title: Change name of mongoid relations (embeds_...,belongs_to,has_...)
body: <p>When you have a relation such as <code>embeds_many :album_items</code> which relates to the <code>AlbumItem</code> model. How can I have it stored in just <code>items</code>. I tried <code>embeds_many :album_items, :as =&gt; :items</code> and <code>embeds_many :items, :class_name =&gt; AlbumItem</code>. Neither worked.</p>
  
  <p>How can I go about renaming the relation?</p>
  
  <p>Thanks</p>