title: Using image_url helper in model
body: <p>I'm trying to use the image_url helper in my model. I also have an image_url property on the model(can't be changed). When I call image_url, the helper method it appears to be calling the method on the model. I get the error <code>wrong number of arguments (given 1, expected 0)</code></p>
  
  <pre><code> def public_image
      if self.avatar &amp;&amp; photo_public?
        self.avatar.remote_url
      else
        image_url '/client/src/assets/images/icons/anon-small.svg'
      end
    end
  </code></pre>