Disqus Ajax is not taking different thread for diffrent posts in ruby on rails

I have one rails application where I am using Disqus Universal Code for comment function. I am using ajax remote => true function to display my posts content. Here is my disqus code

 <div id="disqus_thread"></div>
   <script type="text/javascript">
      var disqus_shortname = 'ginfy';
      var disqus_identifier = '<%= @posts.id %>';
      (function() {
        var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
        dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js';
        (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
    })();
  </script>
  <noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript> 

I know that Disqus depends on Site URL and it takes different thread based on different URL but here i am using AJAX [No CHANGE IN URL]. check my erb-

<%= link_to "Read more","prayers/#{posts_item.id}",:remote => "true" %>

When I click on read more then Disqus always open with same Thread. I want Different disqus thread for different posts without sacrificing my Ajax functionality.

I already checked all the question related to this problem but nothing gave me solution. Please help me.

You'll need to use the Disqus.reset function when you want to change the thread. Something like the following would work:

<script type="text/javascript">
    var changeThread = function(){

        DISQUS.reset({
          reload: true,
          config: function () {  
            this.page.identifier = 'new_disqus_identifier';
            this.page.url = 'http://example.com/#!new_content';
            this.page.title = "New Page Title";
            this.language = "fr"; // only if changing the language
          }
        });

    };
</script>

<button onclick=changeThread();>Change the Disqus thread!</button>

<div id="disqus_thread"></div>
    <script type="text/javascript">
        var disqus_shortname = 'ginfy';
        var disqus_identifier = '<%= @posts.id %>';
        (function() {
            var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
            dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js';
            (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
        })();
    </script>
<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>