diff --git a/app/models/forge_message.rb b/app/models/forge_message.rb
index 0dce57598..8bf754719 100644
--- a/app/models/forge_message.rb
+++ b/app/models/forge_message.rb
@@ -1,14 +1,7 @@
 class ForgeMessage < ActiveRecord::Base
-  # 公共表中活动类型,命名规则:TYPE_OF_{类名}_ACT
-  TYPE_OF_ISSUE_ACT = "Issue"
-  TYPE_OF_MESSAGE_ACT = "Message"
-  TYPE_OF_ATTACHMENT_ACT = "Attachment"
-  TYPE_OF_DOCUMENT_ACT = "Document"
-  TYPE_OF_JOURNAL_ACT = "Journal"
-  TYPE_OF_WIKI_ACT = "Wiki"
-  TYPE_OF_NEWS_ACT = "News"
-
-  attr_accessible :forge_message_id, :forge_message_type, :project_id, :user_id, :viewed, :secret_key
+  # status在不同的类中，作用不同
+  # Isseu： satus nil：发布了缺陷；：1：缺陷计划完成日志到了提醒
+  attr_accessible :forge_message_id, :forge_message_type, :project_id, :user_id, :viewed, :secret_key, :status
 
   belongs_to :forge_message ,:polymorphic => true
   belongs_to :project
diff --git a/db/migrate/20150928090128_add_status_to_forge_message.rb b/db/migrate/20150928090128_add_status_to_forge_message.rb
new file mode 100644
index 000000000..e08af8802
--- /dev/null
+++ b/db/migrate/20150928090128_add_status_to_forge_message.rb
@@ -0,0 +1,5 @@
+class AddStatusToForgeMessage < ActiveRecord::Migration
+  def change
+    add_column :forge_messages, :status, :integer
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 77a4d4d50..205f3140c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20150925060939) do
+ActiveRecord::Schema.define(:version => 20150928090128) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false
@@ -476,6 +476,13 @@ ActiveRecord::Schema.define(:version => 20150925060939) do
 
   add_index "delayed_jobs", ["priority", "run_at"], :name => "delayed_jobs_priority"
 
+  create_table "discuss_demos", :force => true do |t|
+    t.string   "title"
+    t.text     "body"
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
+  end
+
   create_table "documents", :force => true do |t|
     t.integer  "project_id",                :default => 0,  :null => false
     t.integer  "category_id",               :default => 0,  :null => false
@@ -490,23 +497,26 @@ ActiveRecord::Schema.define(:version => 20150925060939) do
   add_index "documents", ["created_on"], :name => "index_documents_on_created_on"
   add_index "documents", ["project_id"], :name => "documents_project_id"
 
-  create_table "dts", :force => true do |t|
-    t.string   "IPLineCode"
-    t.string   "Description"
-    t.string   "Num"
-    t.string   "Variable"
-    t.string   "TraceInfo"
-    t.string   "Method"
+  create_table "dts", :primary_key => "Num", :force => true do |t|
+    t.string   "Defect",        :limit => 50
+    t.string   "Category",      :limit => 50
     t.string   "File"
-    t.string   "IPLine"
-    t.string   "Review"
-    t.string   "Category"
-    t.string   "Defect"
-    t.string   "PreConditions"
-    t.string   "StartLine"
+    t.string   "Method"
+    t.string   "Module",        :limit => 20
+    t.string   "Variable",      :limit => 50
+    t.integer  "StartLine"
+    t.integer  "IPLine"
+    t.string   "IPLineCode",    :limit => 200
+    t.string   "Judge",         :limit => 15
+    t.integer  "Review",        :limit => 1
+    t.string   "Description"
+    t.text     "PreConditions", :limit => 2147483647
+    t.text     "TraceInfo",     :limit => 2147483647
+    t.text     "Code",          :limit => 2147483647
     t.integer  "project_id"
-    t.datetime "created_at",    :null => false
-    t.datetime "updated_at",    :null => false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.integer  "id",                                  :null => false
   end
 
   create_table "enabled_modules", :force => true do |t|
@@ -566,6 +576,7 @@ ActiveRecord::Schema.define(:version => 20150925060939) do
     t.datetime "created_at",         :null => false
     t.datetime "updated_at",         :null => false
     t.string   "secret_key"
+    t.integer  "status"
   end
 
   create_table "forums", :force => true do |t|
@@ -910,7 +921,6 @@ ActiveRecord::Schema.define(:version => 20150925060939) do
     t.datetime "created_on"
     t.integer  "comments_count",               :default => 0,  :null => false
     t.integer  "course_id"
-    t.datetime "updated_on"
   end
 
   add_index "news", ["author_id"], :name => "index_news_on_author_id"
diff --git a/lib/tasks/issue_due_date.rake b/lib/tasks/issue_due_date.rake
new file mode 100644
index 000000000..0c44b7c4d
--- /dev/null
+++ b/lib/tasks/issue_due_date.rake
@@ -0,0 +1,21 @@
+#coding=utf-8
+namespace :issue_endtime do
+  desc "send a message for Issue'due_date deadline"
+  task :due_date => :environment do
+    contrast_time = Time.now - 86400
+    issues = Issue.where("due_date >=? and due_date <=? and due_date !=?",contrast_time,Time.now, nil)
+    issues.each do |issue|
+      if ForgeMessage.where("forge_message_type =? and forge_message_id =? and status =?", "Issue", issue.id, 1).first.nil?
+        recipients = []
+        assigner = User.find(issue.assigned_to_id)
+        recipients << issue.author
+        recipients << assigner
+        recipients.each do |r|
+          issue.forge_messages << ForgeMessage.new(:user_id => r.id, :project_id => issue.project_id, :viewed => false, :status => true)
+          # 发送邮件通知
+          # Mailer.homework_endtime__added(homework_common, s.student_id).deliver
+        end
+      end
+    end
+  end
+end