Best way to save a ordered List to the Database while keeping the ordering

Question

I was wondering if anyone has a good solution to a problem I\'ve encountered numerous times during the last years.

I have a shopping cart and my customer explicitly

Answer 1

I solved it pragmatically like this:

1. The order is defined in the UI.

2. The backend gets a POST request that contains the IDs and the corresponding Position of every item in the list.

3. I start a transaction and update the position for every ID.

Done.

So ordering is expensive but reading the ordered list is super cheap.