Hexagonal Architecture in Rails: A Path to Decoupling

2024-12-13

This article explores implementing Hexagonal Architecture (Ports and Adapters pattern) in Rails applications. The author initially struggled with the pattern until realizing that 'adapter' directly refers to the Gang of Four Adapter Pattern. The article details inbound and outbound ports, and how adapters decouple application logic from external services (databases, logging, email, etc.). Rails controllers can serve as HTTP adapters, but the author stresses avoiding direct ActiveRecord usage. Instead, custom repositories access data, improving decoupling and maintainability. The article concludes by encouraging Rails developers to adopt Hexagonal Architecture for more robust and maintainable applications.