Interactor

Interactors enforce single-purpose units named after business actions, making code self-documenting and reducing controller bloat, as shown in the AuthenticateUser example.

Organizers run multiple interactors in order and automatically roll back completed ones on failure, demonstrated in the PlaceOrder organizer with destroy rollbacks.

Each interactor can be tested in isolation by stubbing dependencies, as recommended in the testing section with RSpec examples focusing on context changes.

The context.fail! method provides a consistent way to handle errors without exceptions, simplifying controller logic and response handling.