From 4ef38817ffdf5b623332cdcf7a0ef239e882ec5a Mon Sep 17 00:00:00 2001
From: 2881099 <2881099@qq.com>
Date: Thu, 12 Nov 2020 05:11:05 +0800
Subject: [PATCH] =?UTF-8?q?-=20=E4=BF=AE=E5=A4=8D=20=E5=AE=9E=E4=BD=93?=
 =?UTF-8?q?=E7=B1=BB=E6=8B=A5=E6=9C=89=E6=9E=84=E9=80=A0=E5=8F=82=E6=95=B0?=
 =?UTF-8?q?=E6=97=B6=EF=BC=8CToList\<DTO\>=20=E6=98=A0=E5=B0=84=E6=9F=A5?=
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---
 FreeSql.Tests/FreeSql.Tests/UnitTest4.cs | 3 +++
 FreeSql/Internal/CommonExpression.cs     | 6 +++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs b/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs
index 672b4cdf..09bce801 100644
--- a/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs
+++ b/FreeSql.Tests/FreeSql.Tests/UnitTest4.cs
@@ -15,6 +15,7 @@ namespace FreeSql.Tests
         {
             public ts_record parent { get; set; }
         }
+        public record ts_record_dto(DateTime Date, int TemperatureC, string Summary);
 
         [Fact]
         public void LeftJoinNull01()
@@ -24,6 +25,8 @@ namespace FreeSql.Tests
             fsql.Delete<ts_record>().Where("1=1").ExecuteAffrows();
             fsql.Insert(new ts_record(DateTime.Now, 1, 2, "123")).ExecuteAffrows();
             var fores = fsql.Select<ts_record>().ToList();
+            var fores_dtos1 = fsql.Select<ts_record>().ToList<ts_record_dto>();
+            var fores_dtos2 = fsql.Select<ts_record>().ToList(a => new ts_record_dto(a.Date, a.TemperatureC, a.Summary));
 
 
 
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 0952cf1f..b173c125 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -273,9 +273,9 @@ namespace FreeSql.Internal
                             {
                                 if (a.NodeType != ExpressionType.Constant) return true;
                                 var constVal = (a as ConstantExpression)?.Value;
-                                if (constVal == null) return true;
-                                if (object.Equals(constVal, a.Type.CreateInstanceGetDefaultValue()) == false) return true;
-                                return false;
+                                if (constVal == null) return false; //- 修复 实体类拥有构造参数时，ToList\<DTO\> 映射查询无效的 bug；
+                                if (object.Equals(constVal, a.Type.CreateInstanceGetDefaultValue())) return false;
+                                return true;
                             })
                         ))
                     {