GY_zhishiku_admin/app/Model/qw/QwHistory.php

<?php
namespace App\Model\qw;

use Illuminate\Database\Eloquent\Model;


class QwHistory extends Model
{

    public $table = "jm_qw_history";
    public $timestamps = false;


    /**
     * 答案转换
     */
    public function getAnswerAttribute($value)
    {
        return $value ? implode(',' , json_decode($value)) : '--';
    }
}