title: Rails 4.1.6 session ID
body: <p>How to get session id from a request object. 
  Below code can be used in Rails 3 to get the session ID. But this doesn't seem to be working any more in <strong>Rails 4.1.6 and Ruby 2.1.3</strong></p>
  
  <pre><code>request.session_options[:id]
  </code></pre>