title: default profile picture pic helper
body: <p>I am stuck on a helper method for rendering a default profile picture if one is not set on sign up. Let say I have a helper method like so:</p>
  
  <pre><code>def blank_image (user)
    base_image = ""
    if @user.image.empty?
      base_image
    else
      @user.image
    end
  end
  </code></pre>
  
  <p>what I need is the url to point <code>base_image</code> to so I know where to save this image. I am guessing assets/images but I don't know how to "spell out" the image location if that makes any sense. and also how can I implement this in my view. Thanks in advance.</p>