From 901d1e75dbdbf3cd21dc3f0e95cee0880939ba2f Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Mon, 24 Oct 2022 13:05:09 +0800
Subject: [PATCH] Update  db.UpdateNav

---
 .../Abstract/ExecuteNavProvider/UpdateNavManyToMany.cs        | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavManyToMany.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavManyToMany.cs
index 49da10015..591255824 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavManyToMany.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavManyToMany.cs
@@ -39,6 +39,10 @@ namespace SqlSugar
             foreach (var item in parentList)
             {
                 var items = parentNavigateProperty.PropertyInfo.GetValue(item);
+                if (items == null) 
+                {
+                    continue;
+                }
                 var children = ((List<TChild>)items);
                 if (this._Options != null && this._Options.ManyToManyIsUpdateB)
                 {