From 0deae80f183b0786eff3d2542d3f67bfc415f0ef Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Tue, 25 Oct 2022 09:57:12 +0800
Subject: [PATCH] Synchronization code

---
 .../ExecuteNavProvider/InsertNavProviderManyToMany.cs    | 9 ++++++++-
 Src/Asp.NetCore2/SqlSugar/Entities/DeleteNavOptions.cs   | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs
index 5ba51ffe3..308b8a892 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs
@@ -76,7 +76,14 @@ namespace SqlSugar
                 }
             }
             var ids = mappgingTables.Select(x => x[mappingA.DbColumnName]).ToList();
-            this._Context.Deleteable<object>().AS(mappingEntity.DbTableName).In(mappingA.DbColumnName, ids).ExecuteCommand();
+            if (_navOptions != null && _navOptions.ManyToManyNoDeleteMap)
+            {
+                //The reserved
+            }
+            else
+            {
+                this._Context.Deleteable<object>().AS(mappingEntity.DbTableName).In(mappingA.DbColumnName, ids).ExecuteCommand();
+            }
             this._Context.Insertable(mappgingTables).AS(mappingEntity.DbTableName).ExecuteCommand();
             SetNewParent<TChild>(thisEntity, thisPkColumn);
         }
diff --git a/Src/Asp.NetCore2/SqlSugar/Entities/DeleteNavOptions.cs b/Src/Asp.NetCore2/SqlSugar/Entities/DeleteNavOptions.cs
index 2669fbe5d..826091f62 100644
--- a/Src/Asp.NetCore2/SqlSugar/Entities/DeleteNavOptions.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Entities/DeleteNavOptions.cs
@@ -42,5 +42,6 @@ namespace SqlSugar
     public class InsertNavOptions 
     {
         public bool OneToManyIfExistsNoInsert { get; set; }
+        public bool ManyToManyNoDeleteMap { get; set; }
     }
 }