php/app/common/model/user/UserBill.php

<?php
/**
 * @package merchant
 *
 * @author xaboy
 * @day 2020-05-07
 *
 * 
 */

namespace app\common\model\user;


use app\common\model\BaseModel;

class UserBill extends BaseModel
{

    /**
     * @return string
     * @author xaboy
     * @day 2020-03-30
     */
    public static function tablePk(): string
    {
        return 'bill_id';
    }

    /**
     * @return string
     * @author xaboy
     * @day 2020-03-30
     */
    public static function tableName(): string
    {
        return 'user_bill';
    }

    public function user()
    {
        return $this->hasOne(User::class, 'uid', 'uid');
    }
}