学生列表的排序

app/controllers/courses_controller.rb

@@ -685,12 +685,12 @@ class CoursesController < ApplicationController
 
     if order == 1
       # REDO:Extension
-      @students = @students.includes(user: :user_extension).order("user_extensions.student_id")
+      @students = @students.includes(user: :user_extension).order("user_extensions.student_id, course_members.id")
     elsif order == 2
-      @students = @students.includes(:course_group).order("course_groups.position")
+      @students = @students.includes(:course_group).order("course_groups.position, course_members.id")
     else
       # REDO:Extension
-      @students = @students.includes(user: :user_extension).order("user_extensions.student_id")
+      @students = @students.includes(user: :user_extension).order("user_extensions.student_id, course_members.id")
     end
 
     if course_group_id.present?