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from django.test import TestCase
from .models import (
CompetingTeam,
Event,
Group,
IndividualCompetitor,
Membership,
Person,
)
class MultiTableTests(TestCase):
@classmethod
def setUpTestData(cls):
cls.alice = Person.objects.create(name="Alice")
cls.bob = Person.objects.create(name="Bob")
cls.chris = Person.objects.create(name="Chris")
cls.dan = Person.objects.create(name="Dan")
cls.team_alpha = Group.objects.create(name="Alpha")
Membership.objects.create(person=cls.alice, group=cls.team_alpha)
Membership.objects.create(person=cls.bob, group=cls.team_alpha)
cls.event = Event.objects.create(name="Exposition Match")
IndividualCompetitor.objects.create(event=cls.event, person=cls.chris)
IndividualCompetitor.objects.create(event=cls.event, person=cls.dan)
CompetingTeam.objects.create(event=cls.event, team=cls.team_alpha)
def test_m2m_query(self):
result = self.event.teams.all()
self.assertCountEqual(result, [self.team_alpha])
def test_m2m_reverse_query(self):
result = self.chris.event_set.all()
self.assertCountEqual(result, [self.event])
def test_m2m_query_proxied(self):
result = self.event.special_people.all()
self.assertCountEqual(result, [self.chris, self.dan])
def test_m2m_reverse_query_proxied(self):
result = self.chris.special_event_set.all()
self.assertCountEqual(result, [self.event])
def test_m2m_prefetch_proxied(self):
result = Event.objects.filter(name="Exposition Match").prefetch_related(
"special_people"
)
with self.assertNumQueries(2):
self.assertCountEqual(result, [self.event])
self.assertEqual(
sorted(p.name for p in result[0].special_people.all()), ["Chris", "Dan"]
)
def test_m2m_prefetch_reverse_proxied(self):
result = Person.objects.filter(name="Dan").prefetch_related("special_event_set")
with self.assertNumQueries(2):
self.assertCountEqual(result, [self.dan])
self.assertEqual(
[event.name for event in result[0].special_event_set.all()],
["Exposition Match"],
)
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