Learn about adjusting prices in Umbraco Commerce.
In some cases, you may want to tweak the figures of an order. It could be reducing the price of a product if a customer purchases a given amount of a product. To handle this, Umbraco Commerce has the concept of Price/Amount Adjustments. What adjustments allow you to do is create a record/log of any changes that occur to a price/amount throughout the calculation process. Umbraco Commerce uses the adjustments in the calculation process to work out its final pricing and provides this list of the adjustments on the order. This makes it clear exactly how the price was calculated.
Umbraco Commerce has two types of adjustments:
Price Adjustment - Adjusts one of the orders' price properties (discounts, fees).
Amount Adjustment - Adjusts the final transaction amount of the order (gift cards, loyalty points).
Adjustments are applied using a IPriceAdjuster or IAmountAdjuster with developers able to create their own adjusters to apply custom adjustments.
Adjusters apply adjustments to the given price they wish to affect. Adjustments are strongly typed and each adjuster should define their own adjustment type, providing properties to collect any relevant information for the adjustment. This "metadata" gets serialized with the adjustment as is constantly available when accessing the given adjustment.
Adjustments inherit from either PriceAdjustment<TSelf> or AmountAdjustment<TSelf> depending on the type of adjustment being applied. Both base classes follow a similar structure, the difference being whether the adjustment value is a Price or Amount.
Once defined, the adjuster should be registered with the DI container to enable Umbraco Commerce to be aware of it and include it in the calculation process.