Revert accidental merge.

2 files changed, 8 insertions, 177 deletions

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index a84370e9..27458f96 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -93,7 +93,7 @@ class SerializerOptions(object):
         self.exclude = getattr(meta, 'exclude', ())
 
 
-class BaseSerializer(WritableField):
+class BaseSerializer(Field):
     class Meta(object):
         pass
 
@@ -118,7 +118,6 @@ class BaseSerializer(WritableField):
         self._data = None
         self._files = None
         self._errors = None
-        self._delete = False
 
     #####
     # Methods to determine which fields to use when (de)serializing objects.
@@ -219,10 +218,7 @@ class BaseSerializer(WritableField):
             try:
                 field.field_from_native(data, files, field_name, reverted_data)
             except ValidationError as err:
-                if hasattr(err, 'message_dict'):
-                    self._errors[field_name] = [err.message_dict]
-                else:
-                    self._errors[field_name] = list(err.messages)
+                self._errors[field_name] = list(err.messages)
 
         return reverted_data
 
@@ -373,35 +369,6 @@ class ModelSerializer(Serializer):
     """
     _options_class = ModelSerializerOptions
 
-    def field_from_native(self, data, files, field_name, into):
-        if self.read_only:
-            return
-
-        try:
-            value = data[field_name]
-        except KeyError:
-            if self.required:
-                raise ValidationError(self.error_messages['required'])
-            return
-
-        if self.parent.object:
-            # Set the serializer object if it exists
-            pk_field_name = self.opts.model._meta.pk.name
-            obj = getattr(self.parent.object, field_name)
-            self.object = obj
-
-        if value in (None, ''):
-            self._delete = True
-            into[(self.source or field_name)] = self
-        else:
-            obj = self.from_native(value, files)
-            if not self._errors:
-                self.object = obj
-                into[self.source or field_name] = self
-            else:
-                # Propagate errors up to our parent
-                raise ValidationError(self._errors)
-
     def get_default_fields(self):
         """
         Return all the fields that should be serialized for the model.
@@ -575,13 +542,10 @@ class ModelSerializer(Serializer):
 
         return instance
 
-    def _save(self, parent=None, fk_field=None):
-        if self._delete:
-            self.object.delete()
-            return
-
-        if parent and fk_field:
-            setattr(self.object, fk_field, parent)
+    def save(self):
+        """
+        Save the deserialized object and return it.
+        """
         self.object.save()
 
         if getattr(self, 'm2m_data', None):
@@ -591,18 +555,9 @@ class ModelSerializer(Serializer):
 
         if getattr(self, 'related_data', None):
             for accessor_name, object_list in self.related_data.items():
-                if isinstance(object_list, ModelSerializer):
-                    fk_field = self.object._meta.get_field_by_name(accessor_name)[0].field.name
-                    object_list._save(parent=self.object, fk_field=fk_field)
-                else:
-                    setattr(self.object, accessor_name, object_list)
+                setattr(self.object, accessor_name, object_list)
             self.related_data = {}
-            
-    def save(self):
-        """
-        Save the deserialized object and return it.
-        """
-        self._save()
+
         return self.object
 
 
diff --git a/rest_framework/tests/nesting.py b/rest_framework/tests/nesting.py
deleted file mode 100644
index e4e32667..00000000
--- a/rest_framework/tests/nesting.py
+++ /dev/null
@@ -1,124 +0,0 @@
-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)