Adding custom attribute to API response in Magento 2
Magento 2 implements the service contracts design pattern – a set of PHP interfaces that are defined for a module. A service contract includes service and data interfaces, which hide business logic details from service requestors such as controllers, web services, and other modules.
Event system in Magento 1 vs. Magento 2
We are going to talk about event system approach in development. The event is a very flexible way to extend application logic. This approach is actual in both Magento 1 and Magento 2. Let’s go ahead and check how it works.