diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 3b6273465..9df7a0d6c 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -257,8 +257,8 @@ class CoursesController < ApplicationController
       user_ids = all_members.map(&:user_id)
       rank = user_ids.index(current_user.id).to_i + 1
       if rank > 10
-        current_member = all_members.select{|member| member.user_id == current_user.id}
-        @course_members << current_member
+        current_member = all_members.select{|member| member.user_id == current_user.id}.first
+        @course_members << current_member if current_member.present?
       end
     end
   end
diff --git a/app/views/courses/act_score.json.jbuilder b/app/views/courses/act_score.json.jbuilder
index ad5248649..ed6929b13 100644
--- a/app/views/courses/act_score.json.jbuilder
+++ b/app/views/courses/act_score.json.jbuilder
@@ -1,7 +1,7 @@
 json.course_members @course_members.each do |member|
-  user = User.find_by(id: member[:user_id])
+  user = member.user
   json.user_login user&.login
   json.user_name user&.real_name
   # json.course_group member.course_group_name
-  json.total_score member[:score]
+  json.total_score member.score
 end
\ No newline at end of file