From 12a6cd7d8bf8559d91711c627db4365be8724334 Mon Sep 17 00:00:00 2001
From: Zaid Abdulla <zaid@genieacs.com>
Date: Tue, 16 Aug 2016 13:12:27 -0700
Subject: [PATCH] Clear any overlap when using Mongo's $unset operator

---
 lib/db.coffee | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/db.coffee b/lib/db.coffee
index a1841a7..f213484 100644
--- a/lib/db.coffee
+++ b/lib/db.coffee
@@ -538,6 +538,9 @@ saveDevice = (deviceId, deviceData, isNew, callback) ->
 
   return callback() if Object.keys(update).length == 0
 
+  if (update['$unset']?)
+    optimizeProjection(update['$unset'])
+
   devicesCollection.update({'_id' : deviceId}, update, {upsert: isNew}, (err, result) ->
     if not err and result.result.n != 1
       return callback(new Error("Device #{deviceId} not found in database"))