title: Showing which option is selected in rails dropdown
body: <p>I have this code:</p>
  
  <pre><code>%tr
    %th Parent      
    %td
      %select{ :name =&gt; "firstlevel_id", :value =&gt; "#{@s.firstlevel_id}" }
        - Firstlevel.find(:all).each do |f|
          %option{ :value =&gt; "#{f.id}" } #{f.title}
  </code></pre>
  
  <p>but even if the <code>firstlevel_id</code> is already one of the id's in the options list, it doesn't show it as selected.</p>