diff options
Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 27ecce2b0..41dfcf147 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -715,7 +715,14 @@ class ColumnElement(operators.ColumnOperators, ClauseElement): @util.memoized_property def comparator(self): - return self.type.comparator_factory(self) + try: + comparator_factory = self.type.comparator_factory + except AttributeError: + raise TypeError( + "Object %r associated with '.type' attribute " + "is not a TypeEngine class or object" % self.type) + else: + return comparator_factory(self) def __getattr__(self, key): try: |