title: Rails :dependent and :delete
body: <p>I am running Rails 2.0.2 and am unable to use :dependent => :delete in my AR associations</p>
  
  <pre><code> has_many :items, :dependent =&gt; :delete
  </code></pre>
  
  <p>I am given this error.</p>
  
  <pre><code>  The :dependent option expects either :destroy, :delete_all, or :nullify (:delete)
  </code></pre>
  
  <p>I have be unable to find the documentation for :delete_all to see if it does what I want. Is it basically the same thing as delete? Was :delete recently added to Rails and is not in the version I am using?</p>