works with 0.8.3 only
This extension creates a DiscountCode resource. discount_code belongs_to :user order has_many :discount_codes
We also will add some columns to the Order model. order.discount_code_id order.discount_total => once the discount is calculated it is stored on the order order.commission_total => likewise
The methods added: order.calculate_discount order.calculate_commission
A user can become an affiliate by adding a discount_code. @user.is_affilliate?
Not all products are created equal. When the discount_total is calculated, the method only considers products that have a taxon with a name == "Discountable"