博客排序采用创建时倒序

Gemfile.lock

@@ -1,5 +1,5 @@
 GEM
-  remote: http://ruby.taobao.org/
+  remote: http://rubygems.org/
   specs:
     actionmailer (3.2.6)
       actionpack (= 3.2.6)

app/controllers/blogs_controller.rb

@@ -3,14 +3,14 @@ class BlogsController < ApplicationController
   def index
     type = params[:type]
     if type or type == ""
-      @posts = Post.where(type: map[type])
+      @posts = Post.where(type: map[type]).order(:created_at => :desc )
     else
-      @posts = Post.all
+      @posts = Post.all.order(:created_at => :desc )
     end
   end
 
   def rss
-    @posts = Post.all.limit(10)
+    @posts = Post.all.order(:created_at => :desc).limit(10)
     render :layout=>false
     response.headers["Content-Type"] = "application/xml; charset=utf-8"
   end

app/models/post.rb

@@ -4,6 +4,7 @@ class Post
   LIFE = "生活"
   CREATOR = "创业"
   include Mongoid::Document
+  include Mongoid::Timestamps
   field :title, :type => String
   field :content, :type => String
   field :type, :type=> String

spec/controllers/admin/posts_controller_spec.rb

@@ -11,6 +11,6 @@ describe Admin::PostsController do
 puts 'hello world'
 ```
 EOF
-    response.body.should == "<p><code>ruby\nputs &#39;hello world&#39;\n</code></p>\n"
+    response.body.should == "<p><code>ruby<br>\nputs &#39;hello world&#39;<br>\n</code></p>\n"
   end
 end

spec/controllers/blogs_controller_spec.rb

@@ -2,4 +2,13 @@ require 'spec_helper'
 
 describe BlogsController do
 
+  it 'index should get by order desc' do
+    a = Post.new(title: '123', content: '123'*20, type: Post::TECH)
+    a.save!
+    sleep 1
+    b = Post.new(title: '1234', content: '123'*20,type: Post::TECH)
+    b.save!
+    get :index
+    assigns[:posts][1].title.should == a.title
+  end
 end