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-rw-r--r--lib/sqlalchemy/schema.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index 3d59e8291..94df6751c 100644
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -1134,7 +1134,8 @@ class Column(SchemaItem, expression.ColumnClause):
information is not transferred.
"""
- fk = [ForeignKey(f.column) for f in self.foreign_keys]
+ fk = [ForeignKey(f.column, _constraint=f.constraint)
+ for f in self.foreign_keys]
if name is None and self.name is None:
raise exc.InvalidRequestError("Cannot initialize a sub-selectable"
" with this Column object until it's 'name' has "