1 files changed, 124 insertions, 0 deletions
diff --git a/rest_framework/tests/nesting.py b/rest_framework/tests/nesting.py
new file mode 100644
index 00000000..e4e32667
--- /dev/null
+++ b/rest_framework/tests/nesting.py
@@ -0,0 +1,124 @@
+from django.db import models
+from django.test import TestCase
+from rest_framework import serializers
+
+
+class OneToOneTarget(models.Model):
+    name = models.CharField(max_length=100)
+
+
+class OneToOneTargetSource(models.Model):
+    name = models.CharField(max_length=100)
+    target = models.OneToOneField(OneToOneTarget, null=True, blank=True,
+                                  related_name='target_source')
+
+
+class OneToOneSource(models.Model):
+    name = models.CharField(max_length=100)
+    target_source = models.OneToOneField(OneToOneTargetSource, related_name='source')
+
+
+class OneToOneSourceSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = OneToOneSource
+        exclude = ('target_source', )
+
+
+class OneToOneTargetSourceSerializer(serializers.ModelSerializer):
+    source = OneToOneSourceSerializer()
+
+    class Meta:
+        model = OneToOneTargetSource
+        exclude = ('target', )
+
+class OneToOneTargetSerializer(serializers.ModelSerializer):
+    target_source = OneToOneTargetSourceSerializer()
+
+    class Meta:
+        model = OneToOneTarget
+
+
+class NestedOneToOneTests(TestCase):
+    def setUp(self):
+        for idx in range(1, 4):
+            target = OneToOneTarget(name='target-%d' % idx)
+            target.save()
+            target_source = OneToOneTargetSource(name='target-source-%d' % idx, target=target)
+            target_source.save()
+            source = OneToOneSource(name='source-%d' % idx, target_source=target_source)
+            source.save()
+
+    def test_one_to_one_retrieve(self):
+        queryset = OneToOneTarget.objects.all()
+        serializer = OneToOneTargetSerializer(queryset)
+        expected = [
+            {'id': 1, 'name': u'target-1', 'target_source': {'id': 1, 'name': u'target-source-1', 'source': {'id': 1, 'name': u'source-1'}}},
+            {'id': 2, 'name': u'target-2', 'target_source': {'id': 2, 'name': u'target-source-2', 'source': {'id': 2, 'name': u'source-2'}}},
+            {'id': 3, 'name': u'target-3', 'target_source': {'id': 3, 'name': u'target-source-3', 'source': {'id': 3, 'name': u'source-3'}}}            
+        ]
+        self.assertEquals(serializer.data, expected)
+        
+
+    def test_one_to_one_create(self):
+        data = {'id': 4, 'name': u'target-4', 'target_source': {'id': 4, 'name': u'target-source-4', 'source': {'id': 4, 'name': u'source-4'}}}
+        serializer = OneToOneTargetSerializer(data=data)
+        self.assertTrue(serializer.is_valid())
+        obj = serializer.save()
+        self.assertEquals(serializer.data, data)
+        self.assertEqual(obj.name, u'target-4')
+
+        # Ensure (target 4, target_source 4, source 4) are added, and
+        # everything else is as expected.
+        queryset = OneToOneTarget.objects.all()
+        serializer = OneToOneTargetSerializer(queryset)
+        expected = [
+            {'id': 1, 'name': u'target-1', 'target_source': {'id': 1, 'name': u'target-source-1', 'source': {'id': 1, 'name': u'source-1'}}},
+            {'id': 2, 'name': u'target-2', 'target_source': {'id': 2, 'name': u'target-source-2', 'source': {'id': 2, 'name': u'source-2'}}},
+            {'id': 3, 'name': u'target-3', 'target_source': {'id': 3, 'name': u'target-source-3', 'source': {'id': 3, 'name': u'source-3'}}},
+            {'id': 4, 'name': u'target-4', 'target_source': {'id': 4, 'name': u'target-source-4', 'source': {'id': 4, 'name': u'source-4'}}}
+        ]
+        self.assertEquals(serializer.data, expected)
+
+    def test_one_to_one_create_with_invalid_data(self):
+        data = {'id': 4, 'name': u'target-4', 'target_source': {'id': 4, 'name': u'target-source-4', 'source': {'id': 4}}}
+        serializer = OneToOneTargetSerializer(data=data)
+        self.assertFalse(serializer.is_valid())
+        self.assertEquals(serializer.errors, {'target_source': [{'source': [{'name': [u'This field is required.']}]}]})
+
+    def test_one_to_one_update(self):
+        data = {'id': 3, 'name': u'target-3-updated', 'target_source': {'id': 3, 'name': u'target-source-3-updated', 'source': {'id': 3, 'name': u'source-3-updated'}}}
+        instance = OneToOneTarget.objects.get(pk=3)
+        serializer = OneToOneTargetSerializer(instance, data=data)
+        self.assertTrue(serializer.is_valid())
+        obj = serializer.save()
+        self.assertEquals(serializer.data, data)
+        self.assertEqual(obj.name, u'target-3-updated')
+
+        # Ensure (target 3, target_source 3, source 3) are updated,
+        # and everything else is as expected.
+        queryset = OneToOneTarget.objects.all()
+        serializer = OneToOneTargetSerializer(queryset)
+        expected = [
+            {'id': 1, 'name': u'target-1', 'target_source': {'id': 1, 'name': u'target-source-1', 'source': {'id': 1, 'name': u'source-1'}}},
+            {'id': 2, 'name': u'target-2', 'target_source': {'id': 2, 'name': u'target-source-2', 'source': {'id': 2, 'name': u'source-2'}}},
+            {'id': 3, 'name': u'target-3-updated', 'target_source': {'id': 3, 'name': u'target-source-3-updated', 'source': {'id': 3, 'name': u'source-3-updated'}}}
+        ]
+        self.assertEquals(serializer.data, expected)
+
+    def test_one_to_one_delete(self):
+        data = {'id': 3, 'name': u'target-3', 'target_source': None}
+        instance = OneToOneTarget.objects.get(pk=3)
+        serializer = OneToOneTargetSerializer(instance, data=data)
+        self.assertTrue(serializer.is_valid())
+        obj = serializer.save()
+
+        # Ensure (target_source 3, source 3) are deleted,
+        # and everything else is as expected.
+        queryset = OneToOneTarget.objects.all()
+        serializer = OneToOneTargetSerializer(queryset)
+        expected = [
+            {'id': 1, 'name': u'target-1', 'target_source': {'id': 1, 'name': u'target-source-1', 'source': {'id': 1, 'name': u'source-1'}}},
+            {'id': 2, 'name': u'target-2', 'target_source': {'id': 2, 'name': u'target-source-2', 'source': {'id': 2, 'name': u'source-2'}}},
+            {'id': 3, 'name': u'target-3', 'target_source': None}
+        ]
+        self.assertEquals(serializer.data, expected)