Fixed #22356 -- Added a check to make sure unique_together fields are local.

1 files changed, 13 insertions, 0 deletions

diff --git a/django/db/models/base.py b/django/db/models/base.py
index 589d793627..b978d9ebdf 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -1346,6 +1346,19 @@ class Model(six.with_metaclass(ModelBase)):
                             id='models.E013',
                         )
                     )
+                elif field not in cls._meta.local_fields:
+                    errors.append(
+                        checks.Error(
+                            ("'%s' refers to field '%s' which is not local "
+                             "to model '%s'.") % (
+                                option, field_name, cls._meta.object_name
+                            ),
+                            hint=("This issue may be caused by multi-table "
+                                  "inheritance."),
+                            obj=cls,
+                            id='models.E016',
+                        )
+                    )
         return errors
 
     @classmethod