bot-28/app/Models/ActivityUser.php

<?php

namespace App\Models;

use App\Constants\Util;

class ActivityUser extends BaseModel
{
    protected $table = 'activity_user';
    protected $fillable = ['activity_id', 'member_id', 'title', 'sub_title', 'detail_image', 'start_time', 'end_time', 'part_in_time'];

    protected function getDetailImageAttribute($value)
    {
        return Util::ensureUrl($value);
    }

    protected function getStartTimeAttribute($value): string
    {
        return date('Y-m-d', $value);
    }

    protected function getEndTimeAttribute($value): string
    {
        return date('Y-m-d', $value);
    }
}