Ruby on Rails教程中RelationshipsController的未定义方法'logged_in_user'

Question

这有点奇怪。 我正在遍历ruby on rails教程的第十二章（以供参考： https : //www.railstutorial.org/book/following_users ），并通过了所有测试，到达了12.2.4节。 然后，我执行命令rails generate controller Relationships并在清单12.30和12.31中准确输入了代码，以尝试使关系控制器测试通过，但是出现以下错误：

ERROR["test_destroy_should_require_logged-in_user", RelationshipsControllerTest, 2015-11-13 11:07:25 +0000]
 test_destroy_should_require_logged-in_user#RelationshipsControllerTest (1447412845.16s)
NoMethodError:         NoMethodError: undefined method `logged_in_user' for #<RelationshipsController:0x000000044f5bd8>
            test/controllers/relationships_controller_test.rb:14:in `block (2 levels) in <class:RelationshipsControllerTest>'
            test/controllers/relationships_controller_test.rb:13:in `block in <class:RelationshipsControllerTest>'
        test/controllers/relationships_controller_test.rb:14:in `block (2 levels) in <class:RelationshipsControllerTest>'
        test/controllers/relationships_controller_test.rb:13:in `block in <class:RelationshipsControllerTest>'

ERROR["test_create_should_require_logged-in_user", RelationshipsControllerTest, 2015-11-13 11:07:25 +0000]
 test_create_should_require_logged-in_user#RelationshipsControllerTest (1447412845.22s)
NoMethodError:         NoMethodError: undefined method `logged_in_user' for #<RelationshipsController:0x00000004db9990>
            test/controllers/relationships_controller_test.rb:7:in `block (2 levels) in <class:RelationshipsControllerTest>'
            test/controllers/relationships_controller_test.rb:6:in `block in <class:RelationshipsControllerTest>'
        test/controllers/relationships_controller_test.rb:7:in `block (2 levels) in <class:RelationshipsControllerTest>'
        test/controllers/relationships_controller_test.rb:6:in `block in <class:RelationshipsControllerTest>'

为什么看不到用户控制器中的logging_in_user方法？ 我可以把它放在

class RelationshipsController < ApplicationController
  before_action :logged_in_user

  def create
    user = User.find(params[:followed_id])
    current_user.follow(user)
    redirect_to user
  end

  def destroy
    user = Relationship.find(params[:id]).followed
    current_user.unfollow(user)
    redirect_to user
  end

  private

    # Confirms a logged-in user.
    def logged_in_user
      unless logged_in?
        store_location
        flash[:danger] = "Please log in."
        redirect_to login_url
      end
    end
end

并且测试通过了，但是这种违反贯穿本教程的“不要重复自己”原则。 任何想法出什么事了吗？

Answer 1

那是方法logged_in_user在上UsersController或ApplicationsController ？ 如果在UsersController ，则由于层次继承，将无法访问它。 尝试将该方法放入ApplicationsController ，然后旋转它。

这样做将使UsersController和RelationshipsController可以访问此方法，因为它们都继承自ApplicationsController