phpstock/app/txx/model/YzActivityPromoCode.php

<?php
declare (strict_types = 1);

namespace app\txx\model;

use think\Model;

/**
 * @mixin \think\Model
 */
class YzActivityPromoCode extends Model
{
    protected $connection = 'mysql_yz';//切换连接参数
    protected $table = 'yz_activity_promocode';
    protected $pk = 'id';
    protected $autoWriteTimestamp = false;
    protected $createTime="createTime";
    protected $updateTime="updateTime";

    public function Good()
    {
        return $this->belongsTo(ActGood::class,'act_good_id','id')->bind(["good_name","actCode"]);
    }
}