title: (Ruby, Rails, AJAX) TemplateError for second-level partial during AJAX update
body: <p>Could someone please explain to me why I'm getting an ActionView::TemplateError when I try to use AJAX to update the interface while using the following code:</p>
  
  <p><a href="http://pastie.org/private/43sdzzk6naecqtpgqhwqa" rel="nofollow noreferrer">CODE</a></p>
  
  <p>I have the following structure:  Site -> Building -> Control.  Each loops through it's collection of items and renders a partial for each.  From Site to Building works just fine.  However, going from Building on to Control throws the template error.</p>
  
  <p>It is noteworthy that Controls get added just fine, and if I refresh the page, all the code works -- but for some reason when I try to do the AJAX thing, the partial (not the "rjs" file) throws an error.</p>
  
  <p>Any thoughts?  My apologies if this is too vague.</p>
  
  <p>Best.</p>
  
  <p>EDIT -- The error is as follows:
  <a href="http://pastie.org/private/r0bzxwenoktu8dm4vdwlq" rel="nofollow noreferrer">TEMPLATE ERROR</a></p>