diff options
Diffstat (limited to 'lib/sqlalchemy/orm')
| -rw-r--r-- | lib/sqlalchemy/orm/strategies.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/strategies.py b/lib/sqlalchemy/orm/strategies.py index caf0da340..c70994e8f 100644 --- a/lib/sqlalchemy/orm/strategies.py +++ b/lib/sqlalchemy/orm/strategies.py @@ -1309,6 +1309,10 @@ class JoinedLoader(AbstractRelationshipLoader): self.mapper, flat=True, use_mapper_path=True) + # load up the .columns collection on the Alias() before + # the object becomes shared among threads. this prevents + # races for column identities. + inspect(to_adapt).selectable.c self._aliased_class_pool.append(to_adapt) |