From ca7b1f6d5189398be8a0d24b1e01577281b1b187 Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Wed, 10 Dec 2014 21:09:45 +0000
Subject: Optimizations play nicely with select_related, prefetch_related

---
 tests/test_relations_slug.py | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'tests/test_relations_slug.py')

diff --git a/tests/test_relations_slug.py b/tests/test_relations_slug.py
index 7bac9046..cd2cb1ed 100644
--- a/tests/test_relations_slug.py
+++ b/tests/test_relations_slug.py
@@ -54,7 +54,14 @@ class SlugForeignKeyTests(TestCase):
             {'id': 2, 'name': 'source-2', 'target': 'target-1'},
             {'id': 3, 'name': 'source-3', 'target': 'target-1'}
         ]
-        self.assertEqual(serializer.data, expected)
+        with self.assertNumQueries(4):
+            self.assertEqual(serializer.data, expected)
+
+    def test_foreign_key_retrieve_select_related(self):
+        queryset = ForeignKeySource.objects.all().select_related('target')
+        serializer = ForeignKeySourceSerializer(queryset, many=True)
+        with self.assertNumQueries(1):
+            serializer.data
 
     def test_reverse_foreign_key_retrieve(self):
         queryset = ForeignKeyTarget.objects.all()
@@ -65,6 +72,12 @@ class SlugForeignKeyTests(TestCase):
         ]
         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': 'target-2'}
         instance = ForeignKeySource.objects.get(pk=1)
-- 
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