Laravel Model observer get changed data

laravel_model_observe_change.md

    public function updated(Order $order)
    {
        $originals = [];
        if ($order->isDirty('order_status')) {
            Log::info("order new status :" . $order->order_status . " -- old status :" . $order->getOriginal('order_status'));
        }
        foreach ($order->getDirty() as $key => $val) {
            $originals[$key] = $order->getOriginal($key);
        }

        Log::info(json_encode([
            'changed' => $order->getDirty(),
            'originals'=>$originals,
        ]));

    }

code in OrderObserve

created by php artisan make:observe OrderObserve --model=Order