title: Rails 4 - how do I get the images path of an image in production with a hash on the end?
body: <p>I want to reference an image in the public folder that has been precompiled in prod. But, it seems that all the images have a hash on the end. (i.e., assets/image-3414fewafe313.jpg)</p>
  
  <p>asset_path(photo) = assets/photo.jpg (i need the full image path with hash)</p>
  
  <p>How do I reference this image in a view in Rails? Thanks!</p>