stock controller

app/controllers/home_controller.rb

@@ -3,7 +3,7 @@ class HomeController < ApplicationController
 
   def top
     if user_signed_in?
-      redirect_to posts_path, status: 301
+      redirect_to flow_path, status: 301
     else
       render template: 'home/login'
     end

app/decorators/tag_decorator.rb

@@ -23,6 +23,7 @@ class TagDecorator < Draper::Decorator
   # tagをtree viewで表示する
   def tree_view_node
     _html = ''
+
     _html += %Q{
       <a href="#{ self.show_path }" data-name="#{model.name}">
         #{model.name} <span class="badge">#{model.posts.count}</span>

app/models/tag.rb

@@ -10,6 +10,13 @@ class Tag < ActiveRecord::Base
 
   default_scope { order(:updated_at => :desc) }
 
+  scope :posts_exist, lambda {
+    select('tags.*, count(posts.id) as posts_count').
+    joins(:posts).
+    group('tags.id').
+    having('posts_count > 0')
+  }
+
   # 自分のタグに紐づくPostをすべて`other_tag`へ移動する
   def move_all_posts_to!(other_tag)
     self.posts.each do |_post|

app/views/stock/show.html.erb

-<h1>Stock#show</h1>
-<p>Find me in app/views/stock/show.html.erb</p>

app/views/stock/show.html.slim

+/! view:stock/show
+.row
+  #sidebar.col-xs-6.col-md-4 role="navigation"
+    #tab-tree.tab-pane
+      - cache('tag-tree', :expires_in => 1.hour) do
+        .list-group
+          = Tag.posts_exist.decorate.tree_view
+  .col-xs-12.col-sm-6.col-md-8
+    #list_post
+      p#posts-placeholder style="color:#aaa;font-size:30px"  <-- Select a post...