调整

app/controllers/courses_controller.rb

@@ -747,7 +747,12 @@ class CoursesController < ApplicationController
       ActiveRecord::Base.transaction do
         course_student.destroy!
         course_teacher.update!(is_active: 1)
-        TeacherGroupRecord.create!(user_id: current_user.id, course_id: @course.id, group_id: course_student.course_group_id)
+        teacher_course_record = @course.teacher_group_records.find_by(user_id: current_user.id)
+        if teacher_course_record.present?
+          teacher_course_record.update!(group_id: course_student.course_group_id)
+        else
+          TeacherGroupRecord.create!(user_id: current_user.id, course_id: @course.id, group_id: course_student.course_group_id)
+        end
         CourseDeleteStudentDeleteWorksJob.perform_later(@course.id, [current_user.id])
       end
       normal_status(0, "切换成功")
@@ -767,7 +772,12 @@ class CoursesController < ApplicationController
       ActiveRecord::Base.transaction do
         course_student.destroy!
         course_teacher.update!(is_active: 1)
-        TeacherGroupRecord.create!(user_id: current_user.id, course_id: @course.id, group_id: course_student.course_group_id)
+        teacher_course_record = @course.teacher_group_records.find_by(user_id: current_user.id)
+        if teacher_course_record.present?
+          teacher_course_record.update!(group_id: course_student.course_group_id)
+        else
+          TeacherGroupRecord.create!(user_id: current_user.id, course_id: @course.id, group_id: course_student.course_group_id)
+        end
         CourseDeleteStudentDeleteWorksJob.perform_later(@course.id, [current_user.id])
       end
       normal_status(0, "切换成功")