_columns = {
'name': fields.char('Constraint', required=True, select=1,
help="PostgreSQL constraint or foreign key name."),
+ 'definition': fields.char('Definition', help="PostgreSQL constraint definition"),
'model': fields.many2one('ir.model', string='Model',
required=True, select=1),
'module': fields.many2one('ir.module.module', string='Module',