diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py index f4338626a..50ef7336b 100644 --- a/rest_framework/serializers.py +++ b/rest_framework/serializers.py @@ -110,19 +110,21 @@ class BaseSerializer(WritableField): _dict_class = SortedDictWithMetadata def __init__(self, instance=None, data=None, files=None, - context=None, partial=False, many=None, source=None): + context=None, partial=False, many=None, source=None, required=True): super(BaseSerializer, self).__init__(source=source) self.opts = self._options_class(self.Meta) self.parent = None self.root = None self.partial = partial self.many = many + self.required = required self.context = context or {} self.init_data = data self.init_files = files self.object = instance + self.unused_objects = instance self.fields = self.get_fields() self._data = None @@ -284,6 +286,19 @@ class BaseSerializer(WritableField): ret.fields[key] = field return ret + def _get_object_from_data(self, data): + """ + Get the corresponding object to deserialize the data into. + """ + # Just get the first object in the list. + if self.unused_objects: + obj = self.unused_objects[0] + self.unused_objects.remove(obj) + else: + obj = None + + return obj + def from_native(self, data, files): """ Deserialize primitives -> objects. @@ -356,9 +371,20 @@ class BaseSerializer(WritableField): if many: ret = [] errors = [] + siblings = [] for item in data: - ret.append(self.from_native(item, None)) - errors.append(self._errors) + obj = self._get_object_from_data(item) + sibling = self.__class__(obj, data=item) + siblings.append(sibling) + sibling.object = sibling.from_native(item, None) + ret.append(sibling.from_native(item, None)) + errors.append(sibling._errors) + # Unused objects will be deleted + for item in self.unused_objects or []: + sibling = self.__class__(item) + sibling._delete = True + siblings.append(sibling) + self._siblings = siblings self._errors = any(errors) and errors or [] else: ret = self.from_native(data, files) @@ -450,6 +476,27 @@ class ModelSerializer(Serializer): models.ImageField: ImageField, } + def _get_object_from_data(self, data): + """ + Get the corresponding object to deserialize the data into. + """ + if self.unused_objects is None: return None + + # Get the object based on pk + pk_field_name = self.opts.model._meta.pk.name + pk = data.get(pk_field_name, None) + if pk: + # Loop through objects and find one with pk or return None + obj = [o for o in self.unused_objects if o.pk == pk] + if obj: + obj = obj[0] + self.unused_objects.remove(obj) + else: + obj = None + return obj + else: + return None + def field_from_native(self, data, files, field_name, into): if self.read_only: return @@ -464,15 +511,39 @@ class ModelSerializer(Serializer): if self.parent.object: # Set the serializer object if it exists obj = getattr(self.parent.object, field_name) + if is_simple_callable(getattr(obj, 'all', None)): + # If this is a relational manager we just want the objects + obj = list(obj.all()) self.object = obj + self.unused_objects = obj if value in (None, ''): self._delete = True into[(self.source or field_name)] = self else: - obj = self.from_native(value, files) + if self.many: + ret = [] + errors = [] + siblings = [] + for item in value: + obj = self._get_object_from_data(item) + sibling = self.__class__(obj, data=item) + siblings.append(sibling) + sibling.object = sibling.from_native(item, None) + ret.append(sibling.from_native(item, None)) + errors.append(sibling._errors) + # Unused objects will be deleted + for item in self.unused_objects or []: + sibling = self.__class__(item) + sibling._delete = True + siblings.append(sibling) + self._siblings = siblings + self._errors = any(errors) and errors or [] + else: + ret = self.from_native(value, files) + if not self._errors: - self.object = obj + self.object = ret into[self.source or field_name] = self else: # Propagate errors up to our parent @@ -647,13 +718,23 @@ class ModelSerializer(Serializer): Override the default method to also include model field validation. """ instance = super(ModelSerializer, self).from_native(data, files) - if instance: - return self.full_clean(instance) + if self.many and hasattr(self, '_siblings'): + objects = [s.full_clean(s.object) if s.object else None for s in self._siblings] + self._errors = [s._errors for s in self._siblings] + return objects + else: + if instance: + return self.full_clean(instance) def save_object(self, obj, parent=None, fk_field=None): """ Save the deserialized object and return it. """ + if self.many: + for s in self._siblings: + s.save_object(s.object, parent, fk_field) + return + if self._delete: obj.delete() return diff --git a/rest_framework/tests/nesting.py b/rest_framework/tests/nesting.py index f23ef5c18..a55ac9744 100644 --- a/rest_framework/tests/nesting.py +++ b/rest_framework/tests/nesting.py @@ -4,6 +4,28 @@ from django.test import TestCase from rest_framework import serializers +class OneToManyTarget(models.Model): + name = models.CharField(max_length=100) + + +class OneToManyTargetSource(models.Model): + name = models.CharField(max_length=100) + target = models.ForeignKey(OneToManyTarget, + related_name='target_sources') + + +class OneToManySource(models.Model): + name = models.CharField(max_length=100) + target_source = models.ForeignKey(OneToManyTargetSource, + related_name='sources') + + +class OneToManySource(models.Model): + name = models.CharField(max_length=100) + target = models.ForeignKey(OneToManyTarget, + related_name='sources') + + class OneToOneTarget(models.Model): name = models.CharField(max_length=100) @@ -39,6 +61,101 @@ class OneToOneTargetSerializer(serializers.ModelSerializer): model = OneToOneTarget +class OneToManySourceSerializer(serializers.ModelSerializer): + class Meta: + model = OneToManySource + exclude = ('target_source', ) + + +class OneToManyTargetSourceSerializer(serializers.ModelSerializer): + sources = OneToManySourceSerializer(many=True, required=False) + + class Meta: + model = OneToManyTargetSource + exclude = ('target', ) + + +class OneToManyTargetSerializer(serializers.ModelSerializer): + target_sources = OneToManyTargetSourceSerializer(many=True) + + class Meta: + model = OneToManyTarget + + +class NestedOneToManyTests(TestCase): + def setUp(self): + target = OneToManyTarget(name='target-1') + target.save() + target_source = OneToManyTargetSource(name='target-source-1', target=target) + target_source.save() + for idx in range(1, 4): + source = OneToManySource(name='source-%d' % idx, target_source=target_source) + source.save() + + def test_one_to_many_retrieve(self): + queryset = OneToManyTarget.objects.all() + serializer = OneToManyTargetSerializer(queryset) + expected = [ + {'id': 1, 'name': 'target-1', 'target_sources': [{'id': 1, 'name': 'target-source-1', 'sources': [{'id': 1, 'name': 'source-1'}, {'id': 2, 'name': 'source-2'}, {'id': 3, 'name': 'source-3'}]}]} + ] + self.assertEquals(serializer.data, expected) + + def test_one_to_many_create(self): + # Note the nonsensical source id given + data = {'id': 2, 'name': 'target-2', 'target_sources': [{'id': 2, 'name': 'target-source-2', 'sources': [{'id': 2, 'name': 'source-4'}]}]} + expected = {'id': 2, 'name': 'target-2', 'target_sources': [{'id': 2, 'name': 'target-source-2', 'sources': [{'id': 4, 'name': 'source-4'}]}]} + serializer = OneToManyTargetSerializer(data=data) + self.assertTrue(serializer.is_valid()) + obj = serializer.save() + self.assertEquals(serializer.data, expected) + self.assertEqual(obj.name, 'target-2') + + # Ensure (target 4, target_source 4, source 4) are added, and + # everything else is as expected. + queryset = OneToManyTarget.objects.all() + serializer = OneToManyTargetSerializer(queryset) + expected = [ + {'id': 1, 'name': 'target-1', 'target_sources': [{'id': 1, 'name': 'target-source-1', 'sources': [{'id': 1, 'name': 'source-1'}, {'id': 2, 'name': 'source-2'}, {'id': 3, 'name': 'source-3'}]}]}, + {'id': 2, 'name': 'target-2', 'target_sources': [{'id': 2, 'name': 'target-source-2', 'sources': [{'id': 4, 'name': 'source-4'}]}]} + ] + self.assertEquals(serializer.data, expected) + + def test_one_to_many_update(self): + data = {'id': 1, 'name': 'target-1-updated', 'target_sources': [{'id': 1, 'name': 'target-source-1-updated', 'sources': [{'id': 1, 'name': 'source-1-updated'}, {'id': 2, 'name': 'source-2'}, {'id': 3, 'name': 'source-3'}]}]} + expected = {'id': 1, 'name': 'target-1-updated', 'target_sources': [{'id': 1, 'name': 'target-source-1-updated', 'sources': [{'id': 1, 'name': 'source-1-updated'}, {'id': 2, 'name': 'source-2'}, {'id': 3, 'name': 'source-3'}]}]} + instance = OneToManyTarget.objects.get(pk=1) + serializer = OneToManyTargetSerializer(instance, data=data) + self.assertTrue(serializer.is_valid()) + obj = serializer.save() + self.assertEquals(serializer.data, expected) + self.assertEqual(obj.name, 'target-1-updated') + + # Ensure (target 1, target_source 1, source 1) are updated, + # and everything else is as expected. + queryset = OneToManyTarget.objects.all() + serializer = OneToManyTargetSerializer(queryset) + expected = [ + {'id': 1, 'name': 'target-1-updated', 'target_sources': [{'id': 1, 'name': 'target-source-1-updated', 'sources': [{'id': 1, 'name': 'source-1-updated'}, {'id': 2, 'name': 'source-2'}, {'id': 3, 'name': 'source-3'}]}]} + ] + self.assertEquals(serializer.data, expected) + + def test_one_to_many_delete(self): + data = {'id': 1, 'name': 'target-1', 'target_sources': [{'id': 1, 'name': 'target-source-1', 'sources': [{'id': 2, 'name': 'source-2'}]}]} + instance = OneToManyTarget.objects.get(pk=1) + serializer = OneToManyTargetSerializer(instance, data=data) + self.assertTrue(serializer.is_valid()) + obj = serializer.save() + + # Ensure target_source 1 is deleted, and everything else is as + # expected. + queryset = OneToManyTarget.objects.all() + serializer = OneToManyTargetSerializer(queryset) + expected = [ + {'id': 1, 'name': 'target-1', 'target_sources': [{'id': 1, 'name': 'target-source-1', 'sources': [{'id': 2, 'name': 'source-2'}]}]} + ] + self.assertEquals(serializer.data, expected) + + class NestedOneToOneTests(TestCase): def setUp(self): for idx in range(1, 4): @@ -58,7 +175,6 @@ class NestedOneToOneTests(TestCase): {'id': 3, 'name': 'target-3', 'target_source': {'id': 3, 'name': 'target-source-3', 'source': {'id': 3, 'name': 'source-3'}}} ] self.assertEquals(serializer.data, expected) - def test_one_to_one_create(self): data = {'id': 4, 'name': 'target-4', 'target_source': {'id': 4, 'name': 'target-source-4', 'source': {'id': 4, 'name': 'source-4'}}} diff --git a/rest_framework/tests/serializer.py b/rest_framework/tests/serializer.py index beb372c2b..9c0fdd787 100644 --- a/rest_framework/tests/serializer.py +++ b/rest_framework/tests/serializer.py @@ -266,7 +266,7 @@ class ValidationTests(TestCase): Data of the wrong type is not valid. """ data = ['i am', 'a', 'list'] - serializer = CommentSerializer(self.comment, data=data, many=True) + serializer = CommentSerializer([self.comment], data=data, many=True) self.assertEqual(serializer.is_valid(), False) self.assertTrue(isinstance(serializer.errors, list))