Optimizations play nicely with select_related, prefetch_related

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/test_relations_pk.py b/tests/test_relations_pk.py
index e95a877e..f872a8dc 100644
--- a/tests/test_relations_pk.py
+++ b/tests/test_relations_pk.py
@@ -71,6 +71,12 @@ class PKManyToManyTests(TestCase):
         with self.assertNumQueries(4):
             self.assertEqual(serializer.data, expected)
 
+    def test_many_to_many_retrieve_prefetch_related(self):
+        queryset = ManyToManySource.objects.all().prefetch_related('targets')
+        serializer = ManyToManySourceSerializer(queryset, many=True)
+        with self.assertNumQueries(2):
+            serializer.data
+
     def test_reverse_many_to_many_retrieve(self):
         queryset = ManyToManyTarget.objects.all()
         serializer = ManyToManyTargetSerializer(queryset, many=True)
@@ -188,6 +194,12 @@ class PKForeignKeyTests(TestCase):
         with self.assertNumQueries(3):
             self.assertEqual(serializer.data, expected)
 
+    def test_reverse_foreign_key_retrieve_prefetch_related(self):
+        queryset = ForeignKeyTarget.objects.all().prefetch_related('sources')
+        serializer = ForeignKeyTargetSerializer(queryset, many=True)
+        with self.assertNumQueries(2):
+            serializer.data
+
     def test_foreign_key_update(self):
         data = {'id': 1, 'name': 'source-1', 'target': 2}
         instance = ForeignKeySource.objects.get(pk=1)