125 lines
5.7 KiB
Python
125 lines
5.7 KiB
Python
from __future__ import absolute_import
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from django.db import transaction, IntegrityError
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from django.test import TestCase
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from .models import (Place, Restaurant, Waiter, ManualPrimaryKey, RelatedModel,
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MultiModel)
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class OneToOneTests(TestCase):
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def setUp(self):
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self.p1 = Place(name='Demon Dogs', address='944 W. Fullerton')
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self.p1.save()
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self.p2 = Place(name='Ace Hardware', address='1013 N. Ashland')
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self.p2.save()
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self.r = Restaurant(place=self.p1, serves_hot_dogs=True, serves_pizza=False)
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self.r.save()
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def test_getter(self):
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# A Restaurant can access its place.
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self.assertEqual(repr(self.r.place), '<Place: Demon Dogs the place>')
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# A Place can access its restaurant, if available.
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self.assertEqual(repr(self.p1.restaurant), '<Restaurant: Demon Dogs the restaurant>')
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# p2 doesn't have an associated restaurant.
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with self.assertRaisesMessage(Restaurant.DoesNotExist, 'Place has no restaurant'):
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self.p2.restaurant
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def test_setter(self):
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# Set the place using assignment notation. Because place is the primary
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# key on Restaurant, the save will create a new restaurant
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self.r.place = self.p2
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self.r.save()
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self.assertEqual(repr(self.p2.restaurant), '<Restaurant: Ace Hardware the restaurant>')
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self.assertEqual(repr(self.r.place), '<Place: Ace Hardware the place>')
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self.assertEqual(self.p2.pk, self.r.pk)
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# Set the place back again, using assignment in the reverse direction.
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self.p1.restaurant = self.r
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self.assertEqual(repr(self.p1.restaurant), '<Restaurant: Demon Dogs the restaurant>')
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r = Restaurant.objects.get(pk=self.p1.id)
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self.assertEqual(repr(r.place), '<Place: Demon Dogs the place>')
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def test_manager_all(self):
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# Restaurant.objects.all() just returns the Restaurants, not the Places.
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self.assertQuerysetEqual(Restaurant.objects.all(), [
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'<Restaurant: Demon Dogs the restaurant>',
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])
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# Place.objects.all() returns all Places, regardless of whether they
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# have Restaurants.
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self.assertQuerysetEqual(Place.objects.order_by('name'), [
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'<Place: Ace Hardware the place>',
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'<Place: Demon Dogs the place>',
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])
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def test_manager_get(self):
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def assert_get_restaurant(**params):
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self.assertEqual(repr(Restaurant.objects.get(**params)),
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'<Restaurant: Demon Dogs the restaurant>')
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assert_get_restaurant(place__id__exact=self.p1.pk)
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assert_get_restaurant(place__id=self.p1.pk)
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assert_get_restaurant(place__exact=self.p1.pk)
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assert_get_restaurant(place__exact=self.p1)
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assert_get_restaurant(place=self.p1.pk)
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assert_get_restaurant(place=self.p1)
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assert_get_restaurant(pk=self.p1.pk)
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assert_get_restaurant(place__pk__exact=self.p1.pk)
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assert_get_restaurant(place__pk=self.p1.pk)
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assert_get_restaurant(place__name__startswith="Demon")
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def assert_get_place(**params):
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self.assertEqual(repr(Place.objects.get(**params)),
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'<Place: Demon Dogs the place>')
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assert_get_place(restaurant__place__exact=self.p1.pk)
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assert_get_place(restaurant__place__exact=self.p1)
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assert_get_place(restaurant__place__pk=self.p1.pk)
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assert_get_place(restaurant__exact=self.p1.pk)
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assert_get_place(restaurant__exact=self.r)
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assert_get_place(restaurant__pk=self.p1.pk)
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assert_get_place(restaurant=self.p1.pk)
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assert_get_place(restaurant=self.r)
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assert_get_place(id__exact=self.p1.pk)
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assert_get_place(pk=self.p1.pk)
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def test_foreign_key(self):
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# Add a Waiter to the Restaurant.
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w = self.r.waiter_set.create(name='Joe')
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w.save()
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self.assertEqual(repr(w), '<Waiter: Joe the waiter at Demon Dogs the restaurant>')
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# Query the waiters
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def assert_filter_waiters(**params):
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self.assertQuerysetEqual(Waiter.objects.filter(**params), [
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'<Waiter: Joe the waiter at Demon Dogs the restaurant>'
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])
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assert_filter_waiters(restaurant__place__exact=self.p1.pk)
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assert_filter_waiters(restaurant__place__exact=self.p1)
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assert_filter_waiters(restaurant__place__pk=self.p1.pk)
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assert_filter_waiters(restaurant__exact=self.p1.pk)
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assert_filter_waiters(restaurant__exact=self.p1)
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assert_filter_waiters(restaurant__pk=self.p1.pk)
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assert_filter_waiters(restaurant=self.p1.pk)
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assert_filter_waiters(restaurant=self.r)
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assert_filter_waiters(id__exact=self.p1.pk)
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assert_filter_waiters(pk=self.p1.pk)
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# Delete the restaurant; the waiter should also be removed
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r = Restaurant.objects.get(pk=self.p1.pk)
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r.delete()
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self.assertEqual(Waiter.objects.count(), 0)
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def test_multiple_o2o(self):
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# One-to-one fields still work if you create your own primary key
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o1 = ManualPrimaryKey(primary_key="abc123", name="primary")
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o1.save()
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o2 = RelatedModel(link=o1, name="secondary")
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o2.save()
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# You can have multiple one-to-one fields on a model, too.
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x1 = MultiModel(link1=self.p1, link2=o1, name="x1")
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x1.save()
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self.assertEqual(repr(o1.multimodel), '<MultiModel: Multimodel x1>')
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# This will fail because each one-to-one field must be unique (and
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# link2=o1 was used for x1, above).
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sid = transaction.savepoint()
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mm = MultiModel(link1=self.p2, link2=o1, name="x1")
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self.assertRaises(IntegrityError, mm.save)
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transaction.savepoint_rollback(sid)
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