title: How to make Carrierwave add random string to the file path?
body: <p>I have this kind of hot fix:</p>
  
  <pre><code>= image_tag "#{current_candidate.profile.photo_url}?stamp=#{SecureRandom.hex}"
  </code></pre>
  
  <p>The reason for this is that I made a "crop" feature, and when users recrop their photo - old version gets displayed from browser cache.</p>
  
  <p>Anyway. </p>
  
  <p>This <code>photo_url</code> is called in many places, and rather than making a helper &amp; call it everywhere I thought it would be nice to configure uploader to do that.</p>
  
  <p>Is that possible? </p>
  
  <p>Note: filename can't be random. For other reasons.
  I would imagine it has something to do with overriding <code>photo_url</code> method.</p>