From 312955e5dc80027e05aeb20aef7094fa38f4f94e Mon Sep 17 00:00:00 2001
From: cxt <pinecxt@163.com>
Date: Fri, 11 Sep 2015 16:45:50 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=81=E7=A7=BB=E6=96=87=E4=BB=B6?=
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---
 .../20150911064528_alter_user_activities.rb   | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 db/migrate/20150911064528_alter_user_activities.rb

diff --git a/db/migrate/20150911064528_alter_user_activities.rb b/db/migrate/20150911064528_alter_user_activities.rb
new file mode 100644
index 000000000..a65f933d8
--- /dev/null
+++ b/db/migrate/20150911064528_alter_user_activities.rb
@@ -0,0 +1,26 @@
+class AlterUserActivities < ActiveRecord::Migration
+  def up
+    count = UserActivity.all.count / 30 + 3
+    transaction do
+      for i in 1 ... count do i
+        UserActivity.page(i).per(30).each do |activity|
+          if activity.act_type == 'Message'
+            if activity.act
+              unless activity.act.parent_id.nil?
+                parent_act = UserActivity.where("act_id = #{activity.act.parent.id} and act_type='Message'").first
+                parent_act.created_at = activity.act.parent.children.maximum("created_on")
+                parent_act.save
+                activity.destroy
+              end
+            else
+              activity.destroy
+            end
+          end
+        end
+      end
+    end
+  end
+
+  def down
+  end
+end