diff --git a/LocalReadMe.md b/LocalReadMe.md
index 1752c37b0..5b9abf9a7 100644
--- a/LocalReadMe.md
+++ b/LocalReadMe.md
@@ -18,4 +18,7 @@
         educoder 123456789
     9、 需要导入的TPM版本库：
         在mysql中：select repo_name from shixuns;
-        将mysql输出的结果交给运维使用脚本一建导入
\ No newline at end of file
+        将mysql输出的结果交给运维使用脚本一建导入
+        
+    10、 关于实训的附件问题：
+        select * from attachments where container_type='Shixun' and container_id in(select distinct(c.id) from subjects s join stage_shixuns ss on ss.subject_id = s.id join shixun_mirror_repositories smr on smr.shixun_id = ss.shixun_id join mirror_repositories mr on mr.id = smr.mirror_repository_id join challenges c on c.shixun_id = ss.shixun_id where s.id in(406, 51, 388, 408, 413, 411, 412, 410, 405, 407, 414));
\ No newline at end of file
diff --git a/app/controllers/initialization_data_controller.rb b/app/controllers/initialization_data_controller.rb
index 68f679ac1..3dc695bbb 100644
--- a/app/controllers/initialization_data_controller.rb
+++ b/app/controllers/initialization_data_controller.rb
@@ -9,13 +9,23 @@ class InitializationDataController < ApplicationController
     logger.info("#########{origin_database}")
     raise("请配置原始数据库") if origin_database.blank?
     raise("请配置本地数据库") if database.blank?
-    # 获取原始数据库导入数据
+    # 获取原始数据库导入数据 TODO: 附件同步问题。 attachemnts表
     get_origin_data origin_database, paths
     # 创建初始数据
     create_init_data database
     normal_status("初始化数据成功！")
   end
 
+  def clear_test_data
+    # 删除测试数据.
+    ActiveRecord::Base.transaction do
+      User.where("id > 2").destroy_all
+      Myshixun.where(user: 1).destroy_all
+      Course.where(tea_id: 1).destroy_all
+      normal_status("初始化数据成功！")
+    end
+  end
+
   def get_origin_data origin_database, paths
     connect_to_origin_date(origin_database)
     get_subject_data(paths)
diff --git a/app/models/user.rb b/app/models/user.rb
index 12759ea4d..4ff85b2d5 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -36,7 +36,7 @@ class User < ApplicationRecord
   has_many :myshixuns, :dependent => :destroy
   has_many :study_shixuns, through: :myshixuns, source: :shixun   # 已学习的实训
   has_many :course_messages
-  has_many :courses, dependent: :destroy
+  has_many :courses, foreign_key: :tea_id, dependent: :destroy
 
   #试卷
   has_many :exercise_banks, :dependent => :destroy
@@ -108,8 +108,8 @@ class User < ApplicationRecord
   has_many :manage_courses, through: :manage_course_members, source: :course
 
   # 关注
-  has_many :be_watchers, foreign_key: :user_id, dependent: :destroy # 我的关注
-  has_many :be_watcher_users, through: :be_watchers, dependent: :destroy # 我关注的用户
+  #has_many :be_watchers, foreign_key: :user_id, dependent: :destroy # 我的关注
+  #has_many :be_watcher_users, through: :be_watchers, dependent: :destroy # 我关注的用户
 
   # 认证
   has_many :apply_user_authentication
diff --git a/config/routes.rb b/config/routes.rb
index d17235737..9dd3d6c15 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -33,7 +33,11 @@ Rails.application.routes.draw do
       end
     end
 
-    resources :initialization_data
+    resources :initialization_data do
+      collection do
+        get :clear_test_data
+      end
+    end
     resources :tem_tests
     # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
     #