jiqu-library-server/app/Models/QuotaLog.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class QuotaLog extends Model
{
    /**
     * @var array
     */
    protected $fillable = [
        'user_id',
        'loggable_id',
        'loggable_type',
        'change_quota',
        'remarks',
    ];
}