Tests for generic relationships

rest_framework/relations.py

@@ -49,7 +49,7 @@ class RelatedField(Field):
         ])
 
 
-class StringRelatedField(Field):
+class StringRelatedField(RelatedField):
     """
     A read only field that represents its targets using their
     plain string representation.

rest_framework/serializers.py

@@ -520,11 +520,6 @@ class ModelSerializer(Serializer):
                 ret[field_name] = declared_fields[field_name]
                 continue
 
-            elif field_name == api_settings.URL_FIELD_NAME:
-                # Create the URL field.
-                field_cls = HyperlinkedIdentityField
-                kwargs = get_url_kwargs(model)
-
             elif field_name in info.fields_and_pk:
                 # Create regular model fields.
                 model_field = info.fields_and_pk[field_name]
@@ -561,6 +556,11 @@ class ModelSerializer(Serializer):
                 field_cls = ReadOnlyField
                 kwargs = {}
 
+            elif field_name == api_settings.URL_FIELD_NAME:
+                # Create the URL field.
+                field_cls = HyperlinkedIdentityField
+                kwargs = get_url_kwargs(model)
+
             else:
                 raise ImproperlyConfigured(
                     'Field name `%s` is not valid for model `%s`.' %

tests/test_genericrelations.py

-# from __future__ import unicode_literals
-# from django.contrib.contenttypes.models import ContentType
-# from django.contrib.contenttypes.generic import GenericRelation, GenericForeignKey
-# from django.db import models
-# from django.test import TestCase
-# from rest_framework import serializers
-# from rest_framework.compat import python_2_unicode_compatible
-
-
-# @python_2_unicode_compatible
-# class Tag(models.Model):
-#     """
-#     Tags have a descriptive slug, and are attached to an arbitrary object.
-#     """
-#     tag = models.SlugField()
-#     content_type = models.ForeignKey(ContentType)
-#     object_id = models.PositiveIntegerField()
-#     tagged_item = GenericForeignKey('content_type', 'object_id')
-
-#     def __str__(self):
-#         return self.tag
-
-
-# @python_2_unicode_compatible
-# class Bookmark(models.Model):
-#     """
-#     A URL bookmark that may have multiple tags attached.
-#     """
-#     url = models.URLField()
-#     tags = GenericRelation(Tag)
-
-#     def __str__(self):
-#         return 'Bookmark: %s' % self.url
-
-
-# @python_2_unicode_compatible
-# class Note(models.Model):
-#     """
-#     A textual note that may have multiple tags attached.
-#     """
-#     text = models.TextField()
-#     tags = GenericRelation(Tag)
-
-#     def __str__(self):
-#         return 'Note: %s' % self.text
-
-
-# class TestGenericRelations(TestCase):
-#     def setUp(self):
-#         self.bookmark = Bookmark.objects.create(url='https://www.djangoproject.com/')
-#         Tag.objects.create(tagged_item=self.bookmark, tag='django')
-#         Tag.objects.create(tagged_item=self.bookmark, tag='python')
-#         self.note = Note.objects.create(text='Remember the milk')
-#         Tag.objects.create(tagged_item=self.note, tag='reminder')
-
-#     def test_generic_relation(self):
-#         """
-#         Test a relationship that spans a GenericRelation field.
-#         IE. A reverse generic relationship.
-#         """
-
-#         class BookmarkSerializer(serializers.ModelSerializer):
-#             tags = serializers.RelatedField(many=True)
-
-#             class Meta:
-#                 model = Bookmark
-#                 exclude = ('id',)
-
-#         serializer = BookmarkSerializer(self.bookmark)
-#         expected = {
-#             'tags': ['django', 'python'],
-#             'url': 'https://www.djangoproject.com/'
-#         }
-#         self.assertEqual(serializer.data, expected)
-
-#     def test_generic_nested_relation(self):
-#         """
-#         Test saving a GenericRelation field via a nested serializer.
-#         """
-
-#         class TagSerializer(serializers.ModelSerializer):
-#             class Meta:
-#                 model = Tag
-#                 exclude = ('content_type', 'object_id')
-
-#         class BookmarkSerializer(serializers.ModelSerializer):
-#             tags = TagSerializer(many=True)
-
-#             class Meta:
-#                 model = Bookmark
-#                 exclude = ('id',)
-
-#         data = {
-#             'url': 'https://docs.djangoproject.com/',
-#             'tags': [
-#                 {'tag': 'contenttypes'},
-#                 {'tag': 'genericrelations'},
-#             ]
-#         }
-#         serializer = BookmarkSerializer(data=data)
-#         self.assertTrue(serializer.is_valid())
-#         serializer.save()
-#         self.assertEqual(serializer.object.tags.count(), 2)
-
-#     def test_generic_fk(self):
-#         """
-#         Test a relationship that spans a GenericForeignKey field.
-#         IE. A forward generic relationship.
-#         """
-
-#         class TagSerializer(serializers.ModelSerializer):
-#             tagged_item = serializers.RelatedField()
-
-#             class Meta:
-#                 model = Tag
-#                 exclude = ('id', 'content_type', 'object_id')
-
-#         serializer = TagSerializer(Tag.objects.all(), many=True)
-#         expected = [
-#             {
-#                 'tag': 'django',
-#                 'tagged_item': 'Bookmark: https://www.djangoproject.com/'
-#             },
-#             {
-#                 'tag': 'python',
-#                 'tagged_item': 'Bookmark: https://www.djangoproject.com/'
-#             },
-#             {
-#                 'tag': 'reminder',
-#                 'tagged_item': 'Note: Remember the milk'
-#             }
-#         ]
-#         self.assertEqual(serializer.data, expected)
-
-#     def test_restore_object_generic_fk(self):
-#         """
-#         Ensure an object with a generic foreign key can be restored.
-#         """
-
-#         class TagSerializer(serializers.ModelSerializer):
-#             class Meta:
-#                 model = Tag
-#                 exclude = ('content_type', 'object_id')
-
-#         serializer = TagSerializer()
-
-#         bookmark = Bookmark(url='http://example.com')
-#         attrs = {'tagged_item': bookmark, 'tag': 'example'}
-
-#         tag = serializer.restore_object(attrs)
-#         self.assertEqual(tag.tagged_item, bookmark)
+from __future__ import unicode_literals
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.contenttypes.generic import GenericRelation, GenericForeignKey
+from django.db import models
+from django.test import TestCase
+from rest_framework import serializers
+from rest_framework.compat import python_2_unicode_compatible
+
+
+@python_2_unicode_compatible
+class Tag(models.Model):
+    """
+    Tags have a descriptive slug, and are attached to an arbitrary object.
+    """
+    tag = models.SlugField()
+    content_type = models.ForeignKey(ContentType)
+    object_id = models.PositiveIntegerField()
+    tagged_item = GenericForeignKey('content_type', 'object_id')
+
+    def __str__(self):
+        return self.tag
+
+
+@python_2_unicode_compatible
+class Bookmark(models.Model):
+    """
+    A URL bookmark that may have multiple tags attached.
+    """
+    url = models.URLField()
+    tags = GenericRelation(Tag)
+
+    def __str__(self):
+        return 'Bookmark: %s' % self.url
+
+
+@python_2_unicode_compatible
+class Note(models.Model):
+    """
+    A textual note that may have multiple tags attached.
+    """
+    text = models.TextField()
+    tags = GenericRelation(Tag)
+
+    def __str__(self):
+        return 'Note: %s' % self.text
+
+
+class TestGenericRelations(TestCase):
+    def setUp(self):
+        self.bookmark = Bookmark.objects.create(url='https://www.djangoproject.com/')
+        Tag.objects.create(tagged_item=self.bookmark, tag='django')
+        Tag.objects.create(tagged_item=self.bookmark, tag='python')
+        self.note = Note.objects.create(text='Remember the milk')
+        Tag.objects.create(tagged_item=self.note, tag='reminder')
+
+    def test_generic_relation(self):
+        """
+        Test a relationship that spans a GenericRelation field.
+        IE. A reverse generic relationship.
+        """
+
+        class BookmarkSerializer(serializers.ModelSerializer):
+            tags = serializers.StringRelatedField(many=True)
+
+            class Meta:
+                model = Bookmark
+                fields = ('tags', 'url')
+
+        serializer = BookmarkSerializer(self.bookmark)
+        expected = {
+            'tags': ['django', 'python'],
+            'url': 'https://www.djangoproject.com/'
+        }
+        self.assertEqual(serializer.data, expected)
+
+    def test_generic_fk(self):
+        """
+        Test a relationship that spans a GenericForeignKey field.
+        IE. A forward generic relationship.
+        """
+
+        class TagSerializer(serializers.ModelSerializer):
+            tagged_item = serializers.StringRelatedField()
+
+            class Meta:
+                model = Tag
+                fields = ('tag', 'tagged_item')
+
+        serializer = TagSerializer(Tag.objects.all(), many=True)
+        expected = [
+            {
+                'tag': 'django',
+                'tagged_item': 'Bookmark: https://www.djangoproject.com/'
+            },
+            {
+                'tag': 'python',
+                'tagged_item': 'Bookmark: https://www.djangoproject.com/'
+            },
+            {
+                'tag': 'reminder',
+                'tagged_item': 'Note: Remember the milk'
+            }
+        ]
+        self.assertEqual(serializer.data, expected)