diff options
Diffstat (limited to 'lib/sqlalchemy/orm/mapper.py')
| -rw-r--r-- | lib/sqlalchemy/orm/mapper.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/sqlalchemy/orm/mapper.py b/lib/sqlalchemy/orm/mapper.py index dd3aef8d6..a3b209e4a 100644 --- a/lib/sqlalchemy/orm/mapper.py +++ b/lib/sqlalchemy/orm/mapper.py @@ -3920,12 +3920,16 @@ class Mapper( ], ] = util.defaultdict(list) + def set_union(x, y): + return x.union(y) + for table in self._sorted_tables: cols = set(table.c) + for m in self.iterate_to_root(): if m._inherits_equated_pairs and cols.intersection( reduce( - set.union, # type: ignore + set_union, [l.proxy_set for l, r in m._inherits_equated_pairs], ) ): |