diff --git a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
index 714869e54..d470c81eb 100644
--- a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
+++ b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
@@ -139,6 +139,7 @@
     <Compile Include="UnitTest\UDelete.cs" />
     <Compile Include="UnitTest\UFastest.cs" />
     <Compile Include="UnitTest\UConfig.cs" />
+    <Compile Include="UnitTest\UOneManyMany 2.cs" />
     <Compile Include="UnitTest\UOneManyMany.cs" />
     <Compile Include="UnitTest\USplit.cs" />
     <Compile Include="UnitTest\Models\TB_AdminUser.cs" />
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany 2.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany 2.cs
index 1edecc81f..e5611fa26 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany 2.cs	
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany 2.cs	
@@ -107,6 +107,15 @@ namespace OrmTest
             {
                 throw new Exception("unit error");
             }
+
+            db.DbMaintenance.TruncateTable<Student_002, School_002, Room_002, Desk_002>();
+
+            db.InsertNav(list.First().school_001)
+             .ThenInclude(x => x.rooms)
+             .ThenInclude(x => x.desk);
+            db.InsertNav(list.Last().school_001)
+              .ThenInclude(x => x.rooms)
+              .ThenInclude(x => x.desk);
         }
 
         public class Student_002