From f321d90dc7cf0b2049fd54dbbba8f390db4bb329 Mon Sep 17 00:00:00 2001
From: "Kyle B. Johnson" <kbjohnson90@gmail.com>
Date: Wed, 23 Jul 2014 10:42:42 -0400
Subject: [PATCH] Add isset conditional for serialize observer

Without a conditional to serialize, then on update a column is created (empty), serialized, and overrides previously stored data.
---
 core/MY_Model.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/MY_Model.php b/core/MY_Model.php
index 05add98..79beee7 100644
--- a/core/MY_Model.php
+++ b/core/MY_Model.php
@@ -694,7 +694,7 @@ public function serialize($row)
     {
         foreach ($this->callback_parameters as $column)
         {
-            $row[$column] = serialize($row[$column]);
+            if (isset($row[$column])) $row[$column] = serialize($row[$column]);
         }
 
         return $row;