From fc828df683bf609b0196f166c6fdbe91d5e2d310 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=90=91=E6=9E=97?= <as2252258@163.com>
Date: Wed, 21 Sep 2022 14:40:24 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8F=98=E6=9B=B4?=
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---
 Base/Model.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Base/Model.php b/Base/Model.php
index 09364bd..ef8d0cf 100644
--- a/Base/Model.php
+++ b/Base/Model.php
@@ -661,9 +661,12 @@ abstract class Model extends Component implements ModelInterface, ArrayAccess, T
 	{
 		$assoc = array_diff_assoc($this->_attributes, $this->_oldAttributes);
 
+		$column = $this->getColumns();
+
 		$uassoc = array_intersect_assoc($this->_attributes, $this->_oldAttributes);
 		foreach ($assoc as $key => $item) {
-			if ($item === null) {
+			$encode = $column->get_fields($key);
+			if ($column->isString($encode) && $item === null) {
 				unset($assoc[$key]);
 			}
 		}