yii cdbexpression表达式，别名错误

Question

我有以下代码

$criteria=new CDbCriteria;
$criteria->with = array('owner'=>array('select'=>array('*','payment_info'=>'payment_account')));

工作正常，但当我添加concat

$criteria->with = array('owner'=>array('select'=>array('*','payment_info'=>'concat(payment_account)')));

它引发了我的错误

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. 

如何为它提供别名？

Answer 1

尝试给它一个别名，例如：

$criteria->with = array('owner'=> array('select'=> array('*','payment_info'=>'concat(payment_account) as conc')));

之前我没有遇到过这种方法。