Sale Coupon Promotion Product Domain Discount in Field

This is a technical bridge module that connects two existing promotion features. It does not add any new menu, screen or button; it changes how an existing discount is calculated on a sales order.

When a promotion is set to apply on specific products and a product domain is defined on the promotion, the module passes that domain to the discount calculation. As a result, only the order lines whose products match the domain receive the reward discount, while other lines keep their normal price.

• It works on sale.order through the reward discount calculation method.
• It only changes behaviour when the promotion's discount applies to specific products and a product domain is set.
• It relies on the two modules it depends on: one that stores the discount in a field and one that adds the product domain to coupon promotions.

Because it is an automatic bridge, users do not install or configure it directly; they simply configure the promotion's product domain as usual and the discount is limited to those products.