Example of nesting routes in rails

routes.rb

Rails.application.routes.draw do 
  concern :reviewable do
    resources :reviews, only: [:new, :create, :index]
  end

  resources :reviews, only: [:show, :delete, :edit, :update]

  resources :artists, :albums, :songs, :lyrics, only: [], concerns: :reviewable

  resources :artists do
    resources :albums, shallow: true do
      resources :songs, shallow: true do
        resources :lyrics, shallow: true
      end
    end
  end
end