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-rw-r--r--lib/sqlalchemy/ext/instrumentation.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/sqlalchemy/ext/instrumentation.py b/lib/sqlalchemy/ext/instrumentation.py
index b1138a4ad..c14b466eb 100644
--- a/lib/sqlalchemy/ext/instrumentation.py
+++ b/lib/sqlalchemy/ext/instrumentation.py
@@ -23,6 +23,7 @@ from ..orm import base as orm_base
from ..orm import collections
from ..orm import exc as orm_exc
from ..orm import instrumentation as orm_instrumentation
+from ..orm import util as orm_util
from ..orm.instrumentation import _default_dict_getter
from ..orm.instrumentation import _default_manager_getter
from ..orm.instrumentation import _default_opt_manager_getter
@@ -437,5 +438,7 @@ def _install_lookups(lookups):
attributes.manager_of_class
) = orm_instrumentation.manager_of_class = manager_of_class
orm_base.opt_manager_of_class = (
+ orm_util.opt_manager_of_class
+ ) = (
attributes.opt_manager_of_class
) = orm_instrumentation.opt_manager_of_class = opt_manager_of_class