update method throwing error ruby on rails

NoMethodError at requests/bookmark_request


 undefined method `empty?' for #<Request:0x007f3fa44c59b0

<br />
  def bookmark_request<br />
    data = params[:d]<br />
    request_bookmarked = Request.getRequest(data)<br />
    bookmarked_against_Request = Request.first<br />
    request_bookmarked_2 = request_bookmarked<br />
    bookmarked_against_Request_2 = bookmarked_against_Request<br />
    #t = Array.new<br />
    #t << request_bookmarked[:_id]<br />
    #Rails.logger.info("Bookmark 2: #{bookmarked_against_Request_2.inspect}")<br />
    if bookmarked_against_Request_2[:favourites]<br />
      bookmarked_against_Request_2[:favourites] << bookmarked_against_Request[:id]<br />
    else<br />
      bookmarked_against_Request_2[:favourites] = Array.new<br />
      bookmarked_against_Request_2[:favourites] << bookmarked_against_Request[:id]<br />
    end  <br />
    #request_bookmarked_2[:favourites_of] << bookmarked_against_Request[:id]<br />
    #hello<br />
    #Request.updateRequest(request_bookmarked , request_bookmarked_2)<br />
    Request.updateRequest(bookmarked_against_Request , bookmarked_against_Request_2)<br />
    redirect_to :action => "active"<br />
  end<br />

<br />
 def updateRequest(request,req_data)<br />
      if request.update(req_data)<br />
        request<br />
      end<br />
    end<br />
<br />