php/app/common/model/merchant/order/OrderMerchant.php

<?php
/**
 * @package merchant
 *
 * @author xaboy
 * @day 2020/5/30
 *
 * 
 */

namespace app\common\model\merchant\order;


use app\common\model\BaseModel;
use app\common\model\system\merchant\Merchant;

class OrderMerchant extends BaseModel
{

    public static function tablePk(): string
    {
        return 'id';
    }

    public static function tableName(): string
    {
        return 'order_merchant';
    }

    public function merchant()
    {
        return $this->hasOne(Merchant::class, 'mer_id', 'mer_id');
    }

}