diff options
Diffstat (limited to 'lib/sqlalchemy')
| -rw-r--r-- | lib/sqlalchemy/orm/query.py | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/sqlalchemy/orm/query.py b/lib/sqlalchemy/orm/query.py index 02cfbfcb2..7e65f26e2 100644 --- a/lib/sqlalchemy/orm/query.py +++ b/lib/sqlalchemy/orm/query.py @@ -1784,8 +1784,17 @@ class Query(Generative): """ + zero = self._joinpoint_zero() + if zero is None: + raise sa_exc.InvalidRequestError( + "Can't use filter_by when the first entity '%s' of a query " + "is not a mapped class. Please use the filter method instead, " + "or change the order of the entities in the query" + % self._query_entity_zero() + ) + clauses = [ - _entity_descriptor(self._joinpoint_zero(), key) == value + _entity_descriptor(zero, key) == value for key, value in kwargs.items() ] return self.filter(*clauses) |