diff --git a/lib/tasks/public_course_sync.rake b/lib/tasks/public_course_sync.rake
index 928cd9113..a22a9f1f8 100644
--- a/lib/tasks/public_course_sync.rake
+++ b/lib/tasks/public_course_sync.rake
@@ -1,5 +1,5 @@
 #coding=utf-8
-# 执行示例  bundle exec rake public_course:student args=149,2903
+# 执行示例  RAILS_ENV=production bundle exec rake public_classes:student args=3,3056,'2019-03-01','2019-03-31',10,1
 # args 第一个参数是subject_id，第二个参数是课程course_id
 # 第一期时间：2018-12-16 至2019-03-31
 # 第二期时间：2019-04-07 至2019-07-28
@@ -22,10 +22,13 @@ namespace :public_classes do
   task :student => :environment do
     puts "subject_id is #{subject_id}"
     puts "course_id is #{course_id}"
+    puts "start time is #{start_time}"
+    puts "end time is #{end_time}"
+    puts "limt is #{limit}"
 
-    user_ids = Myshixun.find_by_sql("select distinct(user_id) from myshixuns where created_at between #{start_time} and #{end_time} and shixun_id in (select shixun_id from stage_shixuns
+    user_ids = Myshixun.find_by_sql("select distinct(user_id) from myshixuns where created_at between '#{start_time}' and '#{end_time}' and shixun_id in (select shixun_id from stage_shixuns
                                      where stage_id in (select id from stages where subject_id=#{subject_id})) limit #{limit}").map(&:user_id)
-    puts user_ids
+    puts "user_ids count is #{user_ids.count}"
     if user_ids.present?
       user_ids.each do |user_id|
         puts user_id
@@ -39,8 +42,8 @@ namespace :public_classes do
   end
 
   task :test_user => :environment do
-    users = User.where(is_test: true)
-    users.limit(limit).find_each do |user|
+    users = User.where(is_test: true).limit(limit)
+    users.find_each do |user|
       puts user.id
       CourseMember.create!(course_id: course_id, user_id: user.id, role: 4)
     end
diff --git a/lib/tasks/public_message.rake b/lib/tasks/public_message.rake
index 9b2f89224..00299cabc 100644
--- a/lib/tasks/public_message.rake
+++ b/lib/tasks/public_message.rake
@@ -1,30 +1,22 @@
 # bundle exec rake sync:public_message args=149,2903
 namespace :sync do
-  task :public_message => :environment do
+  if ENV['args']
     subject_id = ENV['args'].split(",")[0] # 对应课程的id
     shixun_id = ENV['args'].split(",")[1] # 对应课程的id
     board_id = ENV['args'].split(",")[2]
     message_id = ENV['args'].split(",")[3]
-    status = ENV['args'].split(",")[4] # 表示相应的期数
-
-    if status.to_i == 1
-      start_time = '2018-12-16'
-      end_time = '2019-04-01'
-    elsif status.to_i == 2
-      start_time = '2019-04-07'
-      end_time = '2019-07-28'
-    else
-      # 这种情况是取所有的
-      start_time = '2015-01-01'
-      end_time = '2022-07-28'
-    end
+    start_time = ENV['args'].split(",")[4] # 表示课程模块
+    end_time = ENV['args'].split(",")[5] # 表示课程模块
+    limit = ENV['args'].split(",")[6] # 限制导入的数量
+  end
 
+  task :public_message => :environment do
     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(dis_id: shixun_ids).where("created_at >? and created_at <?", start_time, end_time)
     if discusses.present?
-      discusses.find_each do |discuss|
+      discusses.limit(limit).find_each do |discuss|
         puts discuss.user_id
         puts board_id
         puts message_id
@@ -35,23 +27,6 @@ namespace :sync do
   end
 
   task :sigle_message => :environment do
-    subject_id = ENV['args'].split(",")[0] # 对应课程的id
-    shixun_id = ENV['args'].split(",")[1] # 对应课程的id
-    board_id = ENV['args'].split(",")[2]
-    message_id = ENV['args'].split(",")[3]
-    status = ENV['args'].split(",")[4] # 表示相应的期数
-
-    if status.to_i == 1
-      start_time = '2018-12-16'
-      end_time = '2019-04-01'
-    elsif status.to_i == 2
-      start_time = '2019-04-07'
-      end_time = '2019-07-28'
-    else
-      # 这种情况是取所有的
-      start_time = '2015-01-01'
-      end_time = '2022-07-28'
-    end
 
     if subject_id.to_i == -1
       discusses = Discuss.where("parent_id is null and dis_id=?", shixun_id)
@@ -119,18 +94,8 @@ namespace :sync do
     end
   end
 
-  task :board_count => :environment do
-    Course.find_each do |course|
-      puts course.id
-
-      begin
-        messages_count = Message.find_by_sql("select count(*) as count from messages where board_id in (select id from boards where course_id=#{course.id})").first.try(:count)
-
-        Board.update_column(messages_count: messages_count)
-      rescue
-
-      end
-
-    end
+  task :delete_boards => :environment do
+    course = Course.find(course_id)
+    course.boards.destroy
   end
 end