hebei-chengben-car/common/models/EModel.php

<?php
//model 的重写基类

namespace app\common\models;
use Yii;
use yii\base\Model;

class EModel extends Model
{

    /**
     * 获取模型验证的第一个错误
     */
    public function returnFirstError()
    {
        $errors = $this->getErrors();
        if(!empty($errors)){
            $firstError = array_splice($errors, 0,1);
            $attribute = key($firstError);
            return $this->getFirstError($attribute);
        }
        return null;
    }

}