diff options
Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 416a4e82e..cdb1dbca8 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -256,6 +256,15 @@ class ClauseElement( return c + def _negate_in_binary(self, negated_op, original_op): + """a hook to allow the right side of a binary expression to respond + to a negation of the binary expression. + + Used for the special case of expanding bind parameter with IN. + + """ + return self + def _with_binary_element_type(self, type_): """in the context of binary expression, convert the type of this object to the one given. @@ -1510,6 +1519,14 @@ class BindParameter(roles.InElementRole, ColumnElement): literal_execute=True, ) + def _negate_in_binary(self, negated_op, original_op): + if self.expand_op is original_op: + bind = self._clone() + bind.expand_op = negated_op + return bind + else: + return self + def _with_binary_element_type(self, type_): c = ClauseElement._clone(self) c.type = type_ @@ -3729,7 +3746,7 @@ class BinaryExpression(ColumnElement): if self.negate is not None: return BinaryExpression( self.left, - self.right, + self.right._negate_in_binary(self.negate, self.operator), self.negate, negate=self.operator, type_=self.type, |