Domain-oriented Rails file structures

add_view_paths.rb

module Ridesharing
  class DriverController
    append_view_path(‘app/domains’)
  end
end

class_refactoring.rb

# Before
module Ridesharing
  class Vehicle
    belongs_to :driver
  end
end

# After:
module Ridesharing
  class Vehicle
    belongs_to :driver, class_name: "Ridesharing::Driver"
  end
end

domain_oriented_folders

app/
  domains/
    ridesharing/
      driver.rb
      driver_controller.rb
      drivers/
        show.html.haml

final_folder_structure

app/
  domains/
    ridesharing/
      vehicle.rb
      vehicles_controller.rb
      trip.rb
      service_tier.rb
      trip_price.rb
      ...
    marketing/
      campaign.rb
      campaigns_controller.rb
      contact.rb
      ...
    customer_support/
      issue.rb
      issues_controller.rb
      ...
    identity/
      user.rb
      users_controller.rb
      role.rb
      session.rb
      ...
    ecommerce/
      payment.rb
      payments_controller.rb
      charge.rb
      invoice.rb
      pricing_tier.rb
      ...

modulize_classes.rb

# Before:
class Driver < ActiveRecord::Base
end

# After:
module Ridesharing
  class Driver < ActiveRecord::Base
  end
end

original

app/
  models/
    driver.rb
  controllers/
    driver_controller.rb
  views/
    drivers/
      show.html.haml