diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index 37cfed3fb..665eaa294 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -29,7 +29,7 @@ class HomeController < ApplicationController
     @subjects = Subject.where(homepage_show: 1).includes(:shixuns, :repertoire).limit(8)
 
     @tea_users = User.where(homepage_teacher: 1).includes(:user_extension).limit(10).order("experience desc")
-    @stu_users = User.includes(:user_extension).where(user_extensions: {identity: 1}).limit(10).order("experience desc")
+    @stu_users = User.where(is_test: 0).includes(:user_extension).where(user_extensions: {identity: 1}).limit(10).order("experience desc")
   end
 
   def search
diff --git a/lib/tasks/excellent_course_exercise.rake b/lib/tasks/excellent_course_exercise.rake
index 4309eec26..e05a813f4 100644
--- a/lib/tasks/excellent_course_exercise.rake
+++ b/lib/tasks/excellent_course_exercise.rake
@@ -14,7 +14,7 @@ namespace :excellent_course_exercise do
     course = Course.find_by(id: course_id)
 
     course.exercises.each_with_index do |exercise, index|
-      if exercise.exercise_users.where(commit_status: 1).count == 0
+      # if exercise.exercise_users.where(commit_status: 1).count == 0
         # 第一个试卷的参与人数和通过人数都是传的数据，后续的随机
         if index == 0
           members = course.students.order("id asc").limit(participant_count)
@@ -26,7 +26,7 @@ namespace :excellent_course_exercise do
           members = course.students.order("id asc").limit(new_participant_count)
           update_exercise_user(exercise, members, new_pass_count)
         end
-      end
+      # end
     end
   end
 
diff --git a/lib/tasks/public_message.rake b/lib/tasks/public_message.rake
index 00299cabc..e51917a2e 100644
--- a/lib/tasks/public_message.rake
+++ b/lib/tasks/public_message.rake
@@ -1,4 +1,4 @@
-# bundle exec rake sync:public_message args=149,2903
+# RAILS_ENV=production bundle exec rake sync:sigle_message args=3,-1,8848,48337,'2017-07-23','2017-10-31',1000
 namespace :sync do
   if ENV['args']
     subject_id = ENV['args'].split(",")[0] # 对应课程的id
@@ -33,7 +33,7 @@ namespace :sync do
     else
       shixun_ids = Shixun.find_by_sql("select shixun_id from stage_shixuns where stage_id in (select id from stages where
                                        subject_id=#{subject_id}) ").map(&:shixun_id)
-      discusses = Discuss.where("parent_id is null").where(dis_id: shixun_ids)
+      discusses = Discuss.where("parent_id is null and created_at between '#{start_time}' and '#{end_time}'").where(dis_id: shixun_ids)
     end
 
     discusses.each do |discuss|
diff --git a/lib/tasks/user_login.rake b/lib/tasks/user_login.rake
new file mode 100644
index 000000000..31dfbb2b4
--- /dev/null
+++ b/lib/tasks/user_login.rake
@@ -0,0 +1,28 @@
+namespace :user do
+  task :update_login => :environment do
+    begin
+      user_count = ENV['args'].split(",")[0].to_i # 更新的用户数
+      status = ENV['args'].split(",")[1] # 测试用户类型
+      base_login = ENV['args'].split(",")[2] #  基本的用户参数
+
+      users = User.where(:is_test => status).limit(user_count)
+      users.each_with_index do |user, i|
+        puts i
+
+        no = sprintf("%04d", i)
+        login = "#{base_login}#{no}"
+        puts no
+        puts login
+
+        sql1 = "update users set login='#{login}' where id=#{user.id}"
+        sql2 = "update users set lastname='#{login}' where id=#{user.id}"
+        sql3 = "update users set nickname='#{login}' where id=#{user.id}"
+        ActiveRecord::Base.connection.execute(sql1)
+        ActiveRecord::Base.connection.execute(sql2)
+        ActiveRecord::Base.connection.execute(sql3)
+      end
+    rescue Exception => e
+      Rails.logger.error(e.message)
+    end
+  end
+end
\ No newline at end of file