izyim/app/Models/Package.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Spatie\Activitylog\Traits\LogsActivity;

class Package extends Model
{

    use LogsActivity;

    protected $table = 'packages';

    protected $fillable = [
        'list_id', 'description', 'width', 'length', 'height', 'quantity'
    ];

    protected static $logFillable  = true;

    public function packingList()
    {
        return $this->belongsTo(PackingList::class, 'list_id');
    }
}