From 2a07b7dbb8178db6ee1cc0915c0d12ba1c906d04 Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Thu, 10 Aug 2017 10:34:23 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9B=E6=95=B0=E7=BB=84=E6=9F=A5?=
 =?UTF-8?q?=E8=AF=A2=E6=9D=A1=E4=BB=B6=E4=B8=AD=E7=9A=84null=E6=9F=A5?=
 =?UTF-8?q?=E8=AF=A2?=
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---
 library/think/db/Builder.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/think/db/Builder.php b/library/think/db/Builder.php
index 41700d9f..d5c7e9ab 100644
--- a/library/think/db/Builder.php
+++ b/library/think/db/Builder.php
@@ -302,7 +302,7 @@ abstract class Builder
 
         // 查询规则和条件
         if (!is_array($val)) {
-            $val = ['=', $val];
+            $val = is_null($val) ? ['null', ''] : ['=', $val];
         }
         list($exp, $value) = $val;