Rails Classic Coding Style

Write Rails application code following 37signals conventions. Rich domain models, CRUD controllers, database-backed everything, Minitest with fixtures.

Core Workflow

1. Use generators first — rails g model, rails g controller, rails g migration. Generators produce correct file structure, test stubs, and route entries in one shot.
2. Implementation order — models → controllers → views → tests.
3. Ship, Validate, Refine — prototype to production, learn from real usage.
4. Let it crash — use bang methods, let Rails handle RecordInvalid with 422s.

Guardrails

• No service objects — use domain models namespaced under app/models/
• No custom controller actions — create new resources instead (REST mapping)
• No RSpec, no factory_bot — Minitest with fixtures only