@ -196,7 +196,7 @@ class HomeworkCommonsController < ApplicationController
if params[:format] == "xlsx"
if @user_course_identity >= Course::STUDENT
tip_exception(403, "无权限操作")
elsif @work_excel.size == 0
elsif @work_excel.blank? || @work_excel.size == 0
normal_status(-1,"暂无用户提交!")
else
respond_to do |format|