title: How to manually load all classes inside rails application?
body: <p>How to load &amp; get collection of all active-record models used inside rails app.
  It should give classes from gems, plugins as well as subclasses having active-record base in parent hierarchy.</p>
  
  <pre><code>ActiveRecord::Base.descendants.collect(&amp;:name)
  </code></pre>
  
  <p>gives me list but its only after all classes gets loaded.
  Is there any way to load all classes inside rails app manually ?</p>