diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index ff4dc6be9..2761523a6 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1278,14 +1278,8 @@ class ExercisesController < ApplicationController
 
           #搜索
           if params[:search].present?
-            search_content = params[:search]
-            #搜索用户的nickname,如果存在则返回，否则继续查询用户的真实姓名或学生号
-            nick_name_search = @exercise_users_list.where(user_id: User.where('CONCAT(users.lastname, users.firstname) like ?',"%#{search_content}%"))
-            if nick_name_search.present?
-              @exercise_users_list = nick_name_search
-            else
-              @exercise_users_list = @exercise_users_list.joins(user: [:user_extension]).where('user_extensions.student_id like ? OR user_extensions.student_realname like ?',"%#{search_content}%","%#{search_content}%")
-            end
+
+            @exercise_users_list = @exercise_users_list.joins(user: :user_extension).where("CONCAT(lastname, firstname) like ? OR student_id like ?", "%#{params[:search]}%", "%#{params[:search]}%")
           end
 
           @export_ex_users = @exercise_users_list
diff --git a/app/controllers/polls_controller.rb b/app/controllers/polls_controller.rb
index cd9679972..90ca1778e 100644
--- a/app/controllers/polls_controller.rb
+++ b/app/controllers/polls_controller.rb
@@ -1026,13 +1026,9 @@ class PollsController < ApplicationController
 
           #搜索
           if search_content.present?
-            #搜索用户的nickname,如果存在则返回，否则继续查询用户的真实姓名或学生号
-            nick_name_search = @poll_users_list.where(user_id: User.where('CONCAT(users.lastname, users.firstname) like ?',"%#{search_content}%"))
-            if nick_name_search.present?
-              @poll_users_list = nick_name_search
-            else
-              @poll_users_list = @poll_users_list.joins(user: [:user_extension]).where('user_extensions.student_id like ? OR user_extensions.student_realname like ?',"%#{search_content}%","%#{search_content}%")
-            end
+
+            @poll_users_list = @poll_users_list.joins(user: :user_extension).where("CONCAT(lastname, firstname) like ? OR student_id like ?", "%#{search_content}%", "%#{search_content}%")
+
           end
 
           @poll_users_size = @poll_users_list.count