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-rw-r--r--lib/sqlalchemy/ext/declarative/base.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/ext/declarative/base.py b/lib/sqlalchemy/ext/declarative/base.py
index 59ebe3722..3404ce9f4 100644
--- 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))))
)