  def get_disp_ctrl
    Log.add_info(request, params.inspect)

    if params[:id] != '0'
      begin
        @folder = Folder.find(params[:id])
      rescue => evar
        @folder = nil
      end
    end

    session[:folder_id] = params[:id]

    render(:partial => 'ajax_disp_ctrl', :layout => false)
  end
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.