When creating a program, we should always create a discount_line_product_id. Now on a product creation, if a product is not specified, the `vals` dictionary contains `discount_line_product_id: False` and the product is not created. It seems that the behavior on record creation has changed.
Introduces 2 new concepts:
Promotion programs:
===================
Using promotion programs allows you to propose to your customers:
- Promotional offers limited in time or a limited order number.
- Public code printed in advertisements, magasines, etc.
- Specific offers based on a customers group or a product set.
- A combination of the preceeding points.
You may choose to apply the program reward immediately on the sales order or to propose the reward for a next order. In the second case a coupon will be generated at the order confirmation for the customer to use it later.
Coupon programs:
================
Using coupon programs allows you to propose to your customers:
- Free products or discounts if some conditions on products or purchased amount are met.
- Promotional offers limited in time.
- Generate coupons for a customers group.
- Specific offers based on a customers group or a product set.
- A combination of the preceeding points.
A coupon is applied by entering a valid code if the program rules are met and if the reward is already in the order lines.
Yannick Tivisse