ログアウト

app/controllers/application_controller.rb

@@ -3,4 +3,12 @@ class ApplicationController < ActionController::Base
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
 
+
+  def require_login
+    unless user_signed_in?
+      flash[:alert] = 'You need Login!'
+      redirect_to root_path
+    end
+  end
+
 end

app/controllers/posts_controller.rb

 class PostsController < ApplicationController
+
   before_action :set_post, only: [:show, :edit, :update, :destroy]
+  before_action :require_login, except: [:index]
 
   include ApplicationHelper
 

app/helpers/posts_helper.rb

@@ -3,7 +3,7 @@ module PostsHelper
   # @param {ActiveRecord::Relation} node
   def h_display_tree(node)
     _html = '<ul>'
-    _html << %Q{<li><a href="#{ root_path(q: '#' + node.name) }">#{node.name}<a/></li>}
+    _html << %Q{<li><a href="#{ root_path(q: '#' + node.name) }">#{node.name}</a></li>}
     node.children.each do |_child|
       _html << h_display_tree(_child)
     end