From 0f6352d74d114b54bad543927af70adb1e5ca34e Mon Sep 17 00:00:00 2001
From: Markus Grimm <grimm@magazino.eu>
Date: Thu, 9 Aug 2018 09:13:48 +0200
Subject: [PATCH] Added test

---
 polymorphic/tests/test_orm.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/polymorphic/tests/test_orm.py b/polymorphic/tests/test_orm.py
index 335d450..d58df5c 100644
--- a/polymorphic/tests/test_orm.py
+++ b/polymorphic/tests/test_orm.py
@@ -73,6 +73,7 @@ from polymorphic.tests.models import (
     RelationB,
     RelationBC,
     RelationBase,
+    RelatingModel,
     RubberDuck,
     TestParentLinkAndRelatedName,
     UUIDArtProject,
@@ -997,3 +998,12 @@ class PolymorphicTests(TransactionTestCase):
             MultiTableDerived.objects.bulk_create([
                 MultiTableDerived(field1='field1', field2='field2')
             ])
+
+    def test_prefetch_related_behaves_normally_with_polymorphic_model(self):
+        b1 = RelatingModel.objects.create()
+        b2 = RelatingModel.objects.create()
+        a = b1.many2many.create()
+        b2.many2many.add(a)
+        qs = RelatingModel.objects.prefetch_related('many2many')
+        for obj in qs:
+            self.assertEqual(len(obj.many2many.all()), 1)