From 7f9108c6d22bea37784b3325ad3413ea1608a2d8 Mon Sep 17 00:00:00 2001
From: Raymond Feng <raymond@strongloop.com>
Date: Fri, 15 Aug 2014 23:30:23 -0700
Subject: [PATCH] Check null

See https://github.com/strongloop/loopback-datasource-juggler/issues/223
---
 lib/dao.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/dao.js b/lib/dao.js
index 6595a576..3d76be09 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -1155,6 +1155,7 @@ DataAccessObject.prototype.updateAttributes = function updateAttributes(data, cb
             inst[key] = data[key];
             typedData[key] = inst[key];
             if (typeof typedData[key] === 'object' 
+              && typedData[key] !== null
               && typeof typedData[key].toObject === 'function') {
               typedData[key] = typedData[key].toObject();
             }