title: Rails find :conditions
body: <p>I have a <code>Reservation</code> model that I'm searching for with three fields. The <code>container_id</code> must always be <code>self.id</code> but as <code>confirmed</code> and <code>auto_confirmed</code> only one needs to be true. I have the following but it doesn't perform what I need: </p>
  
  <pre><code>Reservation.find(:all, 
  :conditions =&gt; ['container_id = ? AND confirmed = ? OR auto_confirm = ?', 
  self.id, true, true,])
  </code></pre>
  
  <p>How should I change this?</p>