1337 lines
50 KiB
Python
1337 lines
50 KiB
Python
import unittest
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from datetime import date, datetime, time, timedelta
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from decimal import Decimal
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from operator import attrgetter, itemgetter
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from uuid import UUID
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from django.core.exceptions import FieldError
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from django.db import connection
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from django.db.models import (
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BinaryField, BooleanField, Case, Count, DecimalField, F,
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GenericIPAddressField, IntegerField, Max, Min, Q, Sum, TextField, Value,
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When,
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)
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from django.test import SimpleTestCase, TestCase
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from .models import CaseTestModel, Client, FKCaseTestModel, O2OCaseTestModel
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try:
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from PIL import Image
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except ImportError:
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Image = None
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class CaseExpressionTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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o = CaseTestModel.objects.create(integer=1, integer2=1, string='1')
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O2OCaseTestModel.objects.create(o2o=o, integer=1)
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FKCaseTestModel.objects.create(fk=o, integer=1)
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o = CaseTestModel.objects.create(integer=2, integer2=3, string='2')
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O2OCaseTestModel.objects.create(o2o=o, integer=2)
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FKCaseTestModel.objects.create(fk=o, integer=2)
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FKCaseTestModel.objects.create(fk=o, integer=3)
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o = CaseTestModel.objects.create(integer=3, integer2=4, string='3')
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O2OCaseTestModel.objects.create(o2o=o, integer=3)
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FKCaseTestModel.objects.create(fk=o, integer=3)
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FKCaseTestModel.objects.create(fk=o, integer=4)
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o = CaseTestModel.objects.create(integer=2, integer2=2, string='2')
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O2OCaseTestModel.objects.create(o2o=o, integer=2)
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FKCaseTestModel.objects.create(fk=o, integer=2)
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FKCaseTestModel.objects.create(fk=o, integer=3)
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o = CaseTestModel.objects.create(integer=3, integer2=4, string='3')
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O2OCaseTestModel.objects.create(o2o=o, integer=3)
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FKCaseTestModel.objects.create(fk=o, integer=3)
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FKCaseTestModel.objects.create(fk=o, integer=4)
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o = CaseTestModel.objects.create(integer=3, integer2=3, string='3')
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O2OCaseTestModel.objects.create(o2o=o, integer=3)
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FKCaseTestModel.objects.create(fk=o, integer=3)
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FKCaseTestModel.objects.create(fk=o, integer=4)
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o = CaseTestModel.objects.create(integer=4, integer2=5, string='4')
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O2OCaseTestModel.objects.create(o2o=o, integer=1)
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FKCaseTestModel.objects.create(fk=o, integer=5)
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cls.group_by_fields = [
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f.name for f in CaseTestModel._meta.get_fields()
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if not (f.is_relation and f.auto_created) and
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(
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connection.features.allows_group_by_lob or
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not isinstance(f, (BinaryField, TextField))
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)
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]
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def test_annotate(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(test=Case(
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When(integer=1, then=Value('one')),
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When(integer=2, then=Value('two')),
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default=Value('other'),
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)).order_by('pk'),
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[(1, 'one'), (2, 'two'), (3, 'other'), (2, 'two'), (3, 'other'), (3, 'other'), (4, 'other')],
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transform=attrgetter('integer', 'test')
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)
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def test_annotate_without_default(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(test=Case(
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When(integer=1, then=1),
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When(integer=2, then=2),
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)).order_by('pk'),
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[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
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transform=attrgetter('integer', 'test')
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)
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def test_annotate_with_expression_as_value(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(f_test=Case(
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When(integer=1, then=F('integer') + 1),
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When(integer=2, then=F('integer') + 3),
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default='integer',
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)).order_by('pk'),
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[(1, 2), (2, 5), (3, 3), (2, 5), (3, 3), (3, 3), (4, 4)],
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transform=attrgetter('integer', 'f_test')
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)
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def test_annotate_with_expression_as_condition(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(f_test=Case(
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When(integer2=F('integer'), then=Value('equal')),
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When(integer2=F('integer') + 1, then=Value('+1')),
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)).order_by('pk'),
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[(1, 'equal'), (2, '+1'), (3, '+1'), (2, 'equal'), (3, '+1'), (3, 'equal'), (4, '+1')],
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transform=attrgetter('integer', 'f_test')
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)
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def test_annotate_with_join_in_value(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(join_test=Case(
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When(integer=1, then=F('o2o_rel__integer') + 1),
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When(integer=2, then=F('o2o_rel__integer') + 3),
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default='o2o_rel__integer',
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)).order_by('pk'),
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[(1, 2), (2, 5), (3, 3), (2, 5), (3, 3), (3, 3), (4, 1)],
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transform=attrgetter('integer', 'join_test')
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)
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def test_annotate_with_in_clause(self):
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fk_rels = FKCaseTestModel.objects.filter(integer__in=[5])
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self.assertQuerysetEqual(
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CaseTestModel.objects.only('pk', 'integer').annotate(in_test=Sum(Case(
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When(fk_rel__in=fk_rels, then=F('fk_rel__integer')),
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default=Value(0),
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))).order_by('pk'),
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[(1, 0), (2, 0), (3, 0), (2, 0), (3, 0), (3, 0), (4, 5)],
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transform=attrgetter('integer', 'in_test')
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)
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def test_annotate_with_join_in_condition(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(join_test=Case(
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When(integer2=F('o2o_rel__integer'), then=Value('equal')),
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When(integer2=F('o2o_rel__integer') + 1, then=Value('+1')),
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default=Value('other'),
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)).order_by('pk'),
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[(1, 'equal'), (2, '+1'), (3, '+1'), (2, 'equal'), (3, '+1'), (3, 'equal'), (4, 'other')],
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transform=attrgetter('integer', 'join_test')
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)
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def test_annotate_with_join_in_predicate(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(join_test=Case(
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When(o2o_rel__integer=1, then=Value('one')),
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When(o2o_rel__integer=2, then=Value('two')),
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When(o2o_rel__integer=3, then=Value('three')),
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default=Value('other'),
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)).order_by('pk'),
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[(1, 'one'), (2, 'two'), (3, 'three'), (2, 'two'), (3, 'three'), (3, 'three'), (4, 'one')],
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transform=attrgetter('integer', 'join_test')
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)
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def test_annotate_with_annotation_in_value(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(
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f_plus_1=F('integer') + 1,
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f_plus_3=F('integer') + 3,
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).annotate(
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f_test=Case(
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When(integer=1, then='f_plus_1'),
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When(integer=2, then='f_plus_3'),
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default='integer',
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),
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).order_by('pk'),
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[(1, 2), (2, 5), (3, 3), (2, 5), (3, 3), (3, 3), (4, 4)],
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transform=attrgetter('integer', 'f_test')
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)
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def test_annotate_with_annotation_in_condition(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(
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f_plus_1=F('integer') + 1,
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).annotate(
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f_test=Case(
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When(integer2=F('integer'), then=Value('equal')),
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When(integer2=F('f_plus_1'), then=Value('+1')),
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),
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).order_by('pk'),
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[(1, 'equal'), (2, '+1'), (3, '+1'), (2, 'equal'), (3, '+1'), (3, 'equal'), (4, '+1')],
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transform=attrgetter('integer', 'f_test')
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)
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def test_annotate_with_annotation_in_predicate(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(
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f_minus_2=F('integer') - 2,
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).annotate(
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test=Case(
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When(f_minus_2=-1, then=Value('negative one')),
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When(f_minus_2=0, then=Value('zero')),
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When(f_minus_2=1, then=Value('one')),
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default=Value('other'),
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),
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).order_by('pk'),
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[(1, 'negative one'), (2, 'zero'), (3, 'one'), (2, 'zero'), (3, 'one'), (3, 'one'), (4, 'other')],
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transform=attrgetter('integer', 'test')
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)
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def test_annotate_with_aggregation_in_value(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.values(*self.group_by_fields).annotate(
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min=Min('fk_rel__integer'),
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max=Max('fk_rel__integer'),
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).annotate(
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test=Case(
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When(integer=2, then='min'),
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When(integer=3, then='max'),
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),
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).order_by('pk'),
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[(1, None, 1, 1), (2, 2, 2, 3), (3, 4, 3, 4), (2, 2, 2, 3), (3, 4, 3, 4), (3, 4, 3, 4), (4, None, 5, 5)],
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transform=itemgetter('integer', 'test', 'min', 'max')
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)
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def test_annotate_with_aggregation_in_condition(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.values(*self.group_by_fields).annotate(
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min=Min('fk_rel__integer'),
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max=Max('fk_rel__integer'),
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).annotate(
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test=Case(
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When(integer2=F('min'), then=Value('min')),
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When(integer2=F('max'), then=Value('max')),
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),
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).order_by('pk'),
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[(1, 1, 'min'), (2, 3, 'max'), (3, 4, 'max'), (2, 2, 'min'), (3, 4, 'max'), (3, 3, 'min'), (4, 5, 'min')],
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transform=itemgetter('integer', 'integer2', 'test')
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)
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def test_annotate_with_aggregation_in_predicate(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.values(*self.group_by_fields).annotate(
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max=Max('fk_rel__integer'),
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).annotate(
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test=Case(
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When(max=3, then=Value('max = 3')),
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When(max=4, then=Value('max = 4')),
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default=Value(''),
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),
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).order_by('pk'),
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[(1, 1, ''), (2, 3, 'max = 3'), (3, 4, 'max = 4'), (2, 3, 'max = 3'),
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(3, 4, 'max = 4'), (3, 4, 'max = 4'), (4, 5, '')],
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transform=itemgetter('integer', 'max', 'test')
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)
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def test_annotate_exclude(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(test=Case(
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When(integer=1, then=Value('one')),
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When(integer=2, then=Value('two')),
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default=Value('other'),
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)).exclude(test='other').order_by('pk'),
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[(1, 'one'), (2, 'two'), (2, 'two')],
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transform=attrgetter('integer', 'test')
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)
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def test_annotate_filter_decimal(self):
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obj = CaseTestModel.objects.create(integer=0, decimal=Decimal('1'))
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qs = CaseTestModel.objects.annotate(
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x=Case(When(integer=0, then=F('decimal'))),
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y=Case(When(integer=0, then=Value(Decimal('1')))),
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)
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self.assertSequenceEqual(qs.filter(Q(x=1) & Q(x=Decimal('1'))), [obj])
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self.assertSequenceEqual(qs.filter(Q(y=1) & Q(y=Decimal('1'))), [obj])
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def test_annotate_values_not_in_order_by(self):
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self.assertEqual(
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list(CaseTestModel.objects.annotate(test=Case(
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When(integer=1, then=Value('one')),
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When(integer=2, then=Value('two')),
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When(integer=3, then=Value('three')),
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default=Value('other'),
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)).order_by('test').values_list('integer', flat=True)),
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[1, 4, 3, 3, 3, 2, 2]
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)
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def test_annotate_with_empty_when(self):
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objects = CaseTestModel.objects.annotate(
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selected=Case(
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When(pk__in=[], then=Value('selected')),
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default=Value('not selected'),
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)
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)
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self.assertEqual(len(objects), CaseTestModel.objects.count())
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self.assertTrue(all(obj.selected == 'not selected' for obj in objects))
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def test_combined_expression(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(
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test=Case(
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When(integer=1, then=2),
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When(integer=2, then=1),
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default=3,
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) + 1,
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).order_by('pk'),
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[(1, 3), (2, 2), (3, 4), (2, 2), (3, 4), (3, 4), (4, 4)],
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transform=attrgetter('integer', 'test')
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)
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def test_in_subquery(self):
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self.assertQuerysetEqual(
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CaseTestModel.objects.filter(
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pk__in=CaseTestModel.objects.annotate(
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test=Case(
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When(integer=F('integer2'), then='pk'),
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When(integer=4, then='pk'),
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),
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).values('test')).order_by('pk'),
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[(1, 1), (2, 2), (3, 3), (4, 5)],
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transform=attrgetter('integer', 'integer2')
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)
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def test_condition_with_lookups(self):
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qs = CaseTestModel.objects.annotate(
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test=Case(
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When(Q(integer2=1), string='2', then=Value(False)),
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When(Q(integer2=1), string='1', then=Value(True)),
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default=Value(False),
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output_field=BooleanField(),
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),
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)
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self.assertIs(qs.get(integer=1).test, True)
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|
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def test_case_reuse(self):
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SOME_CASE = Case(
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When(pk=0, then=Value('0')),
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default=Value('1'),
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)
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self.assertQuerysetEqual(
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CaseTestModel.objects.annotate(somecase=SOME_CASE).order_by('pk'),
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CaseTestModel.objects.annotate(somecase=SOME_CASE).order_by('pk').values_list('pk', 'somecase'),
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lambda x: (x.pk, x.somecase)
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)
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def test_aggregate(self):
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self.assertEqual(
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CaseTestModel.objects.aggregate(
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one=Sum(Case(
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When(integer=1, then=1),
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)),
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two=Sum(Case(
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When(integer=2, then=1),
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)),
|
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three=Sum(Case(
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When(integer=3, then=1),
|
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)),
|
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four=Sum(Case(
|
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When(integer=4, then=1),
|
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)),
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),
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{'one': 1, 'two': 2, 'three': 3, 'four': 1}
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)
|
|
|
|
def test_aggregate_with_expression_as_value(self):
|
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self.assertEqual(
|
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CaseTestModel.objects.aggregate(
|
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one=Sum(Case(When(integer=1, then='integer'))),
|
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two=Sum(Case(When(integer=2, then=F('integer') - 1))),
|
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three=Sum(Case(When(integer=3, then=F('integer') + 1))),
|
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),
|
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{'one': 1, 'two': 2, 'three': 12}
|
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)
|
|
|
|
def test_aggregate_with_expression_as_condition(self):
|
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self.assertEqual(
|
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CaseTestModel.objects.aggregate(
|
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equal=Sum(Case(
|
|
When(integer2=F('integer'), then=1),
|
|
)),
|
|
plus_one=Sum(Case(
|
|
When(integer2=F('integer') + 1, then=1),
|
|
)),
|
|
),
|
|
{'equal': 3, 'plus_one': 4}
|
|
)
|
|
|
|
def test_filter(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer2=Case(
|
|
When(integer=2, then=3),
|
|
When(integer=3, then=4),
|
|
default=1,
|
|
)).order_by('pk'),
|
|
[(1, 1), (2, 3), (3, 4), (3, 4)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_without_default(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer2=Case(
|
|
When(integer=2, then=3),
|
|
When(integer=3, then=4),
|
|
)).order_by('pk'),
|
|
[(2, 3), (3, 4), (3, 4)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_expression_as_value(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer2=Case(
|
|
When(integer=2, then=F('integer') + 1),
|
|
When(integer=3, then=F('integer')),
|
|
default='integer',
|
|
)).order_by('pk'),
|
|
[(1, 1), (2, 3), (3, 3)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_expression_as_condition(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(string=Case(
|
|
When(integer2=F('integer'), then=Value('2')),
|
|
When(integer2=F('integer') + 1, then=Value('3')),
|
|
)).order_by('pk'),
|
|
[(3, 4, '3'), (2, 2, '2'), (3, 4, '3')],
|
|
transform=attrgetter('integer', 'integer2', 'string')
|
|
)
|
|
|
|
def test_filter_with_join_in_value(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer2=Case(
|
|
When(integer=2, then=F('o2o_rel__integer') + 1),
|
|
When(integer=3, then=F('o2o_rel__integer')),
|
|
default='o2o_rel__integer',
|
|
)).order_by('pk'),
|
|
[(1, 1), (2, 3), (3, 3)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_join_in_condition(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer=Case(
|
|
When(integer2=F('o2o_rel__integer') + 1, then=2),
|
|
When(integer2=F('o2o_rel__integer'), then=3),
|
|
)).order_by('pk'),
|
|
[(2, 3), (3, 3)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_join_in_predicate(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer2=Case(
|
|
When(o2o_rel__integer=1, then=1),
|
|
When(o2o_rel__integer=2, then=3),
|
|
When(o2o_rel__integer=3, then=4),
|
|
)).order_by('pk'),
|
|
[(1, 1), (2, 3), (3, 4), (3, 4)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_annotation_in_value(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.annotate(
|
|
f=F('integer'),
|
|
f_plus_1=F('integer') + 1,
|
|
).filter(
|
|
integer2=Case(
|
|
When(integer=2, then='f_plus_1'),
|
|
When(integer=3, then='f'),
|
|
),
|
|
).order_by('pk'),
|
|
[(2, 3), (3, 3)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_annotation_in_condition(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.annotate(
|
|
f_plus_1=F('integer') + 1,
|
|
).filter(
|
|
integer=Case(
|
|
When(integer2=F('integer'), then=2),
|
|
When(integer2=F('f_plus_1'), then=3),
|
|
),
|
|
).order_by('pk'),
|
|
[(3, 4), (2, 2), (3, 4)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_annotation_in_predicate(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.annotate(
|
|
f_plus_1=F('integer') + 1,
|
|
).filter(
|
|
integer2=Case(
|
|
When(f_plus_1=3, then=3),
|
|
When(f_plus_1=4, then=4),
|
|
default=1,
|
|
),
|
|
).order_by('pk'),
|
|
[(1, 1), (2, 3), (3, 4), (3, 4)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_filter_with_aggregation_in_value(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.values(*self.group_by_fields).annotate(
|
|
min=Min('fk_rel__integer'),
|
|
max=Max('fk_rel__integer'),
|
|
).filter(
|
|
integer2=Case(
|
|
When(integer=2, then='min'),
|
|
When(integer=3, then='max'),
|
|
),
|
|
).order_by('pk'),
|
|
[(3, 4, 3, 4), (2, 2, 2, 3), (3, 4, 3, 4)],
|
|
transform=itemgetter('integer', 'integer2', 'min', 'max')
|
|
)
|
|
|
|
def test_filter_with_aggregation_in_condition(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.values(*self.group_by_fields).annotate(
|
|
min=Min('fk_rel__integer'),
|
|
max=Max('fk_rel__integer'),
|
|
).filter(
|
|
integer=Case(
|
|
When(integer2=F('min'), then=2),
|
|
When(integer2=F('max'), then=3),
|
|
),
|
|
).order_by('pk'),
|
|
[(3, 4, 3, 4), (2, 2, 2, 3), (3, 4, 3, 4)],
|
|
transform=itemgetter('integer', 'integer2', 'min', 'max')
|
|
)
|
|
|
|
def test_filter_with_aggregation_in_predicate(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.values(*self.group_by_fields).annotate(
|
|
max=Max('fk_rel__integer'),
|
|
).filter(
|
|
integer=Case(
|
|
When(max=3, then=2),
|
|
When(max=4, then=3),
|
|
),
|
|
).order_by('pk'),
|
|
[(2, 3, 3), (3, 4, 4), (2, 2, 3), (3, 4, 4), (3, 3, 4)],
|
|
transform=itemgetter('integer', 'integer2', 'max')
|
|
)
|
|
|
|
def test_update(self):
|
|
CaseTestModel.objects.update(
|
|
string=Case(
|
|
When(integer=1, then=Value('one')),
|
|
When(integer=2, then=Value('two')),
|
|
default=Value('other'),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 'one'), (2, 'two'), (3, 'other'), (2, 'two'), (3, 'other'), (3, 'other'), (4, 'other')],
|
|
transform=attrgetter('integer', 'string')
|
|
)
|
|
|
|
def test_update_without_default(self):
|
|
CaseTestModel.objects.update(
|
|
integer2=Case(
|
|
When(integer=1, then=1),
|
|
When(integer=2, then=2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'integer2')
|
|
)
|
|
|
|
def test_update_with_expression_as_value(self):
|
|
CaseTestModel.objects.update(
|
|
integer=Case(
|
|
When(integer=1, then=F('integer') + 1),
|
|
When(integer=2, then=F('integer') + 3),
|
|
default='integer',
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[('1', 2), ('2', 5), ('3', 3), ('2', 5), ('3', 3), ('3', 3), ('4', 4)],
|
|
transform=attrgetter('string', 'integer')
|
|
)
|
|
|
|
def test_update_with_expression_as_condition(self):
|
|
CaseTestModel.objects.update(
|
|
string=Case(
|
|
When(integer2=F('integer'), then=Value('equal')),
|
|
When(integer2=F('integer') + 1, then=Value('+1')),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 'equal'), (2, '+1'), (3, '+1'), (2, 'equal'), (3, '+1'), (3, 'equal'), (4, '+1')],
|
|
transform=attrgetter('integer', 'string')
|
|
)
|
|
|
|
def test_update_with_join_in_condition_raise_field_error(self):
|
|
with self.assertRaisesMessage(FieldError, 'Joined field references are not permitted in this query'):
|
|
CaseTestModel.objects.update(
|
|
integer=Case(
|
|
When(integer2=F('o2o_rel__integer') + 1, then=2),
|
|
When(integer2=F('o2o_rel__integer'), then=3),
|
|
),
|
|
)
|
|
|
|
def test_update_with_join_in_predicate_raise_field_error(self):
|
|
with self.assertRaisesMessage(FieldError, 'Joined field references are not permitted in this query'):
|
|
CaseTestModel.objects.update(
|
|
string=Case(
|
|
When(o2o_rel__integer=1, then=Value('one')),
|
|
When(o2o_rel__integer=2, then=Value('two')),
|
|
When(o2o_rel__integer=3, then=Value('three')),
|
|
default=Value('other'),
|
|
),
|
|
)
|
|
|
|
def test_update_big_integer(self):
|
|
CaseTestModel.objects.update(
|
|
big_integer=Case(
|
|
When(integer=1, then=1),
|
|
When(integer=2, then=2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'big_integer')
|
|
)
|
|
|
|
def test_update_binary(self):
|
|
CaseTestModel.objects.update(
|
|
binary=Case(
|
|
When(integer=1, then=b'one'),
|
|
When(integer=2, then=b'two'),
|
|
default=b'',
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, b'one'), (2, b'two'), (3, b''), (2, b'two'), (3, b''), (3, b''), (4, b'')],
|
|
transform=lambda o: (o.integer, bytes(o.binary))
|
|
)
|
|
|
|
def test_update_boolean(self):
|
|
CaseTestModel.objects.update(
|
|
boolean=Case(
|
|
When(integer=1, then=True),
|
|
When(integer=2, then=True),
|
|
default=False,
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, True), (2, True), (3, False), (2, True), (3, False), (3, False), (4, False)],
|
|
transform=attrgetter('integer', 'boolean')
|
|
)
|
|
|
|
def test_update_date(self):
|
|
CaseTestModel.objects.update(
|
|
date=Case(
|
|
When(integer=1, then=date(2015, 1, 1)),
|
|
When(integer=2, then=date(2015, 1, 2)),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[
|
|
(1, date(2015, 1, 1)), (2, date(2015, 1, 2)), (3, None), (2, date(2015, 1, 2)),
|
|
(3, None), (3, None), (4, None)
|
|
],
|
|
transform=attrgetter('integer', 'date')
|
|
)
|
|
|
|
def test_update_date_time(self):
|
|
CaseTestModel.objects.update(
|
|
date_time=Case(
|
|
When(integer=1, then=datetime(2015, 1, 1)),
|
|
When(integer=2, then=datetime(2015, 1, 2)),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[
|
|
(1, datetime(2015, 1, 1)), (2, datetime(2015, 1, 2)), (3, None), (2, datetime(2015, 1, 2)),
|
|
(3, None), (3, None), (4, None)
|
|
],
|
|
transform=attrgetter('integer', 'date_time')
|
|
)
|
|
|
|
def test_update_decimal(self):
|
|
CaseTestModel.objects.update(
|
|
decimal=Case(
|
|
When(integer=1, then=Decimal('1.1')),
|
|
When(integer=2, then=Value(Decimal('2.2'), output_field=DecimalField())),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[
|
|
(1, Decimal('1.1')),
|
|
(2, Decimal('2.2')),
|
|
(3, None),
|
|
(2, Decimal('2.2')),
|
|
(3, None),
|
|
(3, None),
|
|
(4, None)
|
|
],
|
|
transform=attrgetter('integer', 'decimal')
|
|
)
|
|
|
|
def test_update_duration(self):
|
|
CaseTestModel.objects.update(
|
|
duration=Case(
|
|
When(integer=1, then=timedelta(1)),
|
|
When(integer=2, then=timedelta(2)),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, timedelta(1)), (2, timedelta(2)), (3, None), (2, timedelta(2)), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'duration')
|
|
)
|
|
|
|
def test_update_email(self):
|
|
CaseTestModel.objects.update(
|
|
email=Case(
|
|
When(integer=1, then=Value('1@example.com')),
|
|
When(integer=2, then=Value('2@example.com')),
|
|
default=Value(''),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '1@example.com'), (2, '2@example.com'), (3, ''), (2, '2@example.com'), (3, ''), (3, ''), (4, '')],
|
|
transform=attrgetter('integer', 'email')
|
|
)
|
|
|
|
def test_update_file(self):
|
|
CaseTestModel.objects.update(
|
|
file=Case(
|
|
When(integer=1, then=Value('~/1')),
|
|
When(integer=2, then=Value('~/2')),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '~/1'), (2, '~/2'), (3, ''), (2, '~/2'), (3, ''), (3, ''), (4, '')],
|
|
transform=lambda o: (o.integer, str(o.file))
|
|
)
|
|
|
|
def test_update_file_path(self):
|
|
CaseTestModel.objects.update(
|
|
file_path=Case(
|
|
When(integer=1, then=Value('~/1')),
|
|
When(integer=2, then=Value('~/2')),
|
|
default=Value(''),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '~/1'), (2, '~/2'), (3, ''), (2, '~/2'), (3, ''), (3, ''), (4, '')],
|
|
transform=attrgetter('integer', 'file_path')
|
|
)
|
|
|
|
def test_update_float(self):
|
|
CaseTestModel.objects.update(
|
|
float=Case(
|
|
When(integer=1, then=1.1),
|
|
When(integer=2, then=2.2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1.1), (2, 2.2), (3, None), (2, 2.2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'float')
|
|
)
|
|
|
|
@unittest.skipUnless(Image, "Pillow not installed")
|
|
def test_update_image(self):
|
|
CaseTestModel.objects.update(
|
|
image=Case(
|
|
When(integer=1, then=Value('~/1')),
|
|
When(integer=2, then=Value('~/2')),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '~/1'), (2, '~/2'), (3, ''), (2, '~/2'), (3, ''), (3, ''), (4, '')],
|
|
transform=lambda o: (o.integer, str(o.image))
|
|
)
|
|
|
|
def test_update_generic_ip_address(self):
|
|
CaseTestModel.objects.update(
|
|
generic_ip_address=Case(
|
|
When(integer=1, then=Value('1.1.1.1')),
|
|
When(integer=2, then=Value('2.2.2.2')),
|
|
output_field=GenericIPAddressField(),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '1.1.1.1'), (2, '2.2.2.2'), (3, None), (2, '2.2.2.2'), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'generic_ip_address')
|
|
)
|
|
|
|
def test_update_null_boolean(self):
|
|
CaseTestModel.objects.update(
|
|
null_boolean=Case(
|
|
When(integer=1, then=True),
|
|
When(integer=2, then=False),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, True), (2, False), (3, None), (2, False), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'null_boolean')
|
|
)
|
|
|
|
def test_update_positive_big_integer(self):
|
|
CaseTestModel.objects.update(
|
|
positive_big_integer=Case(
|
|
When(integer=1, then=1),
|
|
When(integer=2, then=2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'positive_big_integer')
|
|
)
|
|
|
|
def test_update_positive_integer(self):
|
|
CaseTestModel.objects.update(
|
|
positive_integer=Case(
|
|
When(integer=1, then=1),
|
|
When(integer=2, then=2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'positive_integer')
|
|
)
|
|
|
|
def test_update_positive_small_integer(self):
|
|
CaseTestModel.objects.update(
|
|
positive_small_integer=Case(
|
|
When(integer=1, then=1),
|
|
When(integer=2, then=2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'positive_small_integer')
|
|
)
|
|
|
|
def test_update_slug(self):
|
|
CaseTestModel.objects.update(
|
|
slug=Case(
|
|
When(integer=1, then=Value('1')),
|
|
When(integer=2, then=Value('2')),
|
|
default=Value(''),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '1'), (2, '2'), (3, ''), (2, '2'), (3, ''), (3, ''), (4, '')],
|
|
transform=attrgetter('integer', 'slug')
|
|
)
|
|
|
|
def test_update_small_integer(self):
|
|
CaseTestModel.objects.update(
|
|
small_integer=Case(
|
|
When(integer=1, then=1),
|
|
When(integer=2, then=2),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, 1), (2, 2), (3, None), (2, 2), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'small_integer')
|
|
)
|
|
|
|
def test_update_string(self):
|
|
CaseTestModel.objects.filter(string__in=['1', '2']).update(
|
|
string=Case(
|
|
When(integer=1, then=Value('1')),
|
|
When(integer=2, then=Value('2')),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(string__in=['1', '2']).order_by('pk'),
|
|
[(1, '1'), (2, '2'), (2, '2')],
|
|
transform=attrgetter('integer', 'string')
|
|
)
|
|
|
|
def test_update_text(self):
|
|
CaseTestModel.objects.update(
|
|
text=Case(
|
|
When(integer=1, then=Value('1')),
|
|
When(integer=2, then=Value('2')),
|
|
default=Value(''),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, '1'), (2, '2'), (3, ''), (2, '2'), (3, ''), (3, ''), (4, '')],
|
|
transform=attrgetter('integer', 'text')
|
|
)
|
|
|
|
def test_update_time(self):
|
|
CaseTestModel.objects.update(
|
|
time=Case(
|
|
When(integer=1, then=time(1)),
|
|
When(integer=2, then=time(2)),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, time(1)), (2, time(2)), (3, None), (2, time(2)), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'time')
|
|
)
|
|
|
|
def test_update_url(self):
|
|
CaseTestModel.objects.update(
|
|
url=Case(
|
|
When(integer=1, then=Value('http://1.example.com/')),
|
|
When(integer=2, then=Value('http://2.example.com/')),
|
|
default=Value(''),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[
|
|
(1, 'http://1.example.com/'), (2, 'http://2.example.com/'), (3, ''), (2, 'http://2.example.com/'),
|
|
(3, ''), (3, ''), (4, '')
|
|
],
|
|
transform=attrgetter('integer', 'url')
|
|
)
|
|
|
|
def test_update_uuid(self):
|
|
CaseTestModel.objects.update(
|
|
uuid=Case(
|
|
When(integer=1, then=UUID('11111111111111111111111111111111')),
|
|
When(integer=2, then=UUID('22222222222222222222222222222222')),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[
|
|
(1, UUID('11111111111111111111111111111111')),
|
|
(2, UUID('22222222222222222222222222222222')),
|
|
(3, None),
|
|
(2, UUID('22222222222222222222222222222222')),
|
|
(3, None),
|
|
(3, None),
|
|
(4, None),
|
|
],
|
|
transform=attrgetter('integer', 'uuid')
|
|
)
|
|
|
|
def test_update_fk(self):
|
|
obj1, obj2 = CaseTestModel.objects.all()[:2]
|
|
|
|
CaseTestModel.objects.update(
|
|
fk=Case(
|
|
When(integer=1, then=obj1.pk),
|
|
When(integer=2, then=obj2.pk),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.all().order_by('pk'),
|
|
[(1, obj1.pk), (2, obj2.pk), (3, None), (2, obj2.pk), (3, None), (3, None), (4, None)],
|
|
transform=attrgetter('integer', 'fk_id')
|
|
)
|
|
|
|
def test_lookup_in_condition(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.annotate(
|
|
test=Case(
|
|
When(integer__lt=2, then=Value('less than 2')),
|
|
When(integer__gt=2, then=Value('greater than 2')),
|
|
default=Value('equal to 2'),
|
|
),
|
|
).order_by('pk'),
|
|
[
|
|
(1, 'less than 2'), (2, 'equal to 2'), (3, 'greater than 2'), (2, 'equal to 2'), (3, 'greater than 2'),
|
|
(3, 'greater than 2'), (4, 'greater than 2')
|
|
],
|
|
transform=attrgetter('integer', 'test')
|
|
)
|
|
|
|
def test_lookup_different_fields(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.annotate(
|
|
test=Case(
|
|
When(integer=2, integer2=3, then=Value('when')),
|
|
default=Value('default'),
|
|
),
|
|
).order_by('pk'),
|
|
[
|
|
(1, 1, 'default'), (2, 3, 'when'), (3, 4, 'default'), (2, 2, 'default'), (3, 4, 'default'),
|
|
(3, 3, 'default'), (4, 5, 'default')
|
|
],
|
|
transform=attrgetter('integer', 'integer2', 'test')
|
|
)
|
|
|
|
def test_combined_q_object(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.annotate(
|
|
test=Case(
|
|
When(Q(integer=2) | Q(integer2=3), then=Value('when')),
|
|
default=Value('default'),
|
|
),
|
|
).order_by('pk'),
|
|
[
|
|
(1, 1, 'default'), (2, 3, 'when'), (3, 4, 'default'), (2, 2, 'when'), (3, 4, 'default'),
|
|
(3, 3, 'when'), (4, 5, 'default')
|
|
],
|
|
transform=attrgetter('integer', 'integer2', 'test')
|
|
)
|
|
|
|
def test_order_by_conditional_implicit(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer__lte=2).annotate(test=Case(
|
|
When(integer=1, then=2),
|
|
When(integer=2, then=1),
|
|
default=3,
|
|
)).order_by('test', 'pk'),
|
|
[(2, 1), (2, 1), (1, 2)],
|
|
transform=attrgetter('integer', 'test')
|
|
)
|
|
|
|
def test_order_by_conditional_explicit(self):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(integer__lte=2).annotate(test=Case(
|
|
When(integer=1, then=2),
|
|
When(integer=2, then=1),
|
|
default=3,
|
|
)).order_by(F('test').asc(), 'pk'),
|
|
[(2, 1), (2, 1), (1, 2)],
|
|
transform=attrgetter('integer', 'test')
|
|
)
|
|
|
|
def test_join_promotion(self):
|
|
o = CaseTestModel.objects.create(integer=1, integer2=1, string='1')
|
|
# Testing that:
|
|
# 1. There isn't any object on the remote side of the fk_rel
|
|
# relation. If the query used inner joins, then the join to fk_rel
|
|
# would remove o from the results. So, in effect we are testing that
|
|
# we are promoting the fk_rel join to a left outer join here.
|
|
# 2. The default value of 3 is generated for the case expression.
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(pk=o.pk).annotate(
|
|
foo=Case(
|
|
When(fk_rel__pk=1, then=2),
|
|
default=3,
|
|
),
|
|
),
|
|
[(o, 3)],
|
|
lambda x: (x, x.foo)
|
|
)
|
|
# Now 2 should be generated, as the fk_rel is null.
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(pk=o.pk).annotate(
|
|
foo=Case(
|
|
When(fk_rel__isnull=True, then=2),
|
|
default=3,
|
|
),
|
|
),
|
|
[(o, 2)],
|
|
lambda x: (x, x.foo)
|
|
)
|
|
|
|
def test_join_promotion_multiple_annotations(self):
|
|
o = CaseTestModel.objects.create(integer=1, integer2=1, string='1')
|
|
# Testing that:
|
|
# 1. There isn't any object on the remote side of the fk_rel
|
|
# relation. If the query used inner joins, then the join to fk_rel
|
|
# would remove o from the results. So, in effect we are testing that
|
|
# we are promoting the fk_rel join to a left outer join here.
|
|
# 2. The default value of 3 is generated for the case expression.
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(pk=o.pk).annotate(
|
|
foo=Case(
|
|
When(fk_rel__pk=1, then=2),
|
|
default=3,
|
|
),
|
|
bar=Case(
|
|
When(fk_rel__pk=1, then=4),
|
|
default=5,
|
|
),
|
|
),
|
|
[(o, 3, 5)],
|
|
lambda x: (x, x.foo, x.bar)
|
|
)
|
|
# Now 2 should be generated, as the fk_rel is null.
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.filter(pk=o.pk).annotate(
|
|
foo=Case(
|
|
When(fk_rel__isnull=True, then=2),
|
|
default=3,
|
|
),
|
|
bar=Case(
|
|
When(fk_rel__isnull=True, then=4),
|
|
default=5,
|
|
),
|
|
),
|
|
[(o, 2, 4)],
|
|
lambda x: (x, x.foo, x.bar)
|
|
)
|
|
|
|
def test_m2m_exclude(self):
|
|
CaseTestModel.objects.create(integer=10, integer2=1, string='1')
|
|
qs = CaseTestModel.objects.values_list('id', 'integer').annotate(
|
|
cnt=Sum(
|
|
Case(When(~Q(fk_rel__integer=1), then=1), default=2),
|
|
),
|
|
).order_by('integer')
|
|
# The first o has 2 as its fk_rel__integer=1, thus it hits the
|
|
# default=2 case. The other ones have 2 as the result as they have 2
|
|
# fk_rel objects, except for integer=4 and integer=10 (created above).
|
|
# The integer=4 case has one integer, thus the result is 1, and
|
|
# integer=10 doesn't have any and this too generates 1 (instead of 0)
|
|
# as ~Q() also matches nulls.
|
|
self.assertQuerysetEqual(
|
|
qs,
|
|
[(1, 2), (2, 2), (2, 2), (3, 2), (3, 2), (3, 2), (4, 1), (10, 1)],
|
|
lambda x: x[1:]
|
|
)
|
|
|
|
def test_m2m_reuse(self):
|
|
CaseTestModel.objects.create(integer=10, integer2=1, string='1')
|
|
# Need to use values before annotate so that Oracle will not group
|
|
# by fields it isn't capable of grouping by.
|
|
qs = CaseTestModel.objects.values_list('id', 'integer').annotate(
|
|
cnt=Sum(
|
|
Case(When(~Q(fk_rel__integer=1), then=1), default=2),
|
|
),
|
|
).annotate(
|
|
cnt2=Sum(
|
|
Case(When(~Q(fk_rel__integer=1), then=1), default=2),
|
|
),
|
|
).order_by('integer')
|
|
self.assertEqual(str(qs.query).count(' JOIN '), 1)
|
|
self.assertQuerysetEqual(
|
|
qs,
|
|
[(1, 2, 2), (2, 2, 2), (2, 2, 2), (3, 2, 2), (3, 2, 2), (3, 2, 2), (4, 1, 1), (10, 1, 1)],
|
|
lambda x: x[1:]
|
|
)
|
|
|
|
def test_aggregation_empty_cases(self):
|
|
tests = [
|
|
# Empty cases and default.
|
|
(Case(output_field=IntegerField()), None),
|
|
# Empty cases and a constant default.
|
|
(Case(default=Value('empty')), 'empty'),
|
|
# Empty cases and column in the default.
|
|
(Case(default=F('url')), ''),
|
|
]
|
|
for case, value in tests:
|
|
with self.subTest(case=case):
|
|
self.assertQuerysetEqual(
|
|
CaseTestModel.objects.values('string').annotate(
|
|
case=case,
|
|
integer_sum=Sum('integer'),
|
|
).order_by('string'),
|
|
[
|
|
('1', value, 1),
|
|
('2', value, 4),
|
|
('3', value, 9),
|
|
('4', value, 4),
|
|
],
|
|
transform=itemgetter('string', 'case', 'integer_sum'),
|
|
)
|
|
|
|
|
|
class CaseDocumentationExamples(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
Client.objects.create(
|
|
name='Jane Doe',
|
|
account_type=Client.REGULAR,
|
|
registered_on=date.today() - timedelta(days=36),
|
|
)
|
|
Client.objects.create(
|
|
name='James Smith',
|
|
account_type=Client.GOLD,
|
|
registered_on=date.today() - timedelta(days=5),
|
|
)
|
|
Client.objects.create(
|
|
name='Jack Black',
|
|
account_type=Client.PLATINUM,
|
|
registered_on=date.today() - timedelta(days=10 * 365),
|
|
)
|
|
|
|
def test_simple_example(self):
|
|
self.assertQuerysetEqual(
|
|
Client.objects.annotate(
|
|
discount=Case(
|
|
When(account_type=Client.GOLD, then=Value('5%')),
|
|
When(account_type=Client.PLATINUM, then=Value('10%')),
|
|
default=Value('0%'),
|
|
),
|
|
).order_by('pk'),
|
|
[('Jane Doe', '0%'), ('James Smith', '5%'), ('Jack Black', '10%')],
|
|
transform=attrgetter('name', 'discount')
|
|
)
|
|
|
|
def test_lookup_example(self):
|
|
a_month_ago = date.today() - timedelta(days=30)
|
|
a_year_ago = date.today() - timedelta(days=365)
|
|
self.assertQuerysetEqual(
|
|
Client.objects.annotate(
|
|
discount=Case(
|
|
When(registered_on__lte=a_year_ago, then=Value('10%')),
|
|
When(registered_on__lte=a_month_ago, then=Value('5%')),
|
|
default=Value('0%'),
|
|
),
|
|
).order_by('pk'),
|
|
[('Jane Doe', '5%'), ('James Smith', '0%'), ('Jack Black', '10%')],
|
|
transform=attrgetter('name', 'discount')
|
|
)
|
|
|
|
def test_conditional_update_example(self):
|
|
a_month_ago = date.today() - timedelta(days=30)
|
|
a_year_ago = date.today() - timedelta(days=365)
|
|
Client.objects.update(
|
|
account_type=Case(
|
|
When(registered_on__lte=a_year_ago, then=Value(Client.PLATINUM)),
|
|
When(registered_on__lte=a_month_ago, then=Value(Client.GOLD)),
|
|
default=Value(Client.REGULAR),
|
|
),
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Client.objects.all().order_by('pk'),
|
|
[('Jane Doe', 'G'), ('James Smith', 'R'), ('Jack Black', 'P')],
|
|
transform=attrgetter('name', 'account_type')
|
|
)
|
|
|
|
def test_conditional_aggregation_example(self):
|
|
Client.objects.create(
|
|
name='Jean Grey',
|
|
account_type=Client.REGULAR,
|
|
registered_on=date.today(),
|
|
)
|
|
Client.objects.create(
|
|
name='James Bond',
|
|
account_type=Client.PLATINUM,
|
|
registered_on=date.today(),
|
|
)
|
|
Client.objects.create(
|
|
name='Jane Porter',
|
|
account_type=Client.PLATINUM,
|
|
registered_on=date.today(),
|
|
)
|
|
self.assertEqual(
|
|
Client.objects.aggregate(
|
|
regular=Count('pk', filter=Q(account_type=Client.REGULAR)),
|
|
gold=Count('pk', filter=Q(account_type=Client.GOLD)),
|
|
platinum=Count('pk', filter=Q(account_type=Client.PLATINUM)),
|
|
),
|
|
{'regular': 2, 'gold': 1, 'platinum': 3}
|
|
)
|
|
# This was the example before the filter argument was added.
|
|
self.assertEqual(
|
|
Client.objects.aggregate(
|
|
regular=Sum(Case(
|
|
When(account_type=Client.REGULAR, then=1),
|
|
)),
|
|
gold=Sum(Case(
|
|
When(account_type=Client.GOLD, then=1),
|
|
)),
|
|
platinum=Sum(Case(
|
|
When(account_type=Client.PLATINUM, then=1),
|
|
)),
|
|
),
|
|
{'regular': 2, 'gold': 1, 'platinum': 3}
|
|
)
|
|
|
|
def test_filter_example(self):
|
|
a_month_ago = date.today() - timedelta(days=30)
|
|
a_year_ago = date.today() - timedelta(days=365)
|
|
self.assertQuerysetEqual(
|
|
Client.objects.filter(
|
|
registered_on__lte=Case(
|
|
When(account_type=Client.GOLD, then=a_month_ago),
|
|
When(account_type=Client.PLATINUM, then=a_year_ago),
|
|
),
|
|
),
|
|
[('Jack Black', 'P')],
|
|
transform=attrgetter('name', 'account_type')
|
|
)
|
|
|
|
def test_hash(self):
|
|
expression_1 = Case(
|
|
When(account_type__in=[Client.REGULAR, Client.GOLD], then=1),
|
|
default=2,
|
|
output_field=IntegerField(),
|
|
)
|
|
expression_2 = Case(
|
|
When(account_type__in=(Client.REGULAR, Client.GOLD), then=1),
|
|
default=2,
|
|
output_field=IntegerField(),
|
|
)
|
|
expression_3 = Case(When(account_type__in=[Client.REGULAR, Client.GOLD], then=1), default=2)
|
|
expression_4 = Case(When(account_type__in=[Client.PLATINUM, Client.GOLD], then=2), default=1)
|
|
self.assertEqual(hash(expression_1), hash(expression_2))
|
|
self.assertNotEqual(hash(expression_2), hash(expression_3))
|
|
self.assertNotEqual(hash(expression_1), hash(expression_4))
|
|
self.assertNotEqual(hash(expression_3), hash(expression_4))
|
|
|
|
|
|
class CaseWhenTests(SimpleTestCase):
|
|
def test_only_when_arguments(self):
|
|
msg = 'Positional arguments must all be When objects.'
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
Case(When(Q(pk__in=[])), object())
|
|
|
|
def test_invalid_when_constructor_args(self):
|
|
msg = (
|
|
'When() supports a Q object, a boolean expression, or lookups as '
|
|
'a condition.'
|
|
)
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
When(condition=object())
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
When(condition=Value(1))
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
When(Value(1), string='1')
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
When()
|
|
|
|
def test_empty_q_object(self):
|
|
msg = "An empty Q() can't be used as a When() condition."
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
When(Q(), then=Value(True))
|