[1.7.x] Fixed #22476: Couldn't alter attributes on M2Ms with through= set

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/schema/models.py b/tests/schema/models.py
index f85a3c6362..f5f59f7416 100644
--- a/tests/schema/models.py
+++ b/tests/schema/models.py
@@ -24,6 +24,22 @@ class AuthorWithM2M(models.Model):
         apps = new_apps
 
 
+class AuthorWithM2MThrough(models.Model):
+    name = models.CharField(max_length=255)
+    tags = models.ManyToManyField("schema.TagM2MTest", related_name="authors", through="AuthorTag")
+
+    class Meta:
+        apps = new_apps
+
+
+class AuthorTag(models.Model):
+    author = models.ForeignKey("schema.AuthorWithM2MThrough")
+    tag = models.ForeignKey("schema.TagM2MTest")
+
+    class Meta:
+        apps = new_apps
+
+
 class Book(models.Model):
     author = models.ForeignKey(Author)
     title = models.CharField(max_length=100, db_index=True)