Adding the Disqus comment system to a Rails 3 application

 step 1  
 gem install disqus  
 step2  
 add in application.rb(user should registered to consume service)  
 config.after_initialize do  
   Disqus::defaults[:account] = "youraccountname"  
   Disqus::defaults[:developer] = true  
   Disqus::defaults[:container_id] = "disqus_thread"  
   Disqus::defaults[:show_powered_by] = false  
   end  
  step3  
  add this to view file(example: show.html.erb)  
 <div id ="disqus_thread">  
 <% = raw disqus_thread %>  
 </div>  
 start the server and check.....