Hey Erwin!
Thanks for your reaction. The new button is a standard create button attached to a datagrid with this config (see screenshot)
Which then links you to a page where you can enter the number of products needed for discount and the amount of discount. The idea is here that this would be infinitely changeable and create a new unique value each time.
As for the domain model, the actual discount number (called Staffelkorting) is in my "product" entity. Together with the needed number of products for the discount (called AantalVoorKorting), both of them integers.
The page the new button links to is as follows (see screenshot)
As for the domain model, it is really chaotic but I'll share it here
Thanks for your reaction
-Wessel