title: include_root_in_json from controller
body: <p>I'm trying to return a result to a view where the json does not include the root.</p>
  
  <p>I don't want to set this on all actions for this model,so therefore am trying to avoid setting <pre>
  ActiveRecord.Base.include_root_in_json = false
  </pre></p>
  
  <p>I was hoping that I could do </p>
  
  <pre>
  @task = Tasks.all
  @task.include_root_in_json = false
  </pre>
  
  <p>To get the response I need, but that doesn't seem to be working, returning an 'undefined method include_root_in_json= for #
  
  <p>Is there a nice way of doing this??</p>