From 06cc18526a1f63b8bb16809e23f2eb17ade7a85e Mon Sep 17 00:00:00 2001
From: Loz Calver <kinglozzer@gmail.com>
Date: Wed, 9 Sep 2015 09:24:56 +0100
Subject: [PATCH] FIX: UploadField error when attempting to attach non-existent
 file IDs

---
 javascript/UploadField.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/javascript/UploadField.js b/javascript/UploadField.js
index 698f36249..ab2c7a7dd 100644
--- a/javascript/UploadField.js
+++ b/javascript/UploadField.js
@@ -316,6 +316,8 @@
 						indicator.remove();
 					},
 					success: function(data, status, xhr) {
+						if (!data || $.isEmptyObject(data)) return;
+
 						self.fileupload('attach', {
 							files: data,
 							options: self.fileupload('option'),