yii model获取错误的方法

public static function getModelError($model) {

 $errors = $model->getErrors(); //得到所有的错误信息

 if(!is_array($errors)) return '';

 $firstError = array_shift($errors);

 if(!is_array($firstError)) return '';

 return array_shift($firstError);

}

$model = new User();

$model->name = $name;

$model->nick_name = $nick_name;

$model->phone = $phone;

$model->sex = $sex;

$model->isNewRecord = true; //此语句可省略

if(!$model->save()){ //保存不成功

throw new RuntimeException('保存败.'.$model::getModelError($model));

}