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-rw-r--r--lib/sqlalchemy/dialects/postgresql/ext.py11
1 files changed, 4 insertions, 7 deletions
diff --git a/lib/sqlalchemy/dialects/postgresql/ext.py b/lib/sqlalchemy/dialects/postgresql/ext.py
index f382af86f..8c09eddda 100644
--- a/lib/sqlalchemy/dialects/postgresql/ext.py
+++ b/lib/sqlalchemy/dialects/postgresql/ext.py
@@ -7,7 +7,6 @@
# mypy: ignore-errors
from __future__ import annotations
-from itertools import zip_longest
from typing import Any
from typing import TYPE_CHECKING
from typing import TypeVar
@@ -256,22 +255,20 @@ class ExcludeConstraint(ColumnCollectionConstraint):
self._render_exprs = [
(
- expr if isinstance(expr, elements.ClauseElement) else colexpr,
+ expr if not isinstance(expr, str) else table.c[expr],
name,
operator,
)
- for (expr, name, operator), colexpr in zip_longest(
- self._render_exprs, self.columns
- )
+ for expr, name, operator in (self._render_exprs)
]
def _copy(self, target_table=None, **kw):
elements = [
(
schema._copy_expression(expr, self.parent, target_table),
- self.operators[expr.name],
+ operator,
)
- for expr in self.columns
+ for expr, _, operator in self._render_exprs
]
c = self.__class__(
*elements,