Ticket #10767: check-through-model-for-managed.diff

django/db/backends/__init__.py

@@ -497 +497 @@
                 if not model._meta.managed:
                     continue
                 tables.add(model._meta.db_table)
-                tables.update([f.m2m_db_table() for f in model._meta.local_many_to_many])
+                tables.update([f.m2m_db_table() for f in model._meta.local_many_to_many if f.rel.through is None or f.rel.through_model._meta.managed])
         if only_existing:
             tables = [t for t in tables if self.table_name_converter(t) in self.table_names()]
         return tables
@@ -530 +530 @@
                         break # Only one AutoField is allowed per model, so don't bother continuing.
 
                 for f in model._meta.local_many_to_many:
-                    sequence_list.append({'table': f.m2m_db_table(), 'column': None})
+                    if f.rel.through is None or f.rel.through_model._meta.managed:
+                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})
 
         return sequence_list