diff options
Diffstat (limited to 'lib/sqlalchemy/sql/schema.py')
| -rw-r--r-- | lib/sqlalchemy/sql/schema.py | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/lib/sqlalchemy/sql/schema.py b/lib/sqlalchemy/sql/schema.py index e6d3a6b05..5445a1bce 100644 --- a/lib/sqlalchemy/sql/schema.py +++ b/lib/sqlalchemy/sql/schema.py @@ -107,12 +107,13 @@ class SchemaItem(SchemaEventTarget, visitors.Visitable): if item is not None: try: spwd = item._set_parent_with_dispatch - except AttributeError: - util.raise_from_cause( + except AttributeError as err: + util.raise_( exc.ArgumentError( "'SchemaItem' object, such as a 'Column' or a " "'Constraint' expected, got %r" % item - ) + ), + replace_context=err, ) else: spwd(self) @@ -1569,15 +1570,16 @@ class Column(DialectKWArgs, SchemaItem, ColumnClause): _proxies=[self], *fk ) - except TypeError: - util.raise_from_cause( + except TypeError as err: + util.raise_( TypeError( "Could not create a copy of this %r object. " "Ensure the class includes a _constructor() " "attribute or method which accepts the " "standard Column constructor arguments, or " "references the Column class itself." % self.__class__ - ) + ), + from_=err, ) c.table = selectable @@ -3187,10 +3189,13 @@ class ForeignKeyConstraint(ColumnCollectionConstraint): try: ColumnCollectionConstraint._set_parent(self, table) except KeyError as ke: - raise exc.ArgumentError( - "Can't create ForeignKeyConstraint " - "on table '%s': no column " - "named '%s' is present." % (table.description, ke.args[0]) + util.raise_( + exc.ArgumentError( + "Can't create ForeignKeyConstraint " + "on table '%s': no column " + "named '%s' is present." % (table.description, ke.args[0]) + ), + from_=ke, ) for col, fk in zip(self.columns, self.elements): |