title: get the params from the querystring
body: <p>In Rails, I have a question on how to get the multiple params ! 
  for example:
    the string in log like this</p>
  
  <pre><code> Processing ConfigurationsController#emergency_config (for 192.168.1.124 at 2010-05-31 11:45:53) [POST]
    Parameters: {"authenticity_token"=&gt;"I3GPKyrjmDRLkMIxFVS/47mgEI4ETO/+YW+R8R5Q2GM=", "tid"=&gt;"1", "emergency"=&gt;{"department"=&gt;["1", "2", "3", "4", "5", "6", "7", "8"]}}
  </code></pre>
  
  <p>so,how can i get the department values from it? who can tell me the answer? thank you!</p>