diff --git a/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Main.cs b/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Main.cs
index dd84845b9..b542c8f33 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Main.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Main.cs
@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UNavDynamic111N.Init();
             UCustom019.Init();
             UCustom015.Init();
             UCustom014.Init();
diff --git a/Src/Asp.NetCore2/SqlSeverTest/UnitTest/UNavDynamic111N.cs b/Src/Asp.NetCore2/SqlSeverTest/UnitTest/UNavDynamic111N.cs
new file mode 100644
index 000000000..9e12df543
--- /dev/null
+++ b/Src/Asp.NetCore2/SqlSeverTest/UnitTest/UNavDynamic111N.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+namespace OrmTest
+{
+    public class UNavDynamic111N
+    {
+
+        public static void Init() 
+        {
+
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables<UnitaSchoolA, UnitaStudentA,UnitaBookA>();
+            db.DbMaintenance.TruncateTable<UnitaSchoolA, UnitaStudentA, UnitaBookA>();
+            db.Insertable(new UnitaSchoolA() { SchoolId = 1, CityId = 1001001, School_Name = "北大" }).ExecuteCommand();
+            db.Insertable(new UnitaSchoolA() { SchoolId = 2, CityId = 2, School_Name = "清华" }).ExecuteCommand();
+            db.Insertable(new UnitaSchoolA() { SchoolId = 3, CityId = 3, School_Name = "青鸟" }).ExecuteCommand();
+
+            db.Insertable(new UnitaStudentA() { StudentId = 1, SchoolId = 1, Name = "北大jack" }).ExecuteCommand();
+            db.Insertable(new UnitaStudentA() { StudentId = 2, SchoolId = 1, Name = "北大tom" }).ExecuteCommand();
+            db.Insertable(new UnitaStudentA() { StudentId = 3, SchoolId = 2, Name = "清华jack" }).ExecuteCommand();
+            db.Insertable(new UnitaStudentA() { StudentId = 4, SchoolId = 2, Name = "清华tom" }).ExecuteCommand();
+            db.Insertable(new UnitaStudentA() { StudentId = 5, SchoolId = null, Name = "清华tom" }).ExecuteCommand();
+            db.Insertable(new UnitaStudentA() { StudentId = 6, SchoolId = 3, Name = "青鸟学生" }).ExecuteCommand();
+
+            db.Insertable(new UnitaBookA() { BookId = 1, Names = "java", studenId = 1 }).ExecuteCommand();
+            db.Insertable(new UnitaBookA() { BookId = 2, Names = "c#2", studenId = 2 }).ExecuteCommand();
+            db.Insertable(new UnitaBookA() { BookId = 3, Names = "c#1", studenId = 2 }).ExecuteCommand();
+            db.Insertable(new UnitaBookA() { BookId = 4, Names = "php", studenId = 3 }).ExecuteCommand();
+            db.Insertable(new UnitaBookA() { BookId = 5, Names = "js", studenId = 4 }).ExecuteCommand();
+            db.Insertable(new UnitaBookA() { BookId = 6, Names = "北大jack", studenId = 1 }).ExecuteCommand();
+
+            var list =db.Queryable<UnitaStudentA>()
+                .Includes(x => x.SchoolA).Where(x=>x.SchoolA.School_Name!=null).ToList();
+
+            var list2 = db.Queryable<UnitaStudentA>()
+                .Includes(x => x.Books).Where(x=>x.Books.Any()).ToList();
+        }
+        public class UnitaStudentA
+        {
+            public int StudentId { get; set; }
+            public string Name { get; set; }
+            [SugarColumn(IsNullable = true)]
+            public int? SchoolId { get; set; }
+            [Navigate(NavigateType.OneToOne, nameof(SchoolId),nameof(UnitaSchoolA.SchoolId))]
+            public UnitaSchoolA SchoolA { get; set; }
+            [Navigate(NavigateT