Fixed #26796 -- Added a system check for m2m fields with ignored limit_choices_to.

1 files changed, 9 insertions, 0 deletions

diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index d7b61f9a5a..8cc174bdfb 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -1228,6 +1228,15 @@ class ManyToManyField(RelatedField):
                     id='fields.W341',
                 )
             )
+        if self.remote_field.limit_choices_to and self.remote_field.through:
+            warnings.append(
+                checks.Warning(
+                    'limit_choices_to has no effect on ManyToManyField '
+                    'with a through model.',
+                    obj=self,
+                    id='fields.W343',
+                )
+            )
 
         return warnings