233 lines
8.8 KiB
Python
233 lines
8.8 KiB
Python
from __future__ import absolute_import
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from django.core import management
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from django.contrib.auth.models import User
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from django.test import TestCase
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from django.utils.six import StringIO
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from .models import (Person, Group, Membership, UserMembership, Car, Driver,
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CarDriver)
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class M2MThroughTestCase(TestCase):
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def test_everything(self):
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bob = Person.objects.create(name="Bob")
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jim = Person.objects.create(name="Jim")
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rock = Group.objects.create(name="Rock")
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roll = Group.objects.create(name="Roll")
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frank = User.objects.create_user("frank", "frank@example.com", "password")
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jane = User.objects.create_user("jane", "jane@example.com", "password")
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Membership.objects.create(person=bob, group=rock)
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Membership.objects.create(person=bob, group=roll)
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Membership.objects.create(person=jim, group=rock)
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self.assertQuerysetEqual(
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bob.group_set.all(), [
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"<Group: Rock>",
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"<Group: Roll>",
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]
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)
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self.assertQuerysetEqual(
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roll.members.all(), [
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"<Person: Bob>",
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]
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)
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self.assertRaises(AttributeError, setattr, bob, "group_set", [])
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self.assertRaises(AttributeError, setattr, roll, "members", [])
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self.assertRaises(AttributeError, rock.members.create, name="Anne")
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self.assertRaises(AttributeError, bob.group_set.create, name="Funk")
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UserMembership.objects.create(user=frank, group=rock)
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UserMembership.objects.create(user=frank, group=roll)
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UserMembership.objects.create(user=jane, group=rock)
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self.assertQuerysetEqual(
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frank.group_set.all(), [
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"<Group: Rock>",
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"<Group: Roll>",
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]
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)
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self.assertQuerysetEqual(
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roll.user_members.all(), [
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"<User: frank>",
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]
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)
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def test_serialization(self):
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"m2m-through models aren't serialized as m2m fields. Refs #8134"
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p = Person.objects.create(name="Bob")
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g = Group.objects.create(name="Roll")
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m =Membership.objects.create(person=p, group=g)
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pks = {"p_pk": p.pk, "g_pk": g.pk, "m_pk": m.pk}
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out = StringIO()
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management.call_command("dumpdata", "m2m_through_regress", format="json", stdout=out)
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self.assertEqual(out.getvalue().strip(), """[{"pk": %(m_pk)s, "model": "m2m_through_regress.membership", "fields": {"person": %(p_pk)s, "price": 100, "group": %(g_pk)s}}, {"pk": %(p_pk)s, "model": "m2m_through_regress.person", "fields": {"name": "Bob"}}, {"pk": %(g_pk)s, "model": "m2m_through_regress.group", "fields": {"name": "Roll"}}]""" % pks)
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out = StringIO()
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management.call_command("dumpdata", "m2m_through_regress", format="xml",
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indent=2, stdout=out)
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self.assertEqual(out.getvalue().strip(), """
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<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object pk="%(m_pk)s" model="m2m_through_regress.membership">
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<field to="m2m_through_regress.person" name="person" rel="ManyToOneRel">%(p_pk)s</field>
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<field to="m2m_through_regress.group" name="group" rel="ManyToOneRel">%(g_pk)s</field>
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<field type="IntegerField" name="price">100</field>
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</object>
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<object pk="%(p_pk)s" model="m2m_through_regress.person">
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<field type="CharField" name="name">Bob</field>
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</object>
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<object pk="%(g_pk)s" model="m2m_through_regress.group">
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<field type="CharField" name="name">Roll</field>
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</object>
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</django-objects>
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""".strip() % pks)
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def test_join_trimming(self):
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"Check that we don't involve too many copies of the intermediate table when doing a join. Refs #8046, #8254"
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bob = Person.objects.create(name="Bob")
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jim = Person.objects.create(name="Jim")
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rock = Group.objects.create(name="Rock")
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roll = Group.objects.create(name="Roll")
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Membership.objects.create(person=bob, group=rock)
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Membership.objects.create(person=jim, group=rock, price=50)
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Membership.objects.create(person=bob, group=roll, price=50)
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self.assertQuerysetEqual(
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rock.members.filter(membership__price=50), [
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"<Person: Jim>",
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]
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)
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self.assertQuerysetEqual(
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bob.group_set.filter(membership__price=50), [
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"<Group: Roll>",
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]
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)
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class ToFieldThroughTests(TestCase):
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def setUp(self):
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self.car = Car.objects.create(make="Toyota")
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self.driver = Driver.objects.create(name="Ryan Briscoe")
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CarDriver.objects.create(car=self.car, driver=self.driver)
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# We are testing if wrong objects get deleted due to using wrong
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# field value in m2m queries. So, it is essential that the pk
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# numberings do not match.
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# Create one intentionally unused driver to mix up the autonumbering
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self.unused_driver = Driver.objects.create(name="Barney Gumble")
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# And two intentionally unused cars.
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self.unused_car1 = Car.objects.create(make="Trabant")
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self.unused_car2 = Car.objects.create(make="Wartburg")
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def test_to_field(self):
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self.assertQuerysetEqual(
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self.car.drivers.all(),
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["<Driver: Ryan Briscoe>"]
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)
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def test_to_field_reverse(self):
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self.assertQuerysetEqual(
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self.driver.car_set.all(),
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["<Car: Toyota>"]
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)
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def test_to_field_clear_reverse(self):
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self.driver.car_set.clear()
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self.assertQuerysetEqual(
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self.driver.car_set.all(),[])
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def test_to_field_clear(self):
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self.car.drivers.clear()
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self.assertQuerysetEqual(
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self.car.drivers.all(),[])
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# Low level tests for _add_items and _remove_items. We test these methods
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# because .add/.remove aren't available for m2m fields with through, but
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# through is the only way to set to_field currently. We do want to make
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# sure these methods are ready if the ability to use .add or .remove with
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# to_field relations is added some day.
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def test_add(self):
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self.assertQuerysetEqual(
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self.car.drivers.all(),
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["<Driver: Ryan Briscoe>"]
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)
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# Yikes - barney is going to drive...
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self.car.drivers._add_items('car', 'driver', self.unused_driver)
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self.assertQuerysetEqual(
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self.car.drivers.all(),
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["<Driver: Barney Gumble>", "<Driver: Ryan Briscoe>"]
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)
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def test_add_null(self):
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nullcar = Car.objects.create(make=None)
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with self.assertRaises(ValueError):
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nullcar.drivers._add_items('car', 'driver', self.unused_driver)
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def test_add_related_null(self):
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nulldriver = Driver.objects.create(name=None)
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with self.assertRaises(ValueError):
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self.car.drivers._add_items('car', 'driver', nulldriver)
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def test_add_reverse(self):
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car2 = Car.objects.create(make="Honda")
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self.assertQuerysetEqual(
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self.driver.car_set.all(),
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["<Car: Toyota>"]
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)
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self.driver.car_set._add_items('driver', 'car', car2)
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self.assertQuerysetEqual(
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self.driver.car_set.all(),
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["<Car: Toyota>", "<Car: Honda>"]
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)
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def test_add_null_reverse(self):
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nullcar = Car.objects.create(make=None)
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with self.assertRaises(ValueError):
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self.driver.car_set._add_items('driver', 'car', nullcar)
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def test_add_null_reverse_related(self):
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nulldriver = Driver.objects.create(name=None)
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with self.assertRaises(ValueError):
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nulldriver.car_set._add_items('driver', 'car', self.car)
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def test_remove(self):
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self.assertQuerysetEqual(
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self.car.drivers.all(),
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["<Driver: Ryan Briscoe>"]
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)
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self.car.drivers._remove_items('car', 'driver', self.driver)
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self.assertQuerysetEqual(
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self.car.drivers.all(),[])
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def test_remove_reverse(self):
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self.assertQuerysetEqual(
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self.driver.car_set.all(),
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["<Car: Toyota>"]
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)
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self.driver.car_set._remove_items('driver', 'car', self.car)
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self.assertQuerysetEqual(
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self.driver.car_set.all(),[])
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class ThroughLoadDataTestCase(TestCase):
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fixtures = ["m2m_through"]
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def test_sequence_creation(self):
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"Check that sequences on an m2m_through are created for the through model, not a phantom auto-generated m2m table. Refs #11107"
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out = StringIO()
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management.call_command("dumpdata", "m2m_through_regress", format="json", stdout=out)
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self.assertEqual(out.getvalue().strip(), """[{"pk": 1, "model": "m2m_through_regress.usermembership", "fields": {"price": 100, "group": 1, "user": 1}}, {"pk": 1, "model": "m2m_through_regress.person", "fields": {"name": "Guido"}}, {"pk": 1, "model": "m2m_through_regress.group", "fields": {"name": "Python Core Group"}}]""")
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