学校的课堂统计bug

app/controllers/colleges_controller.rb

@@ -105,7 +105,7 @@ class CollegesController < ApplicationController
     @courses = paginate courses
 
     course_ids = @courses.map(&:id)
-    @student_count     = StudentsForCourse.where(course_id: course_ids).group(:course_id).count
+    @student_count     = CourseMember.where(course_id: course_ids, role: 4).group(:course_id).count
     @shixun_work_count = HomeworkCommon.where(homework_type: 4, course_id: course_ids).group(:course_id).count
     @attachment_count  = Attachment.where(container_id: course_ids, container_type: 'Course').group(:container_id).count
     @message_count     = Message.joins(:board).where(boards: { parent_id: 0, course_id: course_ids }).group('boards.course_id').count