RailsConf 2022 - Your Service Layer Needn't be Fancy, It Just Needs to Exist by David Copeland

Where would you put your business logic if not in Active Records? The answer is a service layer. Your service layer provides a seam between your user interface and your database that contains all the code that makes your app your app. This single design decision will buoy your app's sustainability for years. You'll learn why this is and how to start a service layer today without any patterns, principles, or fancy libraries.