Add more stringent M2M tests and fix the bug they exposed

1 files changed, 9 insertions, 1 deletions

diff --git a/tests/schema/models.py b/tests/schema/models.py
index 69cf06f3c4..dc717ec105 100644
--- a/tests/schema/models.py
+++ b/tests/schema/models.py
@@ -37,7 +37,7 @@ class BookWithM2M(models.Model):
     author = models.ForeignKey(Author)
     title = models.CharField(max_length=100, db_index=True)
     pub_date = models.DateTimeField()
-    tags = models.ManyToManyField("Tag", related_name="books")
+    tags = models.ManyToManyField("TagM2MTest", related_name="books")
 
     class Meta:
         app_cache = new_app_cache
@@ -62,6 +62,14 @@ class Tag(models.Model):
         app_cache = new_app_cache
 
 
+class TagM2MTest(models.Model):
+    title = models.CharField(max_length=255)
+    slug = models.SlugField(unique=True)
+
+    class Meta:
+        app_cache = new_app_cache
+
+
 class TagIndexed(models.Model):
     title = models.CharField(max_length=255)
     slug = models.SlugField(unique=True)