Merge pull request #115 from zlorf/related_attr

Add related attribute to TaggableManager (close #114).

taggit/managers.py

@@ -83,6 +83,7 @@ class TaggableManager(RelatedField):
             self.through is None or issubclass(self.through, GenericTaggedItemBase)
             self.through is None or issubclass(self.through, GenericTaggedItemBase)
         )
         )
         self.rel.to = self.through._meta.get_field("tag").rel.to
         self.rel.to = self.through._meta.get_field("tag").rel.to
+        self.related = RelatedObject(self.through, cls, self)
         if self.use_gfk:
         if self.use_gfk:
             tagged_items = GenericRelation(self.through)
             tagged_items = GenericRelation(self.through)
             tagged_items.contribute_to_class(cls, "tagged_items")
             tagged_items.contribute_to_class(cls, "tagged_items")

taggit/tests/tests.py

@@ -287,6 +287,13 @@ class TaggableManagerTestCase(BaseTaggingTestCase):
             ["hd"],
             ["hd"],
         )
         )
 
 
+    def test_field_api(self):
+        # Check if tag field, which simulates m2m, has django-like api.
+        field = self.food_model._meta.get_field('tags')
+        self.assertTrue(hasattr(field, 'rel'))
+        self.assertTrue(hasattr(field, 'related'))
+        self.assertEqual(self.food_model, field.related.model)
+
 
 
 class TaggableManagerDirectTestCase(TaggableManagerTestCase):
 class TaggableManagerDirectTestCase(TaggableManagerTestCase):
     food_model = DirectFood
     food_model = DirectFood