diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index df23b6b25..66682e30f 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -27,7 +27,7 @@ class CoursesController < ApplicationController
   before_action :teacher_allowed, only: [:update, :destroy, :settings, :search_teacher_candidate,
                                          :transfer_to_course_group, :delete_from_course,
                                          :search_users, :add_students_by_search, :get_historical_courses, :add_teacher_popup, :add_teacher]
-  before_action :admin_allowed, only: [:set_invite_code_halt, :set_public_or_private,
+  before_action :admin_allowed, only: [:set_invite_code_halt, :set_public_or_private, :join_graduation_group,
                                        :set_course_group, :change_course_admin, :change_course_teacher,
                                        :delete_course_teacher, :teacher_application_review, :create_group_by_importing_file]
   before_action :teacher_or_admin_allowed, only: [:graduation_group_list, :create_graduation_group, :join_graduation_group,
diff --git a/app/models/graduation_work.rb b/app/models/graduation_work.rb
index 11255ce4e..a99a18b2a 100644
--- a/app/models/graduation_work.rb
+++ b/app/models/graduation_work.rb
@@ -53,7 +53,7 @@ class GraduationWork < ApplicationRecord
 
   # 分班名
   def class_grouping_name
-    CourseMember.find_by(user_id: self.user_id, course_id: self.course_id).try(:course_group).try(:name) || '未分班'
+    CourseMember.find_by(user_id: self.user_id, course_id: self.course_id, role: 4).try(:course_group).try(:name) || '未分班'
   end
 
   # 分组名
diff --git a/app/views/graduation_tasks/tasks_list.json.jbuilder b/app/views/graduation_tasks/tasks_list.json.jbuilder
index c36526ceb..fe7ffddc4 100644
--- a/app/views/graduation_tasks/tasks_list.json.jbuilder
+++ b/app/views/graduation_tasks/tasks_list.json.jbuilder
@@ -32,7 +32,7 @@ if @task.published? || @user_course_identity < Course::STUDENT
     json.array! @work_list do |work|
       json.id work.id
       json.user_id work.user.id
-      json.name work.user.full_name
+      json.name work.user.real_name
       json.student_id work.user.student_id
       json.class_grouping_name work.class_grouping_name
       if @task.have_grouping?