我有以下代码
$criteria=new CDbCriteria;
$criteria->with = array('owner'=>array('select'=>array('*','payment_info'=>'payment_account')));
这工作正常，但是当我将 concat 添加到其中时
$criteria->with = array('owner'=>array('select'=>array('*','payment_info'=>'concat(payment_account)')));
它抛给我一个错误
Active record "User" is trying to select an invalid column "concat(payment_account)". Note, the column must exist in the table or be an expression with alias.
如何为其提供别名？
试着给它一个别名，比如：
$criteria->with = array('owner'=> array('select'=> array('*','payment_info'=>'concat(payment_account) as conc')));
我以前使用过这种方法没有问题。