From 49a1eecb45bf28b9c487539bacbd3d00395a4b10 Mon Sep 17 00:00:00 2001
From: 28810 <28810@YEXIANGQIN>
Date: Thu, 1 Aug 2019 10:05:08 +0800
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---
 FreeSql/Internal/UtilsExpressionTree.cs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/FreeSql/Internal/UtilsExpressionTree.cs b/FreeSql/Internal/UtilsExpressionTree.cs
index a9d8715f..5a74b980 100644
--- a/FreeSql/Internal/UtilsExpressionTree.cs
+++ b/FreeSql/Internal/UtilsExpressionTree.cs
@@ -155,8 +155,7 @@ namespace FreeSql.Internal
                     trytb.ColumnsByCsIgnore.Add(p.Name, col);
                     continue;
                 }
-                if (entityDefault == null) entityDefault = Activator.CreateInstance(entity);
-                colattr.DbDefautValue = trytb.Properties[p.Name].GetValue(entityDefault);
+                if (entityDefault != null) colattr.DbDefautValue = trytb.Properties[p.Name].GetValue(entityDefault);
                 if (colattr.DbDefautValue != null && p.PropertyType != colattr.MapType) colattr.DbDefautValue = Utils.GetDataReaderValue(colattr.MapType, colattr.DbDefautValue);
                 if (colattr.DbDefautValue == null) colattr.DbDefautValue = tp?.defaultValue;
                 if (colattr.IsNullable == false && colattr.DbDefautValue == null)