diff options
Diffstat (limited to 'lib/sqlalchemy/orm/attributes.py')
| -rw-r--r-- | lib/sqlalchemy/orm/attributes.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/sqlalchemy/orm/attributes.py b/lib/sqlalchemy/orm/attributes.py index 2e1b9dc75..07b147f10 100644 --- a/lib/sqlalchemy/orm/attributes.py +++ b/lib/sqlalchemy/orm/attributes.py @@ -353,7 +353,14 @@ class InstrumentedAttribute(QueryableAttribute): if self._supports_population and self.key in dict_: return dict_[self.key] else: - return self.impl.get(instance_state(instance), dict_) + try: + state = instance_state(instance) + except AttributeError as err: + util.raise_( + orm_exc.UnmappedInstanceError(instance), + replace_context=err, + ) + return self.impl.get(state, dict_) HasEntityNamespace = util.namedtuple( |