添加迁移：项目讨论区数据重复问题

app/models/message.rb

@@ -199,8 +199,7 @@ class Message < ActiveRecord::Base
   def act_as_forge_activity
     # 如果project为空，那么就是课程相关的消息
     if self.board.project_id != -1 && self.parent_id.nil?
-      self.forge_acts << ForgeActivity.new(:user_id => self.author_id,
-                                             :project_id => self.board.project.id)
+      self.forge_acts << ForgeActivity.new(:user_id => self.author_id, :project_id => self.board.project.id)
     end
   end
 

app/views/users/_project_message.html.erb

@@ -86,9 +86,7 @@
   <div class="homepagePostReply">
     <div class="topBorder" style="display: <%= count>0 ? 'none': '' %>"></div>
     <div class="homepagePostReplyBanner" style="display: <%= count>0 ? '': 'none' %>">
-      <div class="homepagePostReplyBannerCount" onclick="expand_reply_input('#reply_input_<%= user_activity_id %>');">回复(
-        <%=count %>
-        )</div>
+      <div class="homepagePostReplyBannerCount" onclick="expand_reply_input('#reply_input_<%= user_activity_id %>');">回复(<%=count %>)</div>
       <div class="homepagePostReplyBannerTime"><%#=format_date(activity.updated_on)%></div>
       <%if count>3 %>
           <div class="homepagePostReplyBannerMore"><a id="reply_btn_<%=user_activity_id%>" onclick="expand_reply('#reply_div_<%= user_activity_id %> li','#reply_btn_<%=user_activity_id%>')" data-count="<%= count %>" data-init="0" class=" replyGrey" href="javascript:void(0)" value="show_help" >展开更多</a></div>

db/migrate/20160105073350_drop_message_for_forge_activities.rb

@@ -0,0 +1,14 @@
+class DropMessageForForgeActivities < ActiveRecord::Migration
+  def up
+    forge_activities = ForgeActivity.where("forge_act_type =?", "Message")
+    forge_activities.each do |fa|
+      # 删除项目动态中，讨论区也会多一条记录问题
+      if fa.forge_act && !fa.forge_act.parent_id.nil?
+        fa.delete
+      end
+    end
+  end
+
+  def down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20151231023610) do
+ActiveRecord::Schema.define(:version => 20160105073350) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false