatTestModel(related_field=aggr2, int1=3, int2=0),
StatTestModel(related_field=aggr2, int1=4, int2=1),
StatTestModel(related_field=aggr2, int1=5, int2=0),
]
)
qs = (
AggregateTestModel.objects.filter(pk__in=[aggr1.pk, aggr2.pk])
.annotate(
array=ArrayAgg("stattestmodel__int1", filter=Q(stattestmodel__int2=0))
)
.annotate(array_value=F("array__1_2"))
.values_list("array_value", flat=True)
)
self.assertCountEqual(qs, [[], [5]])
def test_bit_and_general(self):
values = AggregateTestModel.objects.filter(integer_field__in=[0, 1]).aggregate(
bitand=BitAnd("integer_field")
)
self.assertEqual(values, {"bitand": 0})
def test_bit_and_on_only_true_values(self):
values = AggregateTestModel.objects.filter(integer_field=1).aggregate(
bitand=BitAnd("integer_field")
)
self.assertEqual(values, {"bitand": 1})
def test_bit_and_on_only_false_values(self):
values = AggregateTestModel.objects.filter(integer_field=0).aggregate(
bitand=BitAnd("integer_field")
)
self.assertEqual(values, {"bitand": 0})
def test_bit_or_general(self):
values = AggregateTestModel.objects.filter(integer_field__in=[0, 1]).aggregate(
bitor=BitOr("integer_field")
)
self.assertEqual(values, {"bitor": 1})
def test_bit_or_on_only_true_values(self):
values = AggregateTestModel.objects.filter(integer_field=1).aggregate(
bitor=BitOr("integer_field")
)
self.assertEqual(values, {"bitor": 1})
def test_bit_or_on_only_false_values(self):
values = AggregateTestModel.objects.filter(integer_field=0).aggregate(
bitor=BitOr("integer_field")
)
self.assertEqual(values, {"bitor": 0})
@skipUnlessDBFeature("has_bit_xor")
def test_bit_xor_general(self):
AggregateTestModel.objects.create(integer_field=3)
values = AggregateTestModel.objects.filter(
integer_field__in=[1, 3],
).aggregate(bitxor=BitXor("integer_field"))
self.assertEqual(values, {"bitxor": 2})
@skipUnlessDBFeature("has_bit_xor")
def test_bit_xor_on_only_true_values(self):
values = AggregateTestModel.objects.filter(
integer_field=1,
).aggregate(bitxor=BitXor("integer_field"))
self.assertEqual(values, {"bitxor": 1})
@skipUnlessDBFeature("has_bit_xor")
def test_bit_xor_on_only_false_values(self):
values = AggregateTestModel.objects.filter(
integer_field=0,
).aggregate(bitxor=BitXor("integer_field"))
self.assertEqual(values, {"bitxor": 0})
def test_bool_and_general(self):
values = AggregateTestModel.objects.aggregate(booland=BoolAnd("boolean_field"))
self.assertEqual(values, {"booland": False})
def test_bool_and_q_object(self):
values = AggregateTestModel.objects.aggregate(
booland=BoolAnd(Q(integer_field__gt=2)),
)
self.assertEqual(values, {"booland": False})
def test_bool_or_general(self):
values = AggregateTestModel.objects.aggregate(boolor=BoolOr("boolean_field"))
self.assertEqual(values, {"boolor": True})
def test_bool_or_q_object(self):
values = AggregateTestModel.objects.aggregate(
boolor=BoolOr(Q(integer_field__gt=2)),
)
self.assertEqual(values, {"boolor": False})
def test_string_agg_requires_delimiter(self):
with self.assertRaises(TypeError):
AggregateTestModel.objects.aggregate(stringagg=StringAgg("char_field"))
def test_string_agg_delimiter_escaping(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg("char_field", delimiter="'")
)
self.assertEqual(values, {"stringagg": "Foo1'Foo2'Foo4'Foo3"})
def test_string_agg_charfield(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg("char_field", delimiter=";")
)
self.assertEqual(values, {"stringagg": "Foo1;Foo2;Foo4;Foo3"})
def test_string_agg_default_output_field(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg("text_field", delimiter=";"),
)
self.assertEqual(values, {"stringagg": "Text1;Text2;Text4;Text3"})
def test_string_agg_charfield_ordering(self):
ordering_test_cases = (
(F("char_field").desc(), "Foo4;Foo3;Foo2;Foo1"),
(F("char_field").asc(), "Foo1;Foo2;Foo3;Foo4"),
(F("char_field"), "Foo1;Foo2;Foo3;Foo4"),
("char_field", "Foo1;Foo2;Foo3;Foo4"),
("-char_field", "Foo4;Foo3;Foo2;Foo1"),
(Concat("char_field", Value("@")), "Foo1;Foo2;Foo3;Foo4"),
(Concat("char_field", Value("@")).desc(), "Foo4;Foo3;Foo2;Foo1"),
)
for ordering, expected_output in ordering_test_cases:
with self.subTest(ordering=ordering, expected_output=expected_output):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg("char_field", delimiter=";", ordering=ordering)
)
self.assertEqual(values, {"stringagg": expected_output})
def test_string_agg_jsonfield_ordering(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg(
KeyTextTransform("lang", "json_field"),
delimiter=";",
ordering=KeyTextTransform("lang", "json_field"),
output_field=CharField(),
),
)
self.assertEqual(values, {"stringagg": "en;pl"})
def test_string_agg_filter(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg(
"char_field",
delimiter=";",
filter=Q(char_field__endswith="3") | Q(char_field__endswith="1"),
)
)
self.assertEqual(values, {"stringagg": "Foo1;Foo3"})
def test_orderable_agg_alternative_fields(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("integer_field", ordering=F("char_field").asc())
)
self.assertEqual(values, {"arrayagg": [0, 1, 0, 2]})
def test_jsonb_agg(self):
values = AggregateTestModel.objects.aggregate(jsonbagg=JSONBAgg("char_field"))
self.assertEqual(values, {"jsonbagg": ["Foo1", "Foo2", "Foo4", "Foo3"]})
def test_jsonb_agg_charfield_ordering(self):
ordering_test_cases = (
(F("char_field").desc(), ["Foo4", "Foo3", "Foo2", "Foo1"]),
(F("char_field").asc(), ["Foo1", "Foo2", "Foo3", "Foo4"]),
(F("char_field"), ["Foo1", "Foo2", "Foo3", "Foo4"]),
("char_field", ["Foo1", "Foo2", "Foo3", "Foo4"]),
("-char_field", ["Foo4", "Foo3", "Foo2", "Foo1"]),
(Concat("char_field", Value("@")), ["Foo1", "Foo2", "Foo3", "Foo4"]),
(Concat("char_field", Value("@")).desc(), ["Foo4", "Foo3", "Foo2", "Foo1"]),
)
for ordering, expected_output in ordering_test_cases:
with self.subTest(ordering=ordering, expected_output=expected_output):
values = AggregateTestModel.objects.aggregate(
jsonbagg=JSONBAgg("char_field", ordering=ordering),
)
self.assertEqual(values, {"jsonbagg": expected_output})
def test_jsonb_agg_integerfield_ordering(self):
values = AggregateTestModel.objects.aggregate(
jsonbagg=JSONBAgg("integer_field", ordering=F("integer_field").desc()),
)
self.assertEqual(values, {"jsonbagg": [2, 1, 0, 0]})
def test_jsonb_agg_booleanfield_ordering(self):
ordering_test_cases = (
(F("boolean_field").asc(), [False, False, True, True]),
(F("boolean_field").desc(), [True, True, False, False]),
(F("boolean_field"), [False, False, True, True]),
)
for ordering, expected_output in ordering_test_cases:
with self.subTest(ordering=ordering, expected_output=expected_output):
values = AggregateTestModel.objects.aggregate(
jsonbagg=JSONBAgg("boolean_field", ordering=ordering),
)
self.assertEqual(values, {"jsonbagg": expected_output})
def test_jsonb_agg_jsonfield_ordering(self):
values = AggregateTestModel.objects.aggregate(
jsonbagg=JSONBAgg(
KeyTransform("lang", "json_field"),
filter=Q(json_field__lang__isnull=False),
ordering=KeyTransform("lang", "json_field"),
),
)
self.assertEqual(values, {"jsonbagg": ["en", "pl"]})
def test_jsonb_agg_key_index_transforms(self):
room101 = Room.objects.create(number=101)
room102 = Room.objects.create(number=102)
datetimes = [
timezone.datetime(2018, 6, 20),
timezone.datetime(2018, 6, 24),
timezone.datetime(2018, 6, 28),
]
HotelReservation.objects.create(
datespan=(datetimes[0].date(), datetimes[1].date()),
start=datetimes[0],
end=datetimes[1],
room=room102,
requirements={"double_bed": True, "parking": True},
)
HotelReservation.objects.create(
datespan=(datetimes[1].date(), datetimes[2].date()),
start=datetimes[1],
end=datetimes[2],
room=room102,
requirements={"double_bed": False, "sea_view": True, "parking": False},
)
HotelReservation.objects.create(
datespan=(datetimes[0].date(), datetimes[2].date()),
start=datetimes[0],
end=datetimes[2],
room=room101,
requirements={"sea_view": False},
)
values = (
Room.objects.annotate(
requirements=JSONBAgg(
"hotelreservation__requirements",
ordering="-hotelreservation__start",
)
)
.filter(requirements__0__sea_view=True)
.values("number", "requirements")
)
self.assertSequenceEqual(
values,
[
{
"number": 102,
"requirements": [
{"double_bed": False, "sea_view": True, "parking": False},
{"double_bed": True, "parking": True},
],
},
],
)
def test_string_agg_array_agg_ordering_in_subquery(self):
stats = []
for i, agg in enumerate(AggregateTestModel.objects.order_by("char_field")):
stats.append(StatTestModel(related_field=agg, int1=i, int2=i + 1))
stats.append(StatTestModel(related_field=agg, int1=i + 1, int2=i))
StatTestModel.objects.bulk_create(stats)
for aggregate, expected_result in (
(
ArrayAgg("stattestmodel__int1", ordering="-stattestmodel__int2"),
[
("Foo1", [0, 1]),
("Foo2", [1, 2]),
("Foo3", [2, 3]),
("Foo4", [3, 4]),
],
),
(
StringAgg(
Cast("stattestmodel__int1", CharField()),
delimiter=";",
ordering="-stattestmodel__int2",
),
[("Foo1", "0;1"), ("Foo2", "1;2"), ("Foo3", "2;3"), ("Foo4", "3;4")],
),
):
with self.subTest(aggregate=aggregate.__class__.__name__):
subquery = (
AggregateTestModel.objects.filter(
pk=OuterRef("pk"),
)
.annotate(agg=aggregate)
.values("agg")
)
values = (
AggregateTestModel.objects.annotate(
agg=Subquery(subquery),
)
.order_by("char_field")
.values_list("char_field", "agg")
)
self.assertEqual(list(values), expected_result)
def test_string_agg_array_agg_filter_in_subquery(self):
StatTestModel.objects.bulk_create(
[
StatTestModel(related_field=self.aggs[0], int1=0, int2=5),
StatTestModel(related_field=self.aggs[0], int1=1, int2=4),
StatTestModel(related_field=self.aggs[0], int1=2, int2=3),
]
)
for aggregate, expected_result in (
(
ArrayAgg("stattestmodel__int1", filter=Q(stattestmodel__int2__gt=3)),
[("Foo1", [0, 1]), ("Foo2", None)],
),
(
StringAgg(
Cast("stattestmodel__int2", CharField()),
delimiter=";",
filter=Q(stattestmodel__int1__lt=2),
),
[("Foo1", "5;4"), ("Foo2", None)],
),
):
with self.subTest(aggregate=aggregate.__class__.__name__):
subquery = (
AggregateTestModel.objects.filter(
pk=OuterRef("pk"),
)
.annotate(agg=aggregate)
.values("agg")
)
values = (
AggregateTestModel.objects.annotate(
agg=Subquery(subquery),
)
.filter(
char_field__in=["Foo1", "Foo2"],
)
.order_by("char_field")
.values_list("char_field", "agg")
)
self.assertEqual(list(values), expected_result)
def test_string_agg_filter_in_subquery_with_exclude(self):
subquery = (
AggregateTestModel.objects.annotate(
stringagg=StringAgg(
"char_field",
delimiter=";",
filter=Q(char_field__endswith="1"),
)
)
.exclude(stringagg="")
.values("id")
)
self.assertSequenceEqual(
AggregateTestModel.objects.filter(id__in=Subquery(subquery)),
[self.aggs[0]],
)
def test_ordering_isnt_cleared_for_array_subquery(self):
inner_qs = AggregateTestModel.objects.order_by("-integer_field")
qs = AggregateTestModel.objects.annotate(
integers=Func(
Subquery(inner_qs.values("integer_field")),
function="ARRAY",
output_field=ArrayField(base_field=IntegerField()),
),
)
self.assertSequenceEqual(
qs.first().integers,
inner_qs.values_list("integer_field", flat=True),
)
def test_window(self):
self.assertCountEqual(
AggregateTestModel.objects.annotate(
integers=Window(
expression=ArrayAgg("char_field"),
partition_by=F("integer_field"),
)
).values("integers", "char_field"),
[
{"integers": ["Foo1", "Foo3"], "char_field": "Foo1"},
{"integers": ["Foo1", "Foo3"], "char_field": "Foo3"},
{"integers": ["Foo2"], "char_field": "Foo2"},
{"integers": ["Foo4"], "char_field": "Foo4"},
],
)
def test_values_list(self):
tests = [ArrayAgg("integer_field"), JSONBAgg("integer_field")]
for aggregation in tests:
with self.subTest(aggregation=aggregation):
self.assertCountEqual(
AggregateTestModel.objects.values_list(aggregation),
[([0],), ([1],), ([2],), ([0],)],
)
class TestAggregateDistinct(PostgreSQLTestCase):
@classmethod
def setUpTestData(cls):
AggregateTestModel.objects.create(char_field="Foo")
AggregateTestModel.objects.create(char_field="Foo")
AggregateTestModel.objects.create(char_field="Bar")
def test_string_agg_distinct_false(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg("char_field", delimiter=" ", distinct=False)
)
self.assertEqual(values["stringagg"].count("Foo"), 2)
self.assertEqual(values["stringagg"].count("Bar"), 1)
def test_string_agg_distinct_true(self):
values = AggregateTestModel.objects.aggregate(
stringagg=StringAgg("char_field", delimiter=" ", distinct=True)
)
self.assertEqual(values["stringagg"].count("Foo"), 1)
self.assertEqual(values["stringagg"].count("Bar"), 1)
def test_array_agg_distinct_false(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("char_field", distinct=False)
)
self.assertEqual(sorted(values["arrayagg"]), ["Bar", "Foo", "Foo"])
def test_array_agg_distinct_true(self):
values = AggregateTestModel.objects.aggregate(
arrayagg=ArrayAgg("char_field", distinct=True)
)
self.assertEqual(sorted(values["arrayagg"]), ["Bar", "Foo"])
def test_jsonb_agg_distinct_false(self):
values = AggregateTestModel.objects.aggregate(
jsonbagg=JSONBAgg("char_field", distinct=False),
)
self.assertEqual(sorted(values["jsonbagg"]), ["Bar", "Foo", "Foo"])
def test_jsonb_agg_distinct_true(self):
values = AggregateTestModel.objects.aggregate(
jsonbagg=JSONBAgg("char_field", distinct=True),
)
self.assertEqual(sorted(values["jsonbagg"]), ["Bar", "Foo"])
class TestStatisticsAggregate(PostgreSQLTestCase):
@classmethod
def setUpTestData(cls):
StatTestModel.objects.create(
int1=1,
int2=3,
related_field=AggregateTestModel.objects.create(integer_field=0),
)
StatTestModel.objects.create(
int1=2,
int2=2,
related_field=AggregateTestModel.objects.create(integer_field=1),
)
StatTestModel.objects.create(
int1=3,
int2=1,
related_field=AggregateTestModel.objects.create(integer_field=2),
)
# Tests for base class (StatAggregate)
def test_missing_arguments_raises_exception(self):
with self.assertRaisesMessage(ValueError, "Both y and x must be provided."):
StatAggregate(x=None, y=None)
def test_correct_source_expressions(self):
func = StatAggregate(x="test", y=13)
self.assertIsInstance(func.source_expressions[0], Value)
self.assertIsInstance(func.source_expressions[1], F)
def test_alias_is_required(self):
class SomeFunc(StatAggregate):
function = "TEST"
with self.assertRaisesMessage(TypeError, "Complex aggregates require an alias"):
StatTestModel.objects.aggregate(SomeFunc(y="int2", x="int1"))
# Test aggregates
def test_empty_result_set(self):
StatTestModel.objects.all().delete()
tests = [
(Corr(y="int2", x="int1"), None),
(CovarPop(y="int2", x="int1"), None),
(CovarPop(y="int2", x="int1", sample=True), None),
(RegrAvgX(y="int2", x="int1"), None),
(RegrAvgY(y="int2", x="int1"), None),
(RegrCount(y="int2", x="int1"), 0),
(RegrIntercept(y="int2", x="int1"), None),
(RegrR2(y="int2", x="int1"), None),
(RegrSlope(y="int2", x="int1"), None),
(RegrSXX(y="int2", x="int1"), None),
(RegrSXY(y="int2", x="int1"), None),
(RegrSYY(y="int2", x="int1"), None),
]
for aggregation, expected_result in tests:
with self.subTest(aggregation=aggregation):
# Empty result with non-execution optimization.
with self.assertNumQueries(0):
values = StatTestModel.objects.none().aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": expected_result})
# Empty result when query must be executed.
with self.assertNumQueries(1):
values = StatTestModel.objects.aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": expected_result})
def test_default_argument(self):
StatTestModel.objects.all().delete()
tests = [
(Corr(y="int2", x="int1", default=0), 0),
(CovarPop(y="int2", x="int1", default=0), 0),
(CovarPop(y="int2", x="int1", sample=True, default=0), 0),
(RegrAvgX(y="int2", x="int1", default=0), 0),
(RegrAvgY(y="int2", x="int1", default=0), 0),
# RegrCount() doesn't support the default argument.
(RegrIntercept(y="int2", x="int1", default=0), 0),
(RegrR2(y="int2", x="int1", default=0), 0),
(RegrSlope(y="int2", x="int1", default=0), 0),
(RegrSXX(y="int2", x="int1", default=0), 0),
(RegrSXY(y="int2", x="int1", default=0), 0),
(RegrSYY(y="int2", x="int1", default=0), 0),
]
for aggregation, expected_result in tests:
with self.subTest(aggregation=aggregation):
# Empty result with non-execution optimization.
with self.assertNumQueries(0):
values = StatTestModel.objects.none().aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": expected_result})
# Empty result when query must be executed.
with self.assertNumQueries(1):
values = StatTestModel.objects.aggregate(
aggregation=aggregation,
)
self.assertEqual(values, {"aggregation": expected_result})
def test_corr_general(self):
values = StatTestModel.objects.aggregate(corr=Corr(y="int2", x="int1"))
self.assertEqual(values, {"corr": -1.0})
def test_covar_pop_general(self):
values = StatTestModel.objects.aggregate(covarpop=CovarPop(y="int2", x="int1"))
self.assertEqual(values, {"covarpop": Approximate(-0.66, places=1)})
def test_covar_pop_sample(self):
values = StatTestModel.objects.aggregate(
covarpop=CovarPop(y="int2", x="int1", sample=True)
)
self.assertEqual(values, {"covarpop": -1.0})
def test_regr_avgx_general(self):
values = StatTestModel.objects.aggregate(regravgx=RegrAvgX(y="int2", x="int1"))
self.assertEqual(values, {"regravgx": 2.0})
def test_regr_avgy_general(self):
values = StatTestModel.objects.aggregate(regravgy=RegrAvgY(y="int2", x="int1"))
self.assertEqual(values, {"regravgy": 2.0})
def test_regr_count_general(self):
values = StatTestModel.objects.aggregate(
regrcount=RegrCount(y="int2", x="int1")
)
self.assertEqual(values, {"regrcount": 3})
def test_regr_count_default(self):
msg = "RegrCount does not allow default."
with self.assertRaisesMessage(TypeError, msg):
RegrCount(y="int2", x="int1", default=0)
def test_regr_intercept_general(self):
values = StatTestModel.objects.aggregate(
regrintercept=RegrIntercept(y="int2", x="int1")
)
self.assertEqual(values, {"regrintercept": 4})
def test_regr_r2_general(self):
values = StatTestModel.objects.aggregate(regrr2=RegrR2(y="int2", x="int1"))
self.assertEqual(values, {"regrr2": 1})
def test_regr_slope_general(self):
values = StatTestModel.objects.aggregate(
regrslope=RegrSlope(y="int2", x="int1")
)
self.assertEqual(values, {"regrslope": -1})
def test_regr_sxx_general(self):
values = StatTestModel.objects.aggregate(regrsxx=RegrSXX(y="int2", x="int1"))
self.assertEqual(values, {"regrsxx": 2.0})
def test_regr_sxy_general(self):
values = StatTestModel.objects.aggregate(regrsxy=RegrSXY(y="int2", x="int1"))
self.assertEqual(values, {"regrsxy": -2.0})
def test_regr_syy_general(self):
values = StatTestModel.objects.aggregate(regrsyy=RegrSYY(y="int2", x="int1"))
self.assertEqual(values, {"regrsyy": 2.0})
def test_regr_avgx_with_related_obj_and_number_as_argument(self):
"""
This is more complex test to check if JOIN on field and
number as argument works as expected.
"""
values = StatTestModel.objects.aggregate(
complex_regravgx=RegrAvgX(y=5, x="related_field__integer_field")
)
self.assertEqual(values, {"complex_regravgx": 1.0})