title: How can I set default parameter value in routing in rails 3
body: <p>How can I set default parameter value in routing in Rails 3.
  For example I have this route</p>
  
  <pre><code>match ':slug/:id/:direction' =&gt; 'quiz#show', :as =&gt; :quiz_details, :direction =&gt; "next"
  </code></pre>
  
  <p>and I want to default the value of direction to <code>next</code>.</p>