From 4afee9c8b82e14c93e8ef4e1f217fef5514914f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=82=A0=E6=82=A0=E5=B1=B1=E9=9B=A8?= <wf9100@qq.com>
Date: Fri, 6 Jan 2017 15:10:59 +0800
Subject: [PATCH] Update BelongsToMany.php
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给$data默认值NULL,用于删除以关联外键为条件的中间表
---
 library/think/model/relation/BelongsToMany.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/think/model/relation/BelongsToMany.php b/library/think/model/relation/BelongsToMany.php
index bbab3714..428620a2 100644
--- a/library/think/model/relation/BelongsToMany.php
+++ b/library/think/model/relation/BelongsToMany.php
@@ -308,7 +308,7 @@ class BelongsToMany extends Relation
      * @param bool              $relationDel 是否同时删除关联表数据
      * @return integer
      */
-    public function detach($data, $relationDel = false)
+    public function detach($data = null, $relationDel = false)
     {
         if (is_array($data)) {
             $id = $data;