Mention the correct way of adding multiple attributes which refer to the same column

(cherry picked from commit 2880f24d93a774d02cde83dbabfd80ad279cbb05)

diff --git a/lib/sqlalchemy/ext/declarative/base.py b/lib/sqlalchemy/ext/declarative/base.py
index 59ebe3722a570b96504c6d55b580615164520389..3404ce9f474e1376f4c53396d7c9b2b8a157d0b6 100644 (file)
--- a/lib/sqlalchemy/ext/declarative/base.py
+++ b/lib/sqlalchemy/ext/declarative/base.py
@@ -351,7 +351,8 @@ class _MapperConfig(object):
                 util.warn(
                     "On class %r, Column object %r named "
                     "directly multiple times, "
-                    "only one will be used: %s" %
+                    "only one will be used: %s. "
+                    "Consider using orm.synonym instead" %
                     (self.classname, name, (", ".join(sorted(keys))))
                 )