导出内容去除删除的

app/controllers/admins/courses_controller.rb

@@ -13,7 +13,7 @@ class Admins::CoursesController < Admins::BaseController
       format.js
       format.html
       format.xlsx do
-        @courses = courses.includes(:school, :students, :teacher_course_members, :informs, :course_videos, :attachments, :homework_commons, :course_activities, teacher: [user_extension: :department])
+        @courses = courses.not_deleted.includes(:school, :students, :teacher_course_members, :informs, :course_videos, :attachments, :homework_commons, :course_activities, teacher: [user_extension: :department])
         filename = "课堂列表_#{Time.current.strftime('%Y%m%d%H%M%S')}.xlsx"
         render xlsx: 'index', filename: filename
       end