- [feature] Added support for .info dictionary argument to

column_property(), relationship(), composite().
All MapperProperty classes have an auto-creating .info
dict available overall.

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/sqlalchemy/orm/interfaces.py b/lib/sqlalchemy/orm/interfaces.py
index f41c5894e..12c38b595 100644
--- a/lib/sqlalchemy/orm/interfaces.py
+++ b/lib/sqlalchemy/orm/interfaces.py
@@ -126,6 +126,22 @@ class MapperProperty(_InspectionAttr):
     def instrument_class(self, mapper):  # pragma: no-coverage
         raise NotImplementedError()
 
+    @util.memoized_property
+    def info(self):
+        """Info dictionary associated with the object, allowing user-defined
+        data to be associated with this :class:`.MapperProperty`.
+
+        The dictionary is generated when first accessed.  Alternatively,
+        it can be specified as a constructor argument to the
+        :func:`.column_property`, :func:`.relationship`, or :func:`.composite`
+        functions.
+
+        .. versionadded:: 0.8  Added support for .info to all
+           :class:`.MapperProperty` subclasses.
+
+        """
+        return {}
+
     _configure_started = False
     _configure_finished = False