cxinv/app/admin/model/InvoiceTicket.php

<?php
declare (strict_types = 1);

namespace app\admin\model;

use think\facade\Log;use think\Model;

/**
 * @mixin \think\Model
 */
class InvoiceTicket extends Model
{
    public function getItemAttr($v){
        return json_decode($v,true);
    }
    public function setItemAttr($v){
      return json_encode($v,JSON_UNESCAPED_UNICODE);
    }

}