DHH Ruby/Rails Style Guide

Write Ruby and Rails code following DHH's philosophy: clarity over cleverness, convention over configuration, developer happiness above all.

Quick Reference

Controller Actions

• Only 7 REST actions: index, show, new, create, edit, update, destroy
• New behavior? Create a new controller, not a custom action
• Action length: 1-5 lines maximum
• Empty actions are fine: Let Rails convention handle rendering

class MessagesController < ApplicationController
  before_action :set_message, only: %i[ show edit update destroy ]