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Diffstat (limited to 'lib/sqlalchemy/ext/mutable.py')
| -rw-r--r-- | lib/sqlalchemy/ext/mutable.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/sqlalchemy/ext/mutable.py b/lib/sqlalchemy/ext/mutable.py index 4e574935d..7869e888c 100644 --- a/lib/sqlalchemy/ext/mutable.py +++ b/lib/sqlalchemy/ext/mutable.py @@ -437,6 +437,9 @@ class MutableBase(object): outgoing. """ + if value is oldvalue: + return value + if not isinstance(value, cls): value = cls.coerce(key, value) if value is not None: |