php - Laravel 8 eloquent query delete

How to delete the aircon in database when there is no any data.

Order and Aircon are many to many relationship.

$orders = Order::with('aircons', 'user')
                ->where('user_id', auth()->id())
                ->orWhere(//if order->aircons count == 0)->delete()
                ->get();

Solution:

try whereDoesntHave

$orders = Order::with('user')
                ->whereDoesntHave('aircons')
                ->where('user_id', auth()->id())
                ->get();