Picking the right Rails code style Yesterday I’ve seen this amazing 8 years old video October CincyRb - Jim Weirich on Decoupling from Rails . The mentioned video presents interesting way of separating App Code - business domain core logic - from infrastructure, Rails (ActiveRecord) specific code. As I understand this is called DDD - Domain Driven Design. There are multiple books about this concept. Just google them if interested. Going against the main flow - with DDD Rails concept - requires a lot of discipline and patience to learn, teach and adapt the whole team to stick to it.