From 32f1a327a645c860f1734a06bb73f63dd69db5b2 Mon Sep 17 00:00:00 2001
From: James Allen <james@sharelatex.com>
Date: Tue, 3 Jun 2014 11:42:41 +0100
Subject: [PATCH] Add in null check

---
 services/docstore/app/coffee/DocManager.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/services/docstore/app/coffee/DocManager.coffee b/services/docstore/app/coffee/DocManager.coffee
index 74591cebfa..3de6f906ae 100644
--- a/services/docstore/app/coffee/DocManager.coffee
+++ b/services/docstore/app/coffee/DocManager.coffee
@@ -63,7 +63,7 @@ module.exports = DocManager =
 
 	_findDocInFolder: (folder = {}, doc_id, currentPath) ->
 		for doc, i in folder.docs or []
-			if doc._id.toString() == doc_id.toString()
+			if doc._id? and doc._id.toString() == doc_id.toString()
 				return {
 					doc: doc
 					mongoPath: "#{currentPath}.docs.#{i}"