From 1eabf2e92b5b8ce4d1f8c5b7357366f1026e8d85 Mon Sep 17 00:00:00 2001
From: Nick Neufeld <nneufeld@infotech.com>
Date: Tue, 23 Sep 2014 09:18:25 -0400
Subject: [PATCH] Fix PATCH support in sync function, only changed attributes
 should be sent to the server rather than the entire model.

---
 vendor/assets/javascripts/backbone_rails_sync.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/vendor/assets/javascripts/backbone_rails_sync.js b/vendor/assets/javascripts/backbone_rails_sync.js
index 359cb49..b40cd45 100644
--- a/vendor/assets/javascripts/backbone_rails_sync.js
+++ b/vendor/assets/javascripts/backbone_rails_sync.js
@@ -16,12 +16,13 @@
     // Serialize data, optionally using paramRoot
     if (options.data == null && model && (method === 'create' || method === 'update' || method === 'patch')) {
       options.contentType = 'application/json';
-      data = JSON.stringify(options.attrs || model.toJSON(options));
+      var attributes = options.attrs || model.toJSON(options);
+      var data;
       if (model.paramRoot) {
         data = {};
-        data[model.paramRoot] = model.toJSON(options);
+        data[model.paramRoot] = attributes;
       } else {
-        data = model.toJSON();
+        data = attributes;
       }
       options.data = JSON.stringify(data);
     }