Melcus/parking-system

use App\Models\Reservation;
use Illuminate\Support\Str;

class ReservationObserver
{
    public function creating(Reservation $reservation): void
    {
        $reservation->uuid = Str::uuid();

        Reservation::query()
            ->whereNull('paid_at')
            ->where('user_id', $reservation->user_id)
            ->delete();
    }
}

use App\Models\Reservation;
use App\Observers\ReservationObserver;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    //
    public function boot()
    {
        Reservation::observe(ReservationObserver::class);
    }
}