def show
      @question_sheet = @answer_sheet.question_sheet
      pf = Qe.table_name_prefix
      @elements = @question_sheet.pages.collect {|p| p.elements.includes(:pages).order("#{pf}pages.number,#{pf}page_elements.position").all}.flatten
      @elements = QuestionSet.new(@elements, @answer_sheet).elements.group_by{ |e| e.pages.first }
    end
def show
      @question_sheet = @answer_sheet.question_sheet
      pf = Qe.table_name_prefix
      @elements = @question_sheet.pages.collect {|p| p.elements.includes(:pages).order("#{pf}pages.number,#{pf}page_elements.position").all}.flatten
      @elements = QuestionSet.new(@elements, @answer_sheet).elements.group_by{ |e| e.pages.first }
    end
display captured answers (read-only)