Rails tutorial chapter3 heroku cannot find controller StaticPagesController

问题

I have a page doesn't exist problem with my sample_app from the tutorial. I just followed all the steps and my code looks like this:

Routes

Rails.application.routes.draw do
  root 'static_pages#home'

  get 'static_pages/home'

  get 'static_pages/help'

  get 'static_pages/about'

  get 'static_pages/contact'
end

Controller - the file name is static_pages_controller.rb

class StaticPagesController < ApplicationController
  def home
  end

  def help
  end

  def about
  end

  def contact
  end
end

On GET "/" i'm getting

ActionController::RoutingError (uninitialized constant StaticPagesController)

It looks like it cannot find my controller.

Thanks for any help Andrej

来源：https://stackoverflow.com/questions/48246304/rails-tutorial-chapter3-heroku-cannot-find-controller-staticpagescontroller