From 7445dce2e8c645c2b6f46c0fdf4b7a573de5ac7f Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Thu, 6 Jul 2017 18:01:15 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 library/think/Model.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/think/Model.php b/library/think/Model.php
index 7420d563..94b61bac 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -1132,7 +1132,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     public function getChangedData()
     {
         $data = array_udiff_assoc($this->data, $this->origin, function ($a, $b) {
-            if ((empty($b) || empty($b)) && $a !== $b) {
+            if ((empty($a) || empty($b)) && $a !== $b) {
                 return 1;
             }
             return is_object($a) || $a != $b ? 1 : 0;