Testing chained pk lookups

Author: emperorcezar

tests/query/tests.py

@@ -234,6 +234,13 @@ def test_multiple_filter_on_same_name(self):
             []
         )
 
+        # Tests chaining on primary keys
+        blog_id = Blog.objects.get().id
+        self.assertEqual(
+            Blog.objects.filter(pk = blog_id).filter(pk = blog_id).get(),
+            Blog.objects.get()
+        )
+
     def test_negated_Q(self):
         blogs = [Blog.objects.create(title=title) for title in
                  ('blog', 'other blog', 'another blog')]