web/app/Models/PkUserAnswer.php

<?php
/**
 * Created by PhpStorm.
 * User: guanxl
 * Date: 2018/3/19
 * Time: 18:43
 */
namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class PkUserAnswer extends Model
{
    protected $table = "bs_pk_user_answers";
    protected $primaryKey = "id";

    protected $dateFormat = 'U';
    const CREATED_AT = "create_time";

    public $fillable=["corp_id","activity_id","user_id","room_id","question_id","user_answer","is_correct"];
}