DRYing up your Rails API routes. Rails' routing gives you the ability to add multiple contraints and scopes to routes. These conditions are and'ed together. Meaning all conditions must be true for the route to match. If you want to or them, to have any condition match, you are left with duplicated code. In this example, I wanted both http://api.…

routes.rb

Rails::Application.routes.draw do

  def api_endpoints
    controller :api do
      resources :widget
      post :register
      get :help
    end
  end
  
  constraints subdomain: "api" do
    api_endpoints
  end

  scope "/api" do
    api_endpoints
  end
end