From fcfeacdc95a8a872c9f9135b1b52592f60120917 Mon Sep 17 00:00:00 2001
From: 2881099 <2881099@qq.com>
Date: Tue, 12 Jan 2021 12:40:07 +0800
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---
 FreeSql.Tests/FreeSql.Tests/UnitTest5.cs      | 35 +++++++++++++++++++
 FreeSql/Internal/CommonExpression.cs          | 11 ++++--
 .../Internal/Model/ReadAnonymousTypeInfo.cs   |  2 ++
 3 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 FreeSql.Tests/FreeSql.Tests/UnitTest5.cs

diff --git a/FreeSql.Tests/FreeSql.Tests/UnitTest5.cs b/FreeSql.Tests/FreeSql.Tests/UnitTest5.cs
new file mode 100644
index 00000000..c2436f29
--- /dev/null
+++ b/FreeSql.Tests/FreeSql.Tests/UnitTest5.cs
@@ -0,0 +1,35 @@
+using AME.Helpers;
+using FreeSql.DataAnnotations;
+using FreeSql.Internal;
+using FreeSql.Internal.CommonProvider;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Text;
+using System.Threading;
+using Xunit;
+using static FreeSql.Tests.UnitTest1;
+
+namespace FreeSql.Tests
+{
+    public class UnitTest5
+    {
+        [Fact]
+        public void TestUpdateDyWhere()
+        {
+            var fsql = g.sqlite;
+
+            var sql = fsql.Update<ts_up_dywhere01>(new { status = "xxx" })
+                .Set(a => a.status, "yyy")
+                .ToSql();
+
+            Assert.Equal(@"UPDATE ""ts_up_dywhere01"" SET ""status"" = @p_0 
+WHERE (""status"" = 'xxx')", sql);
+        }
+        class ts_up_dywhere01
+        {
+            public Guid id { get; set; }
+            public string status { get; set; }
+        }
+    }
+}
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 1ee15fca..48dec526 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -280,6 +280,7 @@ namespace FreeSql.Internal
                                 CsType = initAssignExp.Expression.Type,
                                 MapType = initAssignExp.Expression.Type
                             };
+                            if (child.Property == null) child.ReflectionField = initExp.Type.GetField(initExp.Bindings[a].Member.Name, BindingFlags.Public | BindingFlags.Instance);
                             parent.Childs.Add(child);
                             ReadAnonymousField(_tables, field, child, ref index, initAssignExp.Expression, select, diymemexp, whereGlobalFilter, findIncludeMany, false);
                         }
@@ -399,13 +400,17 @@ namespace FreeSql.Internal
             var isnull = notRead;
             for (var b = ctorParmsLength; b < parent.Childs.Count; b++)
             {
-                var prop = parent.Childs[b].Property;
                 var dbval = parent.IsEntity ? new ReadAnonymousDbValueRef() : null;
                 var objval = ReadAnonymous(parent.Childs[b], dr, ref index, notRead, dbval, rowIndex, fillIncludeMany);
                 if (isnull == false && parent.IsEntity && dbval.DbValue == null && parent.Table != null && parent.Table.ColumnsByCs.TryGetValue(parent.Childs[b].CsName, out var trycol) && trycol.Attribute.IsPrimary)
                     isnull = true;
-                if (isnull == false && prop.CanWrite)
-                    prop.SetValue(ret, objval, null);
+
+                if (isnull == false)
+                {
+                    var prop = parent.Childs[b].Property;
+                    if (prop?.CanWrite == true) prop.SetValue(ret, objval, null);
+                    else if (prop == null) parent.Childs[b].ReflectionField?.SetValue(ret, objval);
+                }
             }
             return isnull ? null : ret;
         }
diff --git a/FreeSql/Internal/Model/ReadAnonymousTypeInfo.cs b/FreeSql/Internal/Model/ReadAnonymousTypeInfo.cs
index d2790276..1416caa9 100644
--- a/FreeSql/Internal/Model/ReadAnonymousTypeInfo.cs
+++ b/FreeSql/Internal/Model/ReadAnonymousTypeInfo.cs
@@ -9,6 +9,7 @@ namespace FreeSql.Internal.Model
     public class ReadAnonymousTypeInfo
     {
         public PropertyInfo Property { get; set; }
+        public FieldInfo ReflectionField { get; set; }
         public string CsName { get; set; }
         public Type CsType { get; set; }
         public Type MapType { get; set; }
@@ -23,6 +24,7 @@ namespace FreeSql.Internal.Model
         public void CopyTo(ReadAnonymousTypeInfo target)
         {
             target.Property = Property;
+            target.ReflectionField = ReflectionField;
             target.CsName = CsName;
             target.CsType = CsType;
             target.MapType = MapType;