From badf53f8866eca1c706c463193927f2b74e42e66 Mon Sep 17 00:00:00 2001
From: albert <r888888888@gmail.com>
Date: Wed, 13 Mar 2013 16:14:22 -0400
Subject: [PATCH] fix for #854

---
 app/helpers/pool_versions_helper.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/helpers/pool_versions_helper.rb b/app/helpers/pool_versions_helper.rb
index ab4328a75..ce1971952 100644
--- a/app/helpers/pool_versions_helper.rb
+++ b/app/helpers/pool_versions_helper.rb
@@ -1,6 +1,6 @@
 module PoolVersionsHelper
   def pool_version_diff(current)
-    prev = PoolVersion.where(["pool_id = ? and id < ?", current.pool_id, current.id]).order("updated_at desc").first
+    prev = PoolVersion.where(["pool_id = ? and updated_at < ?", current.pool_id, current.updated_at]).order("updated_at desc").first
 
     if prev.nil?
       return current.post_id_array.map {|x| '<ins><a href="/posts/' + x.to_s + '">' + x.to_s + '</a></ins>'}.join(" ").html_safe