title: i18n fallback in attributes
body: <p>How to use a fallback for very often used <code>attr_names</code> like <code>title</code> and <code>created_at</code>?</p>
  
  <p>How it usually works:</p>
  
  <pre><code>activerecord.attributes.[model_name].attr_name
  </code></pre>
  
  <p>I want todo something like that:</p>
  
  <pre><code>activerecord.attributes.defaults.attr_name
  </code></pre>
  
  <p>There are so many examples of how to do it for the error massages, but none for the plain attributes :( <a href="http://guides.rubyonrails.org/v2.3.8/i18n.html#translations-for-active-record-models" rel="nofollow">http://guides.rubyonrails.org/v2.3.8/i18n.html#translations-for-active-record-models</a></p>