How to sort products by discounts?

Question

1C-Bitrix

Good evening!
Tell me how to sort goods by discounts, sorted by all the necessary fields, but sorting goods that have discounts does not work.

Answer 1

Create a property like Yes/No. Hang up the handler for changing||adding||deleting prices||discounts and if the discount works, then set the property Yes for this, and by default write No.