diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UNavDynamic111N.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UNavDynamic111N.cs
index 275afa396..77075c4a8 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/UNavDynamic111N.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UNavDynamic111N.cs
@@ -27,7 +27,7 @@ namespace OrmTest
             db.Insertable(new UnitaStudentA() { StudentId = 6, SchoolId = 3, Name = "青鸟学生" }).ExecuteCommand();
 
             var list=db.Queryable<UnitaStudentA>()
-                .Includes(x => x.SchoolA).ToList();
+                .Includes(x => x.SchoolA).Where(x=>x.SchoolA.School_Name=="a").ToList();
         }
         public class UnitaStudentA
         {
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/OneToOneNavgateExpression.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/OneToOneNavgateExpression.cs
index cae398077..10b2411b5 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/OneToOneNavgateExpression.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/OneToOneNavgateExpression.cs
@@ -77,7 +77,18 @@ namespace SqlSugar
                     " NavigateType.Dynamic no support expression .  "+ this.ProPertyEntity.Type.Name,
                     " NavigateType.Dynamic 自定义导航对象不支持在Where(x=>x.自定义.Id==1)等方法中使用"+ this.ProPertyEntity.Type.Name);
             }
-            var pk = this.ProPertyEntity.Columns.First(it => it.IsPrimarykey == true).DbColumnName;
+            var pk = this.ProPertyEntity.Columns.FirstOrDefault(it => it.IsPrimarykey == true)?.DbColumnName;
+            if (pk == null && Navigat.Name2 != null)
+            {
+                pk = this.ProPertyEntity.Columns.FirstOrDefault(it => it.PropertyName == Navigat.Name2)?.DbColumnName;
+            }
+            if(pk==null) 
+            {
+                Check.ExceptionEasy(
+                  true,
+                  $"{this.ProPertyEntity.EntityName} naviate config error",
+                  $"{this.ProPertyEntity.EntityName} 导航配置错误");
+            }
             var name = this.EntityInfo.Columns.First(it => it.PropertyName == Navigat.Name).DbColumnName;
             var selectName = this.ProPertyEntity.Columns.First(it => it.PropertyName ==MemberName).DbColumnName;
             MapperSql mapper = new MapperSql();