536 lines
22 KiB
Python
536 lines
22 KiB
Python
from datetime import date, datetime, timedelta
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from operator import attrgetter
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from django.db import IntegrityError
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from django.test import TestCase
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from .models import (
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CustomMembership,
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Employee,
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Event,
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Friendship,
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Group,
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Ingredient,
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Invitation,
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Membership,
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Person,
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PersonChild,
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PersonSelfRefM2M,
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Recipe,
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RecipeIngredient,
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Relationship,
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SymmetricalFriendship,
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)
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class M2mThroughTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.bob = Person.objects.create(name="Bob")
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cls.jim = Person.objects.create(name="Jim")
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cls.jane = Person.objects.create(name="Jane")
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cls.rock = Group.objects.create(name="Rock")
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cls.roll = Group.objects.create(name="Roll")
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def test_reverse_inherited_m2m_with_through_fields_list_hashable(self):
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reverse_m2m = Person._meta.get_field("events_invited")
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self.assertEqual(reverse_m2m.through_fields, ["event", "invitee"])
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inherited_reverse_m2m = PersonChild._meta.get_field("events_invited")
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self.assertEqual(inherited_reverse_m2m.through_fields, ["event", "invitee"])
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self.assertEqual(hash(reverse_m2m), hash(inherited_reverse_m2m))
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def test_retrieve_intermediate_items(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(person=self.jane, group=self.rock)
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expected = ["Jane", "Jim"]
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self.assertQuerysetEqual(self.rock.members.all(), expected, attrgetter("name"))
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def test_get_on_intermediate_model(self):
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Membership.objects.create(person=self.jane, group=self.rock)
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queryset = Membership.objects.get(person=self.jane, group=self.rock)
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self.assertEqual(repr(queryset), "<Membership: Jane is a member of Rock>")
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def test_filter_on_intermediate_model(self):
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m1 = Membership.objects.create(person=self.jim, group=self.rock)
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m2 = Membership.objects.create(person=self.jane, group=self.rock)
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queryset = Membership.objects.filter(group=self.rock)
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self.assertSequenceEqual(queryset, [m1, m2])
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def test_add_on_m2m_with_intermediate_model(self):
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self.rock.members.add(
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self.bob, through_defaults={"invite_reason": "He is good."}
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)
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self.assertSequenceEqual(self.rock.members.all(), [self.bob])
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self.assertEqual(self.rock.membership_set.get().invite_reason, "He is good.")
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def test_add_on_m2m_with_intermediate_model_callable_through_default(self):
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def invite_reason_callable():
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return "They were good at %s" % datetime.now()
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self.rock.members.add(
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self.bob,
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self.jane,
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through_defaults={"invite_reason": invite_reason_callable},
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)
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self.assertSequenceEqual(self.rock.members.all(), [self.bob, self.jane])
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self.assertEqual(
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self.rock.membership_set.filter(
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invite_reason__startswith="They were good at ",
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).count(),
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2,
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)
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# invite_reason_callable() is called once.
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self.assertEqual(
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self.bob.membership_set.get().invite_reason,
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self.jane.membership_set.get().invite_reason,
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)
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def test_set_on_m2m_with_intermediate_model_callable_through_default(self):
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self.rock.members.set(
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[self.bob, self.jane],
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through_defaults={"invite_reason": lambda: "Why not?"},
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)
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self.assertSequenceEqual(self.rock.members.all(), [self.bob, self.jane])
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self.assertEqual(
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self.rock.membership_set.filter(
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invite_reason__startswith="Why not?",
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).count(),
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2,
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)
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def test_add_on_m2m_with_intermediate_model_value_required(self):
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self.rock.nodefaultsnonulls.add(
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self.jim, through_defaults={"nodefaultnonull": 1}
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 1)
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def test_add_on_m2m_with_intermediate_model_value_required_fails(self):
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with self.assertRaises(IntegrityError):
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self.rock.nodefaultsnonulls.add(self.jim)
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def test_create_on_m2m_with_intermediate_model(self):
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annie = self.rock.members.create(
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name="Annie", through_defaults={"invite_reason": "She was just awesome."}
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)
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self.assertSequenceEqual(self.rock.members.all(), [annie])
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self.assertEqual(
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self.rock.membership_set.get().invite_reason, "She was just awesome."
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)
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def test_create_on_m2m_with_intermediate_model_callable_through_default(self):
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annie = self.rock.members.create(
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name="Annie",
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through_defaults={"invite_reason": lambda: "She was just awesome."},
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)
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self.assertSequenceEqual(self.rock.members.all(), [annie])
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self.assertEqual(
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self.rock.membership_set.get().invite_reason,
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"She was just awesome.",
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)
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def test_create_on_m2m_with_intermediate_model_value_required(self):
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self.rock.nodefaultsnonulls.create(
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name="Test", through_defaults={"nodefaultnonull": 1}
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 1)
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def test_create_on_m2m_with_intermediate_model_value_required_fails(self):
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with self.assertRaises(IntegrityError):
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self.rock.nodefaultsnonulls.create(name="Test")
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def test_get_or_create_on_m2m_with_intermediate_model_value_required(self):
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self.rock.nodefaultsnonulls.get_or_create(
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name="Test", through_defaults={"nodefaultnonull": 1}
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 1)
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def test_get_or_create_on_m2m_with_intermediate_model_value_required_fails(self):
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with self.assertRaises(IntegrityError):
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self.rock.nodefaultsnonulls.get_or_create(name="Test")
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def test_update_or_create_on_m2m_with_intermediate_model_value_required(self):
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self.rock.nodefaultsnonulls.update_or_create(
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name="Test", through_defaults={"nodefaultnonull": 1}
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 1)
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def test_update_or_create_on_m2m_with_intermediate_model_value_required_fails(self):
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with self.assertRaises(IntegrityError):
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self.rock.nodefaultsnonulls.update_or_create(name="Test")
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def test_remove_on_m2m_with_intermediate_model(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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self.rock.members.remove(self.jim)
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self.assertSequenceEqual(self.rock.members.all(), [])
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def test_remove_on_m2m_with_intermediate_model_multiple(self):
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Membership.objects.create(person=self.jim, group=self.rock, invite_reason="1")
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Membership.objects.create(person=self.jim, group=self.rock, invite_reason="2")
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self.assertSequenceEqual(self.rock.members.all(), [self.jim, self.jim])
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self.rock.members.remove(self.jim)
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self.assertSequenceEqual(self.rock.members.all(), [])
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def test_set_on_m2m_with_intermediate_model(self):
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members = list(Person.objects.filter(name__in=["Bob", "Jim"]))
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self.rock.members.set(members)
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self.assertSequenceEqual(self.rock.members.all(), [self.bob, self.jim])
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def test_set_on_m2m_with_intermediate_model_value_required(self):
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self.rock.nodefaultsnonulls.set(
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[self.jim], through_defaults={"nodefaultnonull": 1}
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 1)
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self.rock.nodefaultsnonulls.set(
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[self.jim], through_defaults={"nodefaultnonull": 2}
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 1)
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self.rock.nodefaultsnonulls.set(
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[self.jim], through_defaults={"nodefaultnonull": 2}, clear=True
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)
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self.assertEqual(self.rock.testnodefaultsornulls_set.get().nodefaultnonull, 2)
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def test_set_on_m2m_with_intermediate_model_value_required_fails(self):
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with self.assertRaises(IntegrityError):
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self.rock.nodefaultsnonulls.set([self.jim])
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def test_clear_removes_all_the_m2m_relationships(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(person=self.jane, group=self.rock)
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self.rock.members.clear()
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self.assertQuerysetEqual(self.rock.members.all(), [])
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def test_retrieve_reverse_intermediate_items(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(person=self.jim, group=self.roll)
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expected = ["Rock", "Roll"]
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self.assertQuerysetEqual(self.jim.group_set.all(), expected, attrgetter("name"))
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def test_add_on_reverse_m2m_with_intermediate_model(self):
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self.bob.group_set.add(self.rock)
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self.assertSequenceEqual(self.bob.group_set.all(), [self.rock])
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def test_create_on_reverse_m2m_with_intermediate_model(self):
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funk = self.bob.group_set.create(name="Funk")
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self.assertSequenceEqual(self.bob.group_set.all(), [funk])
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def test_remove_on_reverse_m2m_with_intermediate_model(self):
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Membership.objects.create(person=self.bob, group=self.rock)
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self.bob.group_set.remove(self.rock)
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self.assertSequenceEqual(self.bob.group_set.all(), [])
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def test_set_on_reverse_m2m_with_intermediate_model(self):
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members = list(Group.objects.filter(name__in=["Rock", "Roll"]))
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self.bob.group_set.set(members)
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self.assertSequenceEqual(self.bob.group_set.all(), [self.rock, self.roll])
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def test_clear_on_reverse_removes_all_the_m2m_relationships(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(person=self.jim, group=self.roll)
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self.jim.group_set.clear()
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self.assertQuerysetEqual(self.jim.group_set.all(), [])
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def test_query_model_by_attribute_name_of_related_model(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(person=self.jane, group=self.rock)
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Membership.objects.create(person=self.bob, group=self.roll)
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Membership.objects.create(person=self.jim, group=self.roll)
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Membership.objects.create(person=self.jane, group=self.roll)
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self.assertQuerysetEqual(
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Group.objects.filter(members__name="Bob"), ["Roll"], attrgetter("name")
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)
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def test_order_by_relational_field_through_model(self):
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today = datetime.now()
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yesterday = today - timedelta(days=1)
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CustomMembership.objects.create(
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person=self.jim, group=self.rock, date_joined=yesterday
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)
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CustomMembership.objects.create(
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person=self.bob, group=self.rock, date_joined=today
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)
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CustomMembership.objects.create(
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person=self.jane, group=self.roll, date_joined=yesterday
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)
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CustomMembership.objects.create(
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person=self.jim, group=self.roll, date_joined=today
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)
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self.assertSequenceEqual(
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self.rock.custom_members.order_by("custom_person_related_name"),
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[self.jim, self.bob],
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)
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self.assertSequenceEqual(
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self.roll.custom_members.order_by("custom_person_related_name"),
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[self.jane, self.jim],
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)
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def test_query_first_model_by_intermediate_model_attribute(self):
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Membership.objects.create(
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person=self.jane, group=self.roll, invite_reason="She was just awesome."
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)
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Membership.objects.create(
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person=self.jim, group=self.roll, invite_reason="He is good."
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)
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Membership.objects.create(person=self.bob, group=self.roll)
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qs = Group.objects.filter(membership__invite_reason="She was just awesome.")
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self.assertQuerysetEqual(qs, ["Roll"], attrgetter("name"))
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def test_query_second_model_by_intermediate_model_attribute(self):
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Membership.objects.create(
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person=self.jane, group=self.roll, invite_reason="She was just awesome."
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)
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Membership.objects.create(
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person=self.jim, group=self.roll, invite_reason="He is good."
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)
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Membership.objects.create(person=self.bob, group=self.roll)
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qs = Person.objects.filter(membership__invite_reason="She was just awesome.")
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self.assertQuerysetEqual(qs, ["Jane"], attrgetter("name"))
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def test_query_model_by_related_model_name(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(person=self.jane, group=self.rock)
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Membership.objects.create(person=self.bob, group=self.roll)
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Membership.objects.create(person=self.jim, group=self.roll)
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Membership.objects.create(person=self.jane, group=self.roll)
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self.assertQuerysetEqual(
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Person.objects.filter(group__name="Rock"),
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["Jane", "Jim"],
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attrgetter("name"),
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)
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def test_query_model_by_custom_related_name(self):
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CustomMembership.objects.create(person=self.bob, group=self.rock)
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CustomMembership.objects.create(person=self.jim, group=self.rock)
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self.assertQuerysetEqual(
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Person.objects.filter(custom__name="Rock"),
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["Bob", "Jim"],
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attrgetter("name"),
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)
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def test_query_model_by_intermediate_can_return_non_unique_queryset(self):
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Membership.objects.create(person=self.jim, group=self.rock)
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Membership.objects.create(
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person=self.jane, group=self.rock, date_joined=datetime(2006, 1, 1)
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)
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Membership.objects.create(
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person=self.bob, group=self.roll, date_joined=datetime(2004, 1, 1)
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)
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Membership.objects.create(person=self.jim, group=self.roll)
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Membership.objects.create(
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person=self.jane, group=self.roll, date_joined=datetime(2004, 1, 1)
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)
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qs = Person.objects.filter(membership__date_joined__gt=datetime(2004, 1, 1))
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self.assertQuerysetEqual(qs, ["Jane", "Jim", "Jim"], attrgetter("name"))
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def test_custom_related_name_forward_empty_qs(self):
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self.assertQuerysetEqual(self.rock.custom_members.all(), [])
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def test_custom_related_name_reverse_empty_qs(self):
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self.assertQuerysetEqual(self.bob.custom.all(), [])
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def test_custom_related_name_forward_non_empty_qs(self):
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CustomMembership.objects.create(person=self.bob, group=self.rock)
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CustomMembership.objects.create(person=self.jim, group=self.rock)
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self.assertQuerysetEqual(
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self.rock.custom_members.all(), ["Bob", "Jim"], attrgetter("name")
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)
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def test_custom_related_name_reverse_non_empty_qs(self):
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CustomMembership.objects.create(person=self.bob, group=self.rock)
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CustomMembership.objects.create(person=self.jim, group=self.rock)
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self.assertQuerysetEqual(self.bob.custom.all(), ["Rock"], attrgetter("name"))
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def test_custom_related_name_doesnt_conflict_with_fky_related_name(self):
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c = CustomMembership.objects.create(person=self.bob, group=self.rock)
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self.assertSequenceEqual(self.bob.custom_person_related_name.all(), [c])
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def test_through_fields(self):
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"""
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Relations with intermediary tables with multiple FKs
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to the M2M's ``to`` model are possible.
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"""
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event = Event.objects.create(title="Rockwhale 2014")
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Invitation.objects.create(event=event, inviter=self.bob, invitee=self.jim)
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Invitation.objects.create(event=event, inviter=self.bob, invitee=self.jane)
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self.assertQuerysetEqual(
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event.invitees.all(), ["Jane", "Jim"], attrgetter("name")
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)
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class M2mThroughReferentialTests(TestCase):
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def test_self_referential_empty_qs(self):
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tony = PersonSelfRefM2M.objects.create(name="Tony")
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self.assertQuerysetEqual(tony.friends.all(), [])
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def test_self_referential_non_symmetrical_first_side(self):
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tony = PersonSelfRefM2M.objects.create(name="Tony")
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chris = PersonSelfRefM2M.objects.create(name="Chris")
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Friendship.objects.create(
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first=tony, second=chris, date_friended=datetime.now()
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)
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self.assertQuerysetEqual(tony.friends.all(), ["Chris"], attrgetter("name"))
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def test_self_referential_non_symmetrical_second_side(self):
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tony = PersonSelfRefM2M.objects.create(name="Tony")
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chris = PersonSelfRefM2M.objects.create(name="Chris")
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Friendship.objects.create(
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first=tony, second=chris, date_friended=datetime.now()
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)
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self.assertQuerysetEqual(chris.friends.all(), [])
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def test_self_referential_non_symmetrical_clear_first_side(self):
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tony = PersonSelfRefM2M.objects.create(name="Tony")
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chris = PersonSelfRefM2M.objects.create(name="Chris")
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Friendship.objects.create(
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first=tony, second=chris, date_friended=datetime.now()
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)
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chris.friends.clear()
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self.assertQuerysetEqual(chris.friends.all(), [])
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# Since this isn't a symmetrical relation, Tony's friend link still exists.
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self.assertQuerysetEqual(tony.friends.all(), ["Chris"], attrgetter("name"))
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def test_self_referential_non_symmetrical_both(self):
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tony = PersonSelfRefM2M.objects.create(name="Tony")
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chris = PersonSelfRefM2M.objects.create(name="Chris")
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Friendship.objects.create(
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first=tony, second=chris, date_friended=datetime.now()
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)
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Friendship.objects.create(
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first=chris, second=tony, date_friended=datetime.now()
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)
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|
|
self.assertQuerysetEqual(tony.friends.all(), ["Chris"], attrgetter("name"))
|
|
|
|
self.assertQuerysetEqual(chris.friends.all(), ["Tony"], attrgetter("name"))
|
|
|
|
def test_through_fields_self_referential(self):
|
|
john = Employee.objects.create(name="john")
|
|
peter = Employee.objects.create(name="peter")
|
|
mary = Employee.objects.create(name="mary")
|
|
harry = Employee.objects.create(name="harry")
|
|
|
|
Relationship.objects.create(source=john, target=peter, another=None)
|
|
Relationship.objects.create(source=john, target=mary, another=None)
|
|
Relationship.objects.create(source=john, target=harry, another=peter)
|
|
|
|
self.assertQuerysetEqual(
|
|
john.subordinates.all(), ["peter", "mary", "harry"], attrgetter("name")
|
|
)
|
|
|
|
def test_self_referential_symmetrical(self):
|
|
tony = PersonSelfRefM2M.objects.create(name="Tony")
|
|
chris = PersonSelfRefM2M.objects.create(name="Chris")
|
|
SymmetricalFriendship.objects.create(
|
|
first=tony,
|
|
second=chris,
|
|
date_friended=date.today(),
|
|
)
|
|
self.assertSequenceEqual(tony.sym_friends.all(), [chris])
|
|
# Manually created symmetrical m2m relation doesn't add mirror entry
|
|
# automatically.
|
|
self.assertSequenceEqual(chris.sym_friends.all(), [])
|
|
SymmetricalFriendship.objects.create(
|
|
first=chris, second=tony, date_friended=date.today()
|
|
)
|
|
self.assertSequenceEqual(chris.sym_friends.all(), [tony])
|
|
|
|
def test_add_on_symmetrical_m2m_with_intermediate_model(self):
|
|
tony = PersonSelfRefM2M.objects.create(name="Tony")
|
|
chris = PersonSelfRefM2M.objects.create(name="Chris")
|
|
date_friended = date(2017, 1, 3)
|
|
tony.sym_friends.add(chris, through_defaults={"date_friended": date_friended})
|
|
self.assertSequenceEqual(tony.sym_friends.all(), [chris])
|
|
self.assertSequenceEqual(chris.sym_friends.all(), [tony])
|
|
friendship = tony.symmetricalfriendship_set.get()
|
|
self.assertEqual(friendship.date_friended, date_friended)
|
|
|
|
def test_set_on_symmetrical_m2m_with_intermediate_model(self):
|
|
tony = PersonSelfRefM2M.objects.create(name="Tony")
|
|
chris = PersonSelfRefM2M.objects.create(name="Chris")
|
|
anne = PersonSelfRefM2M.objects.create(name="Anne")
|
|
kate = PersonSelfRefM2M.objects.create(name="Kate")
|
|
date_friended_add = date(2013, 1, 5)
|
|
date_friended_set = date.today()
|
|
tony.sym_friends.add(
|
|
anne,
|
|
chris,
|
|
through_defaults={"date_friended": date_friended_add},
|
|
)
|
|
tony.sym_friends.set(
|
|
[anne, kate],
|
|
through_defaults={"date_friended": date_friended_set},
|
|
)
|
|
self.assertSequenceEqual(tony.sym_friends.all(), [anne, kate])
|
|
self.assertSequenceEqual(anne.sym_friends.all(), [tony])
|
|
self.assertSequenceEqual(kate.sym_friends.all(), [tony])
|
|
self.assertEqual(
|
|
kate.symmetricalfriendship_set.get().date_friended,
|
|
date_friended_set,
|
|
)
|
|
# Date is preserved.
|
|
self.assertEqual(
|
|
anne.symmetricalfriendship_set.get().date_friended,
|
|
date_friended_add,
|
|
)
|
|
# Recreate relationship.
|
|
tony.sym_friends.set(
|
|
[anne],
|
|
clear=True,
|
|
through_defaults={"date_friended": date_friended_set},
|
|
)
|
|
self.assertSequenceEqual(tony.sym_friends.all(), [anne])
|
|
self.assertSequenceEqual(anne.sym_friends.all(), [tony])
|
|
self.assertEqual(
|
|
anne.symmetricalfriendship_set.get().date_friended,
|
|
date_friended_set,
|
|
)
|
|
|
|
|
|
class M2mThroughToFieldsTests(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.pea = Ingredient.objects.create(iname="pea")
|
|
cls.potato = Ingredient.objects.create(iname="potato")
|
|
cls.tomato = Ingredient.objects.create(iname="tomato")
|
|
cls.curry = Recipe.objects.create(rname="curry")
|
|
RecipeIngredient.objects.create(recipe=cls.curry, ingredient=cls.potato)
|
|
RecipeIngredient.objects.create(recipe=cls.curry, ingredient=cls.pea)
|
|
RecipeIngredient.objects.create(recipe=cls.curry, ingredient=cls.tomato)
|
|
|
|
def test_retrieval(self):
|
|
# Forward retrieval
|
|
self.assertSequenceEqual(
|
|
self.curry.ingredients.all(), [self.pea, self.potato, self.tomato]
|
|
)
|
|
# Backward retrieval
|
|
self.assertEqual(self.tomato.recipes.get(), self.curry)
|
|
|
|
def test_choices(self):
|
|
field = Recipe._meta.get_field("ingredients")
|
|
self.assertEqual(
|
|
[choice[0] for choice in field.get_choices(include_blank=False)],
|
|
["pea", "potato", "tomato"],
|
|
)
|