From cc573e4dbaaa7af0522c1e96c522d208bf432c72 Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Wed, 7 Dec 2016 07:27:04 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9BModel=E7=B1=BBsave=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=E5=86=99=E5=85=A5=E5=AF=B9=E4=B8=BB=E9=94=AE=E5=80=BC?=
 =?UTF-8?q?=E7=9A=84=E5=88=A4=E6=96=AD?=
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---
 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 404e63de..93953f2c 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -728,7 +728,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
             $result = $this->db()->insert($this->data);
 
             // 获取自动增长主键
-            if ($result && is_string($pk) && !isset($this->data[$pk])) {
+            if ($result && is_string($pk) && (!isset($this->data[$pk]) || '' == $this->data[$pk])) {
                 $insertId = $this->db()->getLastInsID($sequence);
                 if ($insertId) {
                     $this->data[$pk] = $insertId;