import json from django.db.models import CharField from django.db.models.expressions import F, OuterRef, Subquery, Value from django.db.models.functions import Cast, Concat, Substr from django.test.utils import Approximate from . import PostgreSQLTestCase from .models import AggregateTestModel, StatTestModel try: from django.contrib.postgres.aggregates import ( ArrayAgg, BitAnd, BitOr, BoolAnd, BoolOr, Corr, CovarPop, JSONBAgg, RegrAvgX, RegrAvgY, RegrCount, RegrIntercept, RegrR2, RegrSlope, RegrSXX, RegrSXY, RegrSYY, StatAggregate, StringAgg, ) except ImportError: pass # psycopg2 is not installed class TestGeneralAggregate(PostgreSQLTestCase): @classmethod def setUpTestData(cls): AggregateTestModel.objects.create(boolean_field=True, char_field='Foo1', integer_field=0) AggregateTestModel.objects.create(boolean_field=False, char_field='Foo2', integer_field=1) AggregateTestModel.objects.create(boolean_field=False, char_field='Foo4', integer_field=2) AggregateTestModel.objects.create(boolean_field=True, char_field='Foo3', integer_field=0) 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_empty_result(self): AggregateTestModel.objects.all().delete() values = AggregateTestModel.objects.aggregate(arrayagg=ArrayAgg('char_field')) self.assertEqual(values, {'arrayagg': []}) values = AggregateTestModel.objects.aggregate(arrayagg=ArrayAgg('integer_field')) self.assertEqual(values, {'arrayagg': []}) values = AggregateTestModel.objects.aggregate(arrayagg=ArrayAgg('boolean_field')) self.assertEqual(values, {'arrayagg': []}) 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_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_and_empty_result(self): AggregateTestModel.objects.all().delete() values = AggregateTestModel.objects.aggregate(bitand=BitAnd('integer_field')) self.assertEqual(values, {'bitand': None}) 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}) def test_bit_or_empty_result(self): AggregateTestModel.objects.all().delete() values = AggregateTestModel.objects.aggregate(bitor=BitOr('integer_field')) self.assertEqual(values, {'bitor': None}) def test_bool_and_general(self): values = AggregateTestModel.objects.aggregate(booland=BoolAnd('boolean_field')) self.assertEqual(values, {'booland': False}) def test_bool_and_empty_result(self): AggregateTestModel.objects.all().delete() values = AggregateTestModel.objects.aggregate(booland=BoolAnd('boolean_field')) self.assertEqual(values, {'booland': None}) def test_bool_or_general(self): values = AggregateTestModel.objects.aggregate(boolor=BoolOr('boolean_field')) self.assertEqual(values, {'boolor': True}) def test_bool_or_empty_result(self): AggregateTestModel.objects.all().delete() values = AggregateTestModel.objects.aggregate(boolor=BoolOr('boolean_field')) self.assertEqual(values, {'boolor': None}) def test_string_agg_requires_delimiter(self): with self.assertRaises(TypeError): AggregateTestModel.objects.aggregate(stringagg=StringAgg('char_field')) 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_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_empty_result(self): AggregateTestModel.objects.all().delete() values = AggregateTestModel.objects.aggregate(stringagg=StringAgg('char_field', delimiter=';')) self.assertEqual(values, {'stringagg': ''}) 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_json_agg(self): values = AggregateTestModel.objects.aggregate(jsonagg=JSONBAgg('char_field')) self.assertEqual(values, {'jsonagg': ['Foo1', 'Foo2', 'Foo4', 'Foo3']}) def test_json_agg_empty(self): values = AggregateTestModel.objects.none().aggregate(jsonagg=JSONBAgg('integer_field')) self.assertEqual(values, json.loads('{"jsonagg": []}')) 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) 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']) 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_corr_general(self): values = StatTestModel.objects.aggregate(corr=Corr(y='int2', x='int1')) self.assertEqual(values, {'corr': -1.0}) def test_corr_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(corr=Corr(y='int2', x='int1')) self.assertEqual(values, {'corr': None}) 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_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(covarpop=CovarPop(y='int2', x='int1')) self.assertEqual(values, {'covarpop': None}) 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_covar_pop_sample_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(covarpop=CovarPop(y='int2', x='int1', sample=True)) self.assertEqual(values, {'covarpop': None}) 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_avgx_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regravgx=RegrAvgX(y='int2', x='int1')) self.assertEqual(values, {'regravgx': None}) 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_avgy_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regravgy=RegrAvgY(y='int2', x='int1')) self.assertEqual(values, {'regravgy': None}) 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_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrcount=RegrCount(y='int2', x='int1')) self.assertEqual(values, {'regrcount': 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_intercept_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrintercept=RegrIntercept(y='int2', x='int1')) self.assertEqual(values, {'regrintercept': None}) def test_regr_r2_general(self): values = StatTestModel.objects.aggregate(regrr2=RegrR2(y='int2', x='int1')) self.assertEqual(values, {'regrr2': 1}) def test_regr_r2_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrr2=RegrR2(y='int2', x='int1')) self.assertEqual(values, {'regrr2': None}) def test_regr_slope_general(self): values = StatTestModel.objects.aggregate(regrslope=RegrSlope(y='int2', x='int1')) self.assertEqual(values, {'regrslope': -1}) def test_regr_slope_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrslope=RegrSlope(y='int2', x='int1')) self.assertEqual(values, {'regrslope': None}) 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_sxx_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrsxx=RegrSXX(y='int2', x='int1')) self.assertEqual(values, {'regrsxx': None}) 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_sxy_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrsxy=RegrSXY(y='int2', x='int1')) self.assertEqual(values, {'regrsxy': None}) 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_syy_empty_result(self): StatTestModel.objects.all().delete() values = StatTestModel.objects.aggregate(regrsyy=RegrSYY(y='int2', x='int1')) self.assertEqual(values, {'regrsyy': None}) 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})