diff --git a/lib/tasks/public_course.rake b/lib/tasks/public_course.rake
index 0f10b84ad..6a16fcd3b 100644
--- a/lib/tasks/public_course.rake
+++ b/lib/tasks/public_course.rake
@@ -58,7 +58,7 @@ namespace :public_course do
 
 
   # 更新某个课程的某类时间
-  # 执行示例  bundle exec rake public_course:time args=-1,2932,1,1
+  # 执行示例  RAILS_ENV=production bundle exec rake public_course:time args=-1,2932,1,1
   task :time => :environment do
     # course_id = ENV['args'].split(",")[0] # 对应课堂的id
     # type = ENV['args'].split(",")[1]
@@ -70,13 +70,13 @@ namespace :public_course do
       # 讨论区
       created_on = random_time start_time, end_time
       messages = Message.where(board_id: course.boards)
-      message_details = MessageDetail.where(message_id: messages)
-      messages.update_columns(created_on: created_on, updated_on: created_on)
-      message_details.update_columns(created_at: created_on, updated_at: created_on)
-
+      messages.each do |message|
+        message.update_columns(created_on: created_on, updated_on: created_on)
+        MessageDetail.where(message_id: message.id).update_all(created_at: created_on, updated_at: created_on)
+      end
     when 2
       # 作业
-        course.homework_commons.each do |homework|
+      course.homework_commons.each do |homework|
         created_at = random_time(start_time, end_time)
         publish_time = random_larger_time created_at, start_time, end_time
         end_time = random_larger_time publish_time, start_time, end_time
diff --git a/lib/tasks/user.rake b/lib/tasks/user.rake
new file mode 100644
index 000000000..8cd1d90ae
--- /dev/null
+++ b/lib/tasks/user.rake
@@ -0,0 +1,86 @@
+# add test user
+namespace :sync do
+  task :add_user => :environment do
+    DCODES = %W(2 3 4 5 6 7 8 9 a b c f e f g h i j k l m n o p q r s t u v w x y z)
+    user_count = ENV['args'].split(",")[0].to_i # 用户数
+    rand_chart = ENV['args'].split(",")[1] # 手机号或者邮箱等前面的随机数
+
+    puts rand_chart
+    puts user_count
+
+    (1..user_count).each do |i|
+      puts i
+
+      no = sprintf("%04d", i)
+      phone = "#{rand_chart}160731#{no}"
+      mail = "#{rand_chart}#{no}@educoder.net"
+      code = generate_identifier User, 8
+      login = "m" + code
+
+
+      l = "赵,钱,孙,李,周,吴,郑,王,冯,陈,褚,卫,蒋,沈,韩,杨,朱,秦,尤,许,何,吕,施,张,孔,曹,严,华,金,魏,陶,姜,黄".split(",")
+      f = "爱童,安妮,若婷,安煜,博,雷,梅,静,士红,大龙,冰波,慧娟,梅,婧婧,军,淋,真,维,涛,程程,
+        谷南,慕儿,夏岚,友儿,小萱,紫青,妙菱,冬寒,曼柔,语蝶,青筠,夜安,觅海,问安,晓槐,雅山,访云,翠容,寒凡,晓绿,以菱,
+        冬云,含玉,访枫,含卉,夜白,冷安,灵竹,醉薇,元珊,幻波,盼夏,元瑶,迎曼,水云,访琴,谷波,乐之,笑白,之山,妙海,紫霜,
+        平夏,凌旋,孤丝,怜寒,向萍,凡松,青丝,翠安,如天,凌雪,绮菱,代云,南莲,寻南,春文,香薇,冬灵,凌珍,采绿,天春,沛文,
+        紫槐,幻柏,采文,春梅,雪旋,盼海,映梦,安雁,映容,凝阳,访风,天亦,平绿,盼香,觅风,小霜,雪萍,半雪,山柳,谷雪,靖易,
+        白薇,梦菡,飞绿,如波,又晴,友易,香菱,冬亦,问,妙春,海冬,半安,平春,幼柏,秋灵,凝芙,念烟,白山,从灵,尔芙,迎蓉,
+        念寒,翠绿,翠芙,靖儿,妙柏,千凝,小珍,天巧,妙旋,雪枫,夏菡,元绿,痴灵,绮琴,雨双,听枫,觅荷,凡之,晓凡,雅彤,香薇,
+        孤风,从安,绮彤,之玉,雨珍,幻丝,代梅,香波,青亦,元菱,海瑶,飞槐,听露,梦岚,幻竹,新冬,盼翠,谷云".split(",")
+
+      lastname = l[rand(l.length)].strip + f[rand(f.length)].strip
+
+      edit_params = {
+          login: login,
+          admin: false,
+          type: User,
+          phone: phone,
+          lastname: lastname,
+          mail: mail,
+          authentication: 1,
+          professional_certification: 1,
+          profile_completed: true,
+          is_test: true
+      }
+      User.create!(edit_params)
+      puts "aa"
+      UserExtension.create!(user_id: @user.id, school_id: 117)
+      puts i
+    end
+
+
+    user = User.new(admin: false, login: login, mail: email, phone: phone, type: "User")
+    user.password = "edu12345678"
+    # 现在因为是验证码，所以在注册的时候就可以激活
+    user.status = 1
+    # 必须要用save操作，密码的保存是在users中
+    if user.save!
+      # todo user_extension
+      UserExtension.create!(user_id: @user.id)
+
+      # 注册时，记录是否是引流用户
+      ip = request.remote_ip
+      ua = UserAgent.find_by_ip(ip)
+      ua.update_column(:agent_type, UserAgent::USER_REGISTER) if ua
+      successful_authentication(@user)
+      session[:user_id] = @user.id
+      normal_status("注册成功")
+    end
+  end
+
+  # 随机生成字符
+  def generate_identifier(container, num)
+    code = DCODES.sample(num).join
+    if container == User
+      while container.exists?(login: code) do
+        code = DCODES.sample(num).join
+      end
+    else
+      while container.exists?(identifier: code) do
+        code = DCODES.sample(num).join
+      end
+    end
+    code
+  end
+
+end
\ No newline at end of file