user recently post

app/models/post.rb

@@ -2,7 +2,7 @@ class Post < ActiveRecord::Base
   has_many :post_tags
   has_many :tags, through: :post_tags
   belongs_to :author, class_name: 'User'
-  has_many :comments
+  has_many :comments, inverse_of: 'posts'
 
   default_scope  { order(:updated_at => :desc) }
 

app/models/user.rb

@@ -7,9 +7,13 @@ class User < ActiveRecord::Base
          :recoverable, :rememberable, :trackable, :validatable
   devise :omniauthable, omniauth_providers: [:google_oauth2]
 
-  has_many :posts
+  has_many :posts, foreign_key: 'author_id'
   has_many :comments
 
+  scope :post_recently, -> {
+    User.joins(:posts).group('id').order('posts.updated_at desc')
+  }
+
   # Device
   def self.find_for_google_oauth2(access_token, signed_in_resource = nil)
     info = access_token.info
@@ -56,4 +60,5 @@ def google_oauth_token_refresh!
       google_token_expires_at: Time.now + res_json['expires_in'].seconds
     )
   end
+
 end

app/views/flow/show.html.slim

@@ -1,11 +1,18 @@
 /! view:flow/show
 .row
+
+  h1
+    | Flow
+    small  - 最近投稿された記事
+
   .col-xs-8 role="navigation"
-    #tab-list.tab-pane.active
-      .list-group
-        - @posts.each_with_index do |post, i|
-          a.list-group-item.post-list data-post-id=post.id href="#" = post.title
+    .list-group
+      - @posts.each_with_index do |post, i|
+        a.list-group-item.post-list data-post-id=post.id href="#" = post.title
 
   .col-xs-4
-    #list_post
-      p#posts-placeholder style="color:#aaa;font-size:30px"  <-- Select a post...
+    h2
+      small 最近投稿したユーザー
+    .list-group
+      - User.post_recently.limit(10).each_with_index do |author, i|
+        a.list-group-item.post-list data-author-id=author.id href="#" = author.name