POS Partner Alternative Pricelist Load Background

This module extends the Point of Sale so that, when a customer is chosen, the system loads not only the customer's own price list but also the alternative price lists attached to it.

It works together with two other modules: one that loads a customer's price list in the background, and one that manages alternative price lists. The module adds logic to the POS session so that the background loading routine also walks through the alternative price lists of the selected price list and collects their prices for the products in the order.

• When a customer is selected, the customer's price list is loaded in the background as before.
• The alternative price lists linked to that price list are then loaded too, so their prices are available without waiting.
• If the loading is already being done for a base price list, the module does not repeat the alternative loading, avoiding duplicate work.

No new menus, screens, buttons or reports are added. The change is purely behind the scenes in the Point of Sale session handling, affecting the pos.session model and the price list data sent to the POS interface.