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-rw-r--r--lib/sqlalchemy/orm/deprecated_interfaces.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/deprecated_interfaces.py b/lib/sqlalchemy/orm/deprecated_interfaces.py
index 3e4f268d0..52193b149 100644
--- a/lib/sqlalchemy/orm/deprecated_interfaces.py
+++ b/lib/sqlalchemy/orm/deprecated_interfaces.py
@@ -526,6 +526,10 @@ class AttributeExtension(object):
active_history = True
"""indicates that the set() method would like to receive the 'old' value,
even if it means firing lazy callables.
+
+ Note that ``active_history`` can also be set directly via
+ :func:`.column_property` and :func:`.relationship`.
+
"""
@classmethod