Ruby on Rails教程中RelationshipsController的未定義方法'logged_in_user'

Question

這有點奇怪。 我正在遍歷ruby on rails教程的第十二章（以供參考： https : //www.railstutorial.org/book/following_users ），並通過了所有測試，到達了12.2.4節。 然后，我執行命令rails generate controller Relationships並在清單12.30和12.31中准確輸入了代碼，以嘗試使關系控制器測試通過，但是出現以下錯誤：

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>'

為什么看不到用戶控制器中的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

並且測試通過了，但是這種違反貫穿本教程的“不要重復自己”原則。 任何想法出什么事了嗎？

Answer 1

那是方法logged_in_user在上UsersController或ApplicationsController ？ 如果在UsersController ，則由於層次繼承，將無法訪問它。 嘗試將該方法放入ApplicationsController ，然后旋轉它。

這樣做將使UsersController和RelationshipsController可以訪問此方法，因為它們都繼承自ApplicationsController