Getting tests passing

1 files changed, 525 insertions, 525 deletions

diff --git a/tests/test_relations_hyperlink.py b/tests/test_relations_hyperlink.py
index 0c8eb254..315d1abf 100644
--- a/tests/test_relations_hyperlink.py
+++ b/tests/test_relations_hyperlink.py
@@ -1,525 +1,525 @@
-from __future__ import unicode_literals
-from django.conf.urls import patterns, url
-from django.test import TestCase
-from rest_framework import serializers
-from rest_framework.test import APIRequestFactory
-from tests.models import (
-    BlogPost,
-    ManyToManyTarget, ManyToManySource, ForeignKeyTarget, ForeignKeySource,
-    NullableForeignKeySource, OneToOneTarget, NullableOneToOneSource
-)
-
-factory = APIRequestFactory()
-request = factory.get('/')  # Just to ensure we have a request in the serializer context
-
-
-def dummy_view(request, pk):
-    pass
-
-urlpatterns = patterns(
-    '',
-    url(r'^dummyurl/(?P<pk>[0-9]+)/$', dummy_view, name='dummy-url'),
-    url(r'^manytomanysource/(?P<pk>[0-9]+)/$', dummy_view, name='manytomanysource-detail'),
-    url(r'^manytomanytarget/(?P<pk>[0-9]+)/$', dummy_view, name='manytomanytarget-detail'),
-    url(r'^foreignkeysource/(?P<pk>[0-9]+)/$', dummy_view, name='foreignkeysource-detail'),
-    url(r'^foreignkeytarget/(?P<pk>[0-9]+)/$', dummy_view, name='foreignkeytarget-detail'),
-    url(r'^nullableforeignkeysource/(?P<pk>[0-9]+)/$', dummy_view, name='nullableforeignkeysource-detail'),
-    url(r'^onetoonetarget/(?P<pk>[0-9]+)/$', dummy_view, name='onetoonetarget-detail'),
-    url(r'^nullableonetoonesource/(?P<pk>[0-9]+)/$', dummy_view, name='nullableonetoonesource-detail'),
-)
-
-
-# ManyToMany
-class ManyToManyTargetSerializer(serializers.HyperlinkedModelSerializer):
-    class Meta:
-        model = ManyToManyTarget
-        fields = ('url', 'name', 'sources')
-
-
-class ManyToManySourceSerializer(serializers.HyperlinkedModelSerializer):
-    class Meta:
-        model = ManyToManySource
-        fields = ('url', 'name', 'targets')
-
-
-# ForeignKey
-class ForeignKeyTargetSerializer(serializers.HyperlinkedModelSerializer):
-    class Meta:
-        model = ForeignKeyTarget
-        fields = ('url', 'name', 'sources')
-
-
-class ForeignKeySourceSerializer(serializers.HyperlinkedModelSerializer):
-    class Meta:
-        model = ForeignKeySource
-        fields = ('url', 'name', 'target')
-
-
-# Nullable ForeignKey
-class NullableForeignKeySourceSerializer(serializers.HyperlinkedModelSerializer):
-    class Meta:
-        model = NullableForeignKeySource
-        fields = ('url', 'name', 'target')
-
-
-# Nullable OneToOne
-class NullableOneToOneTargetSerializer(serializers.HyperlinkedModelSerializer):
-    class Meta:
-        model = OneToOneTarget
-        fields = ('url', 'name', 'nullable_source')
-
-
-# TODO: Add test that .data cannot be accessed prior to .is_valid
-
-class HyperlinkedManyToManyTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
-    def setUp(self):
-        for idx in range(1, 4):
-            target = ManyToManyTarget(name='target-%d' % idx)
-            target.save()
-            source = ManyToManySource(name='source-%d' % idx)
-            source.save()
-            for target in ManyToManyTarget.objects.all():
-                source.targets.add(target)
-
-    def test_many_to_many_retrieve(self):
-        queryset = ManyToManySource.objects.all()
-        serializer = ManyToManySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/']},
-            {'url': 'http://testserver/manytomanysource/2/', 'name': 'source-2', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/']},
-            {'url': 'http://testserver/manytomanysource/3/', 'name': 'source-3', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_reverse_many_to_many_retrieve(self):
-        queryset = ManyToManyTarget.objects.all()
-        serializer = ManyToManyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
-            {'url': 'http://testserver/manytomanytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
-            {'url': 'http://testserver/manytomanytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/manytomanysource/3/']}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_many_to_many_update(self):
-        data = {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']}
-        instance = ManyToManySource.objects.get(pk=1)
-        serializer = ManyToManySourceSerializer(instance, data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        serializer.save()
-        self.assertEqual(serializer.data, data)
-
-        # Ensure source 1 is updated, and everything else is as expected
-        queryset = ManyToManySource.objects.all()
-        serializer = ManyToManySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']},
-            {'url': 'http://testserver/manytomanysource/2/', 'name': 'source-2', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/']},
-            {'url': 'http://testserver/manytomanysource/3/', 'name': 'source-3', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_reverse_many_to_many_update(self):
-        data = {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/']}
-        instance = ManyToManyTarget.objects.get(pk=1)
-        serializer = ManyToManyTargetSerializer(instance, data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        serializer.save()
-        self.assertEqual(serializer.data, data)
-
-        # Ensure target 1 is updated, and everything else is as expected
-        queryset = ManyToManyTarget.objects.all()
-        serializer = ManyToManyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/']},
-            {'url': 'http://testserver/manytomanytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
-            {'url': 'http://testserver/manytomanytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/manytomanysource/3/']}
-
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_many_to_many_create(self):
-        data = {'url': 'http://testserver/manytomanysource/4/', 'name': 'source-4', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/3/']}
-        serializer = ManyToManySourceSerializer(data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        obj = serializer.save()
-        self.assertEqual(serializer.data, data)
-        self.assertEqual(obj.name, 'source-4')
-
-        # Ensure source 4 is added, and everything else is as expected
-        queryset = ManyToManySource.objects.all()
-        serializer = ManyToManySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/']},
-            {'url': 'http://testserver/manytomanysource/2/', 'name': 'source-2', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/']},
-            {'url': 'http://testserver/manytomanysource/3/', 'name': 'source-3', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']},
-            {'url': 'http://testserver/manytomanysource/4/', 'name': 'source-4', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/3/']}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_reverse_many_to_many_create(self):
-        data = {'url': 'http://testserver/manytomanytarget/4/', 'name': 'target-4', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/3/']}
-        serializer = ManyToManyTargetSerializer(data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        obj = serializer.save()
-        self.assertEqual(serializer.data, data)
-        self.assertEqual(obj.name, 'target-4')
-
-        # Ensure target 4 is added, and everything else is as expected
-        queryset = ManyToManyTarget.objects.all()
-        serializer = ManyToManyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
-            {'url': 'http://testserver/manytomanytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
-            {'url': 'http://testserver/manytomanytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/manytomanysource/3/']},
-            {'url': 'http://testserver/manytomanytarget/4/', 'name': 'target-4', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/3/']}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-
-class HyperlinkedForeignKeyTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
-    def setUp(self):
-        target = ForeignKeyTarget(name='target-1')
-        target.save()
-        new_target = ForeignKeyTarget(name='target-2')
-        new_target.save()
-        for idx in range(1, 4):
-            source = ForeignKeySource(name='source-%d' % idx, target=target)
-            source.save()
-
-    def test_foreign_key_retrieve(self):
-        queryset = ForeignKeySource.objects.all()
-        serializer = ForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/foreignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/foreignkeysource/3/', 'name': 'source-3', 'target': 'http://testserver/foreignkeytarget/1/'}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_reverse_foreign_key_retrieve(self):
-        queryset = ForeignKeyTarget.objects.all()
-        serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/2/', 'http://testserver/foreignkeysource/3/']},
-            {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': []},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_update(self):
-        data = {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/2/'}
-        instance = ForeignKeySource.objects.get(pk=1)
-        serializer = ForeignKeySourceSerializer(instance, data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        self.assertEqual(serializer.data, data)
-        serializer.save()
-
-        # Ensure source 1 is updated, and everything else is as expected
-        queryset = ForeignKeySource.objects.all()
-        serializer = ForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/2/'},
-            {'url': 'http://testserver/foreignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/foreignkeysource/3/', 'name': 'source-3', 'target': 'http://testserver/foreignkeytarget/1/'}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_update_incorrect_type(self):
-        data = {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 2}
-        instance = ForeignKeySource.objects.get(pk=1)
-        serializer = ForeignKeySourceSerializer(instance, data=data, context={'request': request})
-        self.assertFalse(serializer.is_valid())
-        self.assertEqual(serializer.errors, {'target': ['Incorrect type.  Expected url string, received int.']})
-
-    def test_reverse_foreign_key_update(self):
-        data = {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']}
-        instance = ForeignKeyTarget.objects.get(pk=2)
-        serializer = ForeignKeyTargetSerializer(instance, data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        # We shouldn't have saved anything to the db yet since save
-        # hasn't been called.
-        queryset = ForeignKeyTarget.objects.all()
-        new_serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/2/', 'http://testserver/foreignkeysource/3/']},
-            {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': []},
-        ]
-        self.assertEqual(new_serializer.data, expected)
-
-        serializer.save()
-        self.assertEqual(serializer.data, data)
-
-        # Ensure target 2 is update, and everything else is as expected
-        queryset = ForeignKeyTarget.objects.all()
-        serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/2/']},
-            {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_create(self):
-        data = {'url': 'http://testserver/foreignkeysource/4/', 'name': 'source-4', 'target': 'http://testserver/foreignkeytarget/2/'}
-        serializer = ForeignKeySourceSerializer(data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        obj = serializer.save()
-        self.assertEqual(serializer.data, data)
-        self.assertEqual(obj.name, 'source-4')
-
-        # Ensure source 1 is updated, and everything else is as expected
-        queryset = ForeignKeySource.objects.all()
-        serializer = ForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/foreignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/foreignkeysource/3/', 'name': 'source-3', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/foreignkeysource/4/', 'name': 'source-4', 'target': 'http://testserver/foreignkeytarget/2/'},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_reverse_foreign_key_create(self):
-        data = {'url': 'http://testserver/foreignkeytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']}
-        serializer = ForeignKeyTargetSerializer(data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        obj = serializer.save()
-        self.assertEqual(serializer.data, data)
-        self.assertEqual(obj.name, 'target-3')
-
-        # Ensure target 4 is added, and everything else is as expected
-        queryset = ForeignKeyTarget.objects.all()
-        serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/2/']},
-            {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': []},
-            {'url': 'http://testserver/foreignkeytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_update_with_invalid_null(self):
-        data = {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': None}
-        instance = ForeignKeySource.objects.get(pk=1)
-        serializer = ForeignKeySourceSerializer(instance, data=data, context={'request': request})
-        self.assertFalse(serializer.is_valid())
-        self.assertEqual(serializer.errors, {'target': ['This field is required.']})
-
-
-class HyperlinkedNullableForeignKeyTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
-    def setUp(self):
-        target = ForeignKeyTarget(name='target-1')
-        target.save()
-        for idx in range(1, 4):
-            if idx == 3:
-                target = None
-            source = NullableForeignKeySource(name='source-%d' % idx, target=target)
-            source.save()
-
-    def test_foreign_key_retrieve_with_null(self):
-        queryset = NullableForeignKeySource.objects.all()
-        serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_create_with_valid_null(self):
-        data = {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
-        serializer = NullableForeignKeySourceSerializer(data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        obj = serializer.save()
-        self.assertEqual(serializer.data, data)
-        self.assertEqual(obj.name, 'source-4')
-
-        # Ensure source 4 is created, and everything else is as expected
-        queryset = NullableForeignKeySource.objects.all()
-        serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
-            {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_create_with_valid_emptystring(self):
-        """
-        The emptystring should be interpreted as null in the context
-        of relationships.
-        """
-        data = {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': ''}
-        expected_data = {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
-        serializer = NullableForeignKeySourceSerializer(data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        obj = serializer.save()
-        self.assertEqual(serializer.data, expected_data)
-        self.assertEqual(obj.name, 'source-4')
-
-        # Ensure source 4 is created, and everything else is as expected
-        queryset = NullableForeignKeySource.objects.all()
-        serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
-            {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_update_with_valid_null(self):
-        data = {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None}
-        instance = NullableForeignKeySource.objects.get(pk=1)
-        serializer = NullableForeignKeySourceSerializer(instance, data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        self.assertEqual(serializer.data, data)
-        serializer.save()
-
-        # Ensure source 1 is updated, and everything else is as expected
-        queryset = NullableForeignKeySource.objects.all()
-        serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None},
-            {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    def test_foreign_key_update_with_valid_emptystring(self):
-        """
-        The emptystring should be interpreted as null in the context
-        of relationships.
-        """
-        data = {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': ''}
-        expected_data = {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None}
-        instance = NullableForeignKeySource.objects.get(pk=1)
-        serializer = NullableForeignKeySourceSerializer(instance, data=data, context={'request': request})
-        self.assertTrue(serializer.is_valid())
-        self.assertEqual(serializer.data, expected_data)
-        serializer.save()
-
-        # Ensure source 1 is updated, and everything else is as expected
-        queryset = NullableForeignKeySource.objects.all()
-        serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None},
-            {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
-            {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-    # reverse foreign keys MUST be read_only
-    # In the general case they do not provide .remove() or .clear()
-    # and cannot be arbitrarily set.
-
-    # def test_reverse_foreign_key_update(self):
-    #     data = {'id': 1, 'name': 'target-1', 'sources': [1]}
-    #     instance = ForeignKeyTarget.objects.get(pk=1)
-    #     serializer = ForeignKeyTargetSerializer(instance, data=data)
-    #     self.assertTrue(serializer.is_valid())
-    #     self.assertEqual(serializer.data, data)
-    #     serializer.save()
-
-    #     # Ensure target 1 is updated, and everything else is as expected
-    #     queryset = ForeignKeyTarget.objects.all()
-    #     serializer = ForeignKeyTargetSerializer(queryset, many=True)
-    #     expected = [
-    #         {'id': 1, 'name': 'target-1', 'sources': [1]},
-    #         {'id': 2, 'name': 'target-2', 'sources': []},
-    #     ]
-    #     self.assertEqual(serializer.data, expected)
-
-
-class HyperlinkedNullableOneToOneTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
-    def setUp(self):
-        target = OneToOneTarget(name='target-1')
-        target.save()
-        new_target = OneToOneTarget(name='target-2')
-        new_target.save()
-        source = NullableOneToOneSource(name='source-1', target=target)
-        source.save()
-
-    def test_reverse_foreign_key_retrieve_with_null(self):
-        queryset = OneToOneTarget.objects.all()
-        serializer = NullableOneToOneTargetSerializer(queryset, many=True, context={'request': request})
-        expected = [
-            {'url': 'http://testserver/onetoonetarget/1/', 'name': 'target-1', 'nullable_source': 'http://testserver/nullableonetoonesource/1/'},
-            {'url': 'http://testserver/onetoonetarget/2/', 'name': 'target-2', 'nullable_source': None},
-        ]
-        self.assertEqual(serializer.data, expected)
-
-
-# Regression tests for #694 (`source` attribute on related fields)
-
-class HyperlinkedRelatedFieldSourceTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
-    def test_related_manager_source(self):
-        """
-        Relational fields should be able to use manager-returning methods as their source.
-        """
-        BlogPost.objects.create(title='blah')
-        field = serializers.HyperlinkedRelatedField(
-            many=True,
-            source='get_blogposts_manager',
-            view_name='dummy-url',
-        )
-        field.context = {'request': request}
-
-        class ClassWithManagerMethod(object):
-            def get_blogposts_manager(self):
-                return BlogPost.objects
-
-        obj = ClassWithManagerMethod()
-        value = field.field_to_native(obj, 'field_name')
-        self.assertEqual(value, ['http://testserver/dummyurl/1/'])
-
-    def test_related_queryset_source(self):
-        """
-        Relational fields should be able to use queryset-returning methods as their source.
-        """
-        BlogPost.objects.create(title='blah')
-        field = serializers.HyperlinkedRelatedField(
-            many=True,
-            source='get_blogposts_queryset',
-            view_name='dummy-url',
-        )
-        field.context = {'request': request}
-
-        class ClassWithQuerysetMethod(object):
-            def get_blogposts_queryset(self):
-                return BlogPost.objects.all()
-
-        obj = ClassWithQuerysetMethod()
-        value = field.field_to_native(obj, 'field_name')
-        self.assertEqual(value, ['http://testserver/dummyurl/1/'])
-
-    def test_dotted_source(self):
-        """
-        Source argument should support dotted.source notation.
-        """
-        BlogPost.objects.create(title='blah')
-        field = serializers.HyperlinkedRelatedField(
-            many=True,
-            source='a.b.c',
-            view_name='dummy-url',
-        )
-        field.context = {'request': request}
-
-        class ClassWithQuerysetMethod(object):
-            a = {
-                'b': {
-                    'c': BlogPost.objects.all()
-                }
-            }
-
-        obj = ClassWithQuerysetMethod()
-        value = field.field_to_native(obj, 'field_name')
-        self.assertEqual(value, ['http://testserver/dummyurl/1/'])
+# from __future__ import unicode_literals
+# from django.conf.urls import patterns, url
+# from django.test import TestCase
+# from rest_framework import serializers
+# from rest_framework.test import APIRequestFactory
+# from tests.models import (
+#     BlogPost,
+#     ManyToManyTarget, ManyToManySource, ForeignKeyTarget, ForeignKeySource,
+#     NullableForeignKeySource, OneToOneTarget, NullableOneToOneSource
+# )
+
+# factory = APIRequestFactory()
+# request = factory.get('/')  # Just to ensure we have a request in the serializer context
+
+
+# def dummy_view(request, pk):
+#     pass
+
+# urlpatterns = patterns(
+#     '',
+#     url(r'^dummyurl/(?P<pk>[0-9]+)/$', dummy_view, name='dummy-url'),
+#     url(r'^manytomanysource/(?P<pk>[0-9]+)/$', dummy_view, name='manytomanysource-detail'),
+#     url(r'^manytomanytarget/(?P<pk>[0-9]+)/$', dummy_view, name='manytomanytarget-detail'),
+#     url(r'^foreignkeysource/(?P<pk>[0-9]+)/$', dummy_view, name='foreignkeysource-detail'),
+#     url(r'^foreignkeytarget/(?P<pk>[0-9]+)/$', dummy_view, name='foreignkeytarget-detail'),
+#     url(r'^nullableforeignkeysource/(?P<pk>[0-9]+)/$', dummy_view, name='nullableforeignkeysource-detail'),
+#     url(r'^onetoonetarget/(?P<pk>[0-9]+)/$', dummy_view, name='onetoonetarget-detail'),
+#     url(r'^nullableonetoonesource/(?P<pk>[0-9]+)/$', dummy_view, name='nullableonetoonesource-detail'),
+# )
+
+
+# # ManyToMany
+# class ManyToManyTargetSerializer(serializers.HyperlinkedModelSerializer):
+#     class Meta:
+#         model = ManyToManyTarget
+#         fields = ('url', 'name', 'sources')
+
+
+# class ManyToManySourceSerializer(serializers.HyperlinkedModelSerializer):
+#     class Meta:
+#         model = ManyToManySource
+#         fields = ('url', 'name', 'targets')
+
+
+# # ForeignKey
+# class ForeignKeyTargetSerializer(serializers.HyperlinkedModelSerializer):
+#     class Meta:
+#         model = ForeignKeyTarget
+#         fields = ('url', 'name', 'sources')
+
+
+# class ForeignKeySourceSerializer(serializers.HyperlinkedModelSerializer):
+#     class Meta:
+#         model = ForeignKeySource
+#         fields = ('url', 'name', 'target')
+
+
+# # Nullable ForeignKey
+# class NullableForeignKeySourceSerializer(serializers.HyperlinkedModelSerializer):
+#     class Meta:
+#         model = NullableForeignKeySource
+#         fields = ('url', 'name', 'target')
+
+
+# # Nullable OneToOne
+# class NullableOneToOneTargetSerializer(serializers.HyperlinkedModelSerializer):
+#     class Meta:
+#         model = OneToOneTarget
+#         fields = ('url', 'name', 'nullable_source')
+
+
+# # TODO: Add test that .data cannot be accessed prior to .is_valid
+
+# class HyperlinkedManyToManyTests(TestCase):
+#     urls = 'tests.test_relations_hyperlink'
+
+#     def setUp(self):
+#         for idx in range(1, 4):
+#             target = ManyToManyTarget(name='target-%d' % idx)
+#             target.save()
+#             source = ManyToManySource(name='source-%d' % idx)
+#             source.save()
+#             for target in ManyToManyTarget.objects.all():
+#                 source.targets.add(target)
+
+#     def test_many_to_many_retrieve(self):
+#         queryset = ManyToManySource.objects.all()
+#         serializer = ManyToManySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/']},
+#             {'url': 'http://testserver/manytomanysource/2/', 'name': 'source-2', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/']},
+#             {'url': 'http://testserver/manytomanysource/3/', 'name': 'source-3', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_reverse_many_to_many_retrieve(self):
+#         queryset = ManyToManyTarget.objects.all()
+#         serializer = ManyToManyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
+#             {'url': 'http://testserver/manytomanytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
+#             {'url': 'http://testserver/manytomanytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/manytomanysource/3/']}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_many_to_many_update(self):
+#         data = {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']}
+#         instance = ManyToManySource.objects.get(pk=1)
+#         serializer = ManyToManySourceSerializer(instance, data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         serializer.save()
+#         self.assertEqual(serializer.data, data)
+
+#         # Ensure source 1 is updated, and everything else is as expected
+#         queryset = ManyToManySource.objects.all()
+#         serializer = ManyToManySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']},
+#             {'url': 'http://testserver/manytomanysource/2/', 'name': 'source-2', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/']},
+#             {'url': 'http://testserver/manytomanysource/3/', 'name': 'source-3', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_reverse_many_to_many_update(self):
+#         data = {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/']}
+#         instance = ManyToManyTarget.objects.get(pk=1)
+#         serializer = ManyToManyTargetSerializer(instance, data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         serializer.save()
+#         self.assertEqual(serializer.data, data)
+
+#         # Ensure target 1 is updated, and everything else is as expected
+#         queryset = ManyToManyTarget.objects.all()
+#         serializer = ManyToManyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/']},
+#             {'url': 'http://testserver/manytomanytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
+#             {'url': 'http://testserver/manytomanytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/manytomanysource/3/']}
+
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_many_to_many_create(self):
+#         data = {'url': 'http://testserver/manytomanysource/4/', 'name': 'source-4', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/3/']}
+#         serializer = ManyToManySourceSerializer(data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         obj = serializer.save()
+#         self.assertEqual(serializer.data, data)
+#         self.assertEqual(obj.name, 'source-4')
+
+#         # Ensure source 4 is added, and everything else is as expected
+#         queryset = ManyToManySource.objects.all()
+#         serializer = ManyToManySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/manytomanysource/1/', 'name': 'source-1', 'targets': ['http://testserver/manytomanytarget/1/']},
+#             {'url': 'http://testserver/manytomanysource/2/', 'name': 'source-2', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/']},
+#             {'url': 'http://testserver/manytomanysource/3/', 'name': 'source-3', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/2/', 'http://testserver/manytomanytarget/3/']},
+#             {'url': 'http://testserver/manytomanysource/4/', 'name': 'source-4', 'targets': ['http://testserver/manytomanytarget/1/', 'http://testserver/manytomanytarget/3/']}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_reverse_many_to_many_create(self):
+#         data = {'url': 'http://testserver/manytomanytarget/4/', 'name': 'target-4', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/3/']}
+#         serializer = ManyToManyTargetSerializer(data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         obj = serializer.save()
+#         self.assertEqual(serializer.data, data)
+#         self.assertEqual(obj.name, 'target-4')
+
+#         # Ensure target 4 is added, and everything else is as expected
+#         queryset = ManyToManyTarget.objects.all()
+#         serializer = ManyToManyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/manytomanytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
+#             {'url': 'http://testserver/manytomanytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/manytomanysource/2/', 'http://testserver/manytomanysource/3/']},
+#             {'url': 'http://testserver/manytomanytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/manytomanysource/3/']},
+#             {'url': 'http://testserver/manytomanytarget/4/', 'name': 'target-4', 'sources': ['http://testserver/manytomanysource/1/', 'http://testserver/manytomanysource/3/']}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+
+# class HyperlinkedForeignKeyTests(TestCase):
+#     urls = 'tests.test_relations_hyperlink'
+
+#     def setUp(self):
+#         target = ForeignKeyTarget(name='target-1')
+#         target.save()
+#         new_target = ForeignKeyTarget(name='target-2')
+#         new_target.save()
+#         for idx in range(1, 4):
+#             source = ForeignKeySource(name='source-%d' % idx, target=target)
+#             source.save()
+
+#     def test_foreign_key_retrieve(self):
+#         queryset = ForeignKeySource.objects.all()
+#         serializer = ForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/foreignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/foreignkeysource/3/', 'name': 'source-3', 'target': 'http://testserver/foreignkeytarget/1/'}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_reverse_foreign_key_retrieve(self):
+#         queryset = ForeignKeyTarget.objects.all()
+#         serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/2/', 'http://testserver/foreignkeysource/3/']},
+#             {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': []},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_update(self):
+#         data = {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/2/'}
+#         instance = ForeignKeySource.objects.get(pk=1)
+#         serializer = ForeignKeySourceSerializer(instance, data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         self.assertEqual(serializer.data, data)
+#         serializer.save()
+
+#         # Ensure source 1 is updated, and everything else is as expected
+#         queryset = ForeignKeySource.objects.all()
+#         serializer = ForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/2/'},
+#             {'url': 'http://testserver/foreignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/foreignkeysource/3/', 'name': 'source-3', 'target': 'http://testserver/foreignkeytarget/1/'}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_update_incorrect_type(self):
+#         data = {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 2}
+#         instance = ForeignKeySource.objects.get(pk=1)
+#         serializer = ForeignKeySourceSerializer(instance, data=data, context={'request': request})
+#         self.assertFalse(serializer.is_valid())
+#         self.assertEqual(serializer.errors, {'target': ['Incorrect type.  Expected url string, received int.']})
+
+#     def test_reverse_foreign_key_update(self):
+#         data = {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']}
+#         instance = ForeignKeyTarget.objects.get(pk=2)
+#         serializer = ForeignKeyTargetSerializer(instance, data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         # We shouldn't have saved anything to the db yet since save
+#         # hasn't been called.
+#         queryset = ForeignKeyTarget.objects.all()
+#         new_serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/2/', 'http://testserver/foreignkeysource/3/']},
+#             {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': []},
+#         ]
+#         self.assertEqual(new_serializer.data, expected)
+
+#         serializer.save()
+#         self.assertEqual(serializer.data, data)
+
+#         # Ensure target 2 is update, and everything else is as expected
+#         queryset = ForeignKeyTarget.objects.all()
+#         serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/2/']},
+#             {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_create(self):
+#         data = {'url': 'http://testserver/foreignkeysource/4/', 'name': 'source-4', 'target': 'http://testserver/foreignkeytarget/2/'}
+#         serializer = ForeignKeySourceSerializer(data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         obj = serializer.save()
+#         self.assertEqual(serializer.data, data)
+#         self.assertEqual(obj.name, 'source-4')
+
+#         # Ensure source 1 is updated, and everything else is as expected
+#         queryset = ForeignKeySource.objects.all()
+#         serializer = ForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/foreignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/foreignkeysource/3/', 'name': 'source-3', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/foreignkeysource/4/', 'name': 'source-4', 'target': 'http://testserver/foreignkeytarget/2/'},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_reverse_foreign_key_create(self):
+#         data = {'url': 'http://testserver/foreignkeytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']}
+#         serializer = ForeignKeyTargetSerializer(data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         obj = serializer.save()
+#         self.assertEqual(serializer.data, data)
+#         self.assertEqual(obj.name, 'target-3')
+
+#         # Ensure target 4 is added, and everything else is as expected
+#         queryset = ForeignKeyTarget.objects.all()
+#         serializer = ForeignKeyTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/foreignkeytarget/1/', 'name': 'target-1', 'sources': ['http://testserver/foreignkeysource/2/']},
+#             {'url': 'http://testserver/foreignkeytarget/2/', 'name': 'target-2', 'sources': []},
+#             {'url': 'http://testserver/foreignkeytarget/3/', 'name': 'target-3', 'sources': ['http://testserver/foreignkeysource/1/', 'http://testserver/foreignkeysource/3/']},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_update_with_invalid_null(self):
+#         data = {'url': 'http://testserver/foreignkeysource/1/', 'name': 'source-1', 'target': None}
+#         instance = ForeignKeySource.objects.get(pk=1)
+#         serializer = ForeignKeySourceSerializer(instance, data=data, context={'request': request})
+#         self.assertFalse(serializer.is_valid())
+#         self.assertEqual(serializer.errors, {'target': ['This field is required.']})
+
+
+# class HyperlinkedNullableForeignKeyTests(TestCase):
+#     urls = 'tests.test_relations_hyperlink'
+
+#     def setUp(self):
+#         target = ForeignKeyTarget(name='target-1')
+#         target.save()
+#         for idx in range(1, 4):
+#             if idx == 3:
+#                 target = None
+#             source = NullableForeignKeySource(name='source-%d' % idx, target=target)
+#             source.save()
+
+#     def test_foreign_key_retrieve_with_null(self):
+#         queryset = NullableForeignKeySource.objects.all()
+#         serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_create_with_valid_null(self):
+#         data = {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
+#         serializer = NullableForeignKeySourceSerializer(data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         obj = serializer.save()
+#         self.assertEqual(serializer.data, data)
+#         self.assertEqual(obj.name, 'source-4')
+
+#         # Ensure source 4 is created, and everything else is as expected
+#         queryset = NullableForeignKeySource.objects.all()
+#         serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
+#             {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_create_with_valid_emptystring(self):
+#         """
+#         The emptystring should be interpreted as null in the context
+#         of relationships.
+#         """
+#         data = {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': ''}
+#         expected_data = {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
+#         serializer = NullableForeignKeySourceSerializer(data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         obj = serializer.save()
+#         self.assertEqual(serializer.data, expected_data)
+#         self.assertEqual(obj.name, 'source-4')
+
+#         # Ensure source 4 is created, and everything else is as expected
+#         queryset = NullableForeignKeySource.objects.all()
+#         serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
+#             {'url': 'http://testserver/nullableforeignkeysource/4/', 'name': 'source-4', 'target': None}
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_update_with_valid_null(self):
+#         data = {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None}
+#         instance = NullableForeignKeySource.objects.get(pk=1)
+#         serializer = NullableForeignKeySourceSerializer(instance, data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         self.assertEqual(serializer.data, data)
+#         serializer.save()
+
+#         # Ensure source 1 is updated, and everything else is as expected
+#         queryset = NullableForeignKeySource.objects.all()
+#         serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None},
+#             {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     def test_foreign_key_update_with_valid_emptystring(self):
+#         """
+#         The emptystring should be interpreted as null in the context
+#         of relationships.
+#         """
+#         data = {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': ''}
+#         expected_data = {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None}
+#         instance = NullableForeignKeySource.objects.get(pk=1)
+#         serializer = NullableForeignKeySourceSerializer(instance, data=data, context={'request': request})
+#         self.assertTrue(serializer.is_valid())
+#         self.assertEqual(serializer.data, expected_data)
+#         serializer.save()
+
+#         # Ensure source 1 is updated, and everything else is as expected
+#         queryset = NullableForeignKeySource.objects.all()
+#         serializer = NullableForeignKeySourceSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/nullableforeignkeysource/1/', 'name': 'source-1', 'target': None},
+#             {'url': 'http://testserver/nullableforeignkeysource/2/', 'name': 'source-2', 'target': 'http://testserver/foreignkeytarget/1/'},
+#             {'url': 'http://testserver/nullableforeignkeysource/3/', 'name': 'source-3', 'target': None},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+#     # reverse foreign keys MUST be read_only
+#     # In the general case they do not provide .remove() or .clear()
+#     # and cannot be arbitrarily set.
+
+#     # def test_reverse_foreign_key_update(self):
+#     #     data = {'id': 1, 'name': 'target-1', 'sources': [1]}
+#     #     instance = ForeignKeyTarget.objects.get(pk=1)
+#     #     serializer = ForeignKeyTargetSerializer(instance, data=data)
+#     #     self.assertTrue(serializer.is_valid())
+#     #     self.assertEqual(serializer.data, data)
+#     #     serializer.save()
+
+#     #     # Ensure target 1 is updated, and everything else is as expected
+#     #     queryset = ForeignKeyTarget.objects.all()
+#     #     serializer = ForeignKeyTargetSerializer(queryset, many=True)
+#     #     expected = [
+#     #         {'id': 1, 'name': 'target-1', 'sources': [1]},
+#     #         {'id': 2, 'name': 'target-2', 'sources': []},
+#     #     ]
+#     #     self.assertEqual(serializer.data, expected)
+
+
+# class HyperlinkedNullableOneToOneTests(TestCase):
+#     urls = 'tests.test_relations_hyperlink'
+
+#     def setUp(self):
+#         target = OneToOneTarget(name='target-1')
+#         target.save()
+#         new_target = OneToOneTarget(name='target-2')
+#         new_target.save()
+#         source = NullableOneToOneSource(name='source-1', target=target)
+#         source.save()
+
+#     def test_reverse_foreign_key_retrieve_with_null(self):
+#         queryset = OneToOneTarget.objects.all()
+#         serializer = NullableOneToOneTargetSerializer(queryset, many=True, context={'request': request})
+#         expected = [
+#             {'url': 'http://testserver/onetoonetarget/1/', 'name': 'target-1', 'nullable_source': 'http://testserver/nullableonetoonesource/1/'},
+#             {'url': 'http://testserver/onetoonetarget/2/', 'name': 'target-2', 'nullable_source': None},
+#         ]
+#         self.assertEqual(serializer.data, expected)
+
+
+# # Regression tests for #694 (`source` attribute on related fields)
+
+# class HyperlinkedRelatedFieldSourceTests(TestCase):
+#     urls = 'tests.test_relations_hyperlink'
+
+#     def test_related_manager_source(self):
+#         """
+#         Relational fields should be able to use manager-returning methods as their source.
+#         """
+#         BlogPost.objects.create(title='blah')
+#         field = serializers.HyperlinkedRelatedField(
+#             many=True,
+#             source='get_blogposts_manager',
+#             view_name='dummy-url',
+#         )
+#         field.context = {'request': request}
+
+#         class ClassWithManagerMethod(object):
+#             def get_blogposts_manager(self):
+#                 return BlogPost.objects
+
+#         obj = ClassWithManagerMethod()
+#         value = field.field_to_native(obj, 'field_name')
+#         self.assertEqual(value, ['http://testserver/dummyurl/1/'])
+
+#     def test_related_queryset_source(self):
+#         """
+#         Relational fields should be able to use queryset-returning methods as their source.
+#         """
+#         BlogPost.objects.create(title='blah')
+#         field = serializers.HyperlinkedRelatedField(
+#             many=True,
+#             source='get_blogposts_queryset',
+#             view_name='dummy-url',
+#         )
+#         field.context = {'request': request}
+
+#         class ClassWithQuerysetMethod(object):
+#             def get_blogposts_queryset(self):
+#                 return BlogPost.objects.all()
+
+#         obj = ClassWithQuerysetMethod()
+#         value = field.field_to_native(obj, 'field_name')
+#         self.assertEqual(value, ['http://testserver/dummyurl/1/'])
+
+#     def test_dotted_source(self):
+#         """
+#         Source argument should support dotted.source notation.
+#         """
+#         BlogPost.objects.create(title='blah')
+#         field = serializers.HyperlinkedRelatedField(
+#             many=True,
+#             source='a.b.c',
+#             view_name='dummy-url',
+#         )
+#         field.context = {'request': request}
+
+#         class ClassWithQuerysetMethod(object):
+#             a = {
+#                 'b': {
+#                     'c': BlogPost.objects.all()
+#                 }
+#             }
+
+#         obj = ClassWithQuerysetMethod()
+#         value = field.field_to_native(obj, 'field_name')
+#         self.assertEqual(value, ['http://testserver/dummyurl/1/'])