diff --git a/app/models/message.rb b/app/models/message.rb
index dafdb767f..f0e2ff2d3 100644
--- a/app/models/message.rb
+++ b/app/models/message.rb
@@ -40,6 +40,7 @@ class Message < ActiveRecord::Base
   # 课程/项目 消息
   has_many :course_messages, :class_name =>'CourseMessage', :as => :course_message, :dependent => :destroy
   has_many :forge_messages, :class_name => 'ForgeMessage', :as => :forge_message, :dependent => :destroy
+  has_many :org_activities, :class_name => 'OrgActivity', :dependent => :destroy
   has_many :at_messages, as: :at_message, dependent: :destroy
 
   has_many :ActivityNotifies,:as => :activity, :dependent => :destroy
diff --git a/db/migrate/20151230015225_add_quotes_to_messages.rb b/db/migrate/20151230015225_add_quotes_to_messages.rb
deleted file mode 100644
index 4e19725d5..000000000
--- a/db/migrate/20151230015225_add_quotes_to_messages.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-class AddQuotesToMessages < ActiveRecord::Migration
-  def change
-  end
-end