From 08c3be7c4c31d779dfbeaae351715cfaa3190dff Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Wed, 14 Dec 2016 15:08:07 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9B=E8=BF=BD=E5=8A=A0=E5=85=B3?=
 =?UTF-8?q?=E8=81=94=E6=A8=A1=E5=9E=8B=E5=B1=9E=E6=80=A7=E7=9A=84=E5=88=A4?=
 =?UTF-8?q?=E6=96=AD?=
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---
 library/think/Model.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/library/think/Model.php b/library/think/Model.php
index 7e00d60a..1d34a366 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -516,7 +516,11 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         if ($model instanceof Model) {
             foreach ($append as $key => $attr) {
                 $key = is_numeric($key) ? $attr : $key;
-                $this->setAttr($key, $model->$attr);
+                if ($this->__isset($key)) {
+                    throw new Exception('bind attr has exists:' . $key);
+                } else {
+                    $this->setAttr($key, $model->$attr);
+                }
             }
         }
         return $this;