c3lf-system-3/app/File.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class File extends Model
{

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'hash', 'iid'
    ];

    protected $primaryKey = 'hash';

    /**
     * The attributes excluded from the model's JSON form.
     *
     * @var array
     */
    protected $hidden = ['created_at','updated_at'];
}