limit to recent comments

app/controllers/comments_controller.rb

@@ -3,6 +3,7 @@ class CommentsController < ApplicationController
   # GET /comments.json
   def index
     @comments = Comment.all
+    @recent_comments = Comment.limit(100).order('created_at desc').all
 
     respond_to do |format|
       format.html # index.html.erb

app/views/comments/index.html.haml

@@ -1,6 +1,6 @@
 = content_for :title, "Recent comments"
 
-- @comments.reverse.each do |comment|
+- @recent_comments.each do |comment|
   %h2
     Comment on
     = link_to comment.post.subject, comment.post

spec/controllers/comments_controller_spec.rb

@@ -14,6 +14,7 @@ describe CommentsController do
       comment = Comment.create! valid_attributes
       get :index, {}
       assigns(:comments).should eq([comment])
+      assigns(:recent_comments).should eq([comment])
     end
   end
 

spec/views/comments/index.html.haml_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe "comments/index" do
   before(:each) do
     controller.stub(:current_user) { nil }
-    assign(:comments, [
+    assign(:recent_comments, [
       FactoryGirl.create(:comment),
       FactoryGirl.create(:comment, :body => 'ROFL')
     ])