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-rw-r--r--lib/sqlalchemy/orm/mapper.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/mapper.py b/lib/sqlalchemy/orm/mapper.py
index eb5abbd4f..df67ff147 100644
--- a/lib/sqlalchemy/orm/mapper.py
+++ b/lib/sqlalchemy/orm/mapper.py
@@ -1501,6 +1501,10 @@ class Mapper(InspectionAttr):
return identities
+ @_memoized_configured_property
+ def _prop_set(self):
+ return frozenset(self._props.values())
+
def _adapt_inherited_property(self, key, prop, init):
if not self.concrete:
self._configure_property(key, prop, init=False, setparent=False)