diff options
Diffstat (limited to 'lib/sqlalchemy/attributes.py')
| -rw-r--r-- | lib/sqlalchemy/attributes.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/sqlalchemy/attributes.py b/lib/sqlalchemy/attributes.py index 29a79edd2..f2480918d 100644 --- a/lib/sqlalchemy/attributes.py +++ b/lib/sqlalchemy/attributes.py @@ -77,7 +77,10 @@ class PropHistory(object): def setattr(self, value): if isinstance(value, list): raise ("assigning a list to scalar property '%s' on '%s' instance %d" % (self.key, self.obj.__class__.__name__, id(self.obj))) - self.orig = self.obj.__dict__.get(self.key, None) + orig = self.obj.__dict__.get(self.key, None) + if orig is value: + return + self.orig = orig self.obj.__dict__[self.key] = value if self.extension is not None and self.orig is not value: self.extension.set(self.obj, value, self.orig) |