diff --git a/Examples/restful/Startup.cs b/Examples/restful/Startup.cs
index ac6c5817..3cc16581 100644
--- a/Examples/restful/Startup.cs
+++ b/Examples/restful/Startup.cs
@@ -17,6 +17,18 @@ namespace restful {
 				.UseLogger(loggerFactory.CreateLogger<IFreeSql>())
 				.UseAutoSyncStructure(true)
 				.Build();
+
+			Fsql.Aop.CurdAfter = (s, e) => {
+				if (e.ElapsedMilliseconds > 200) {
+					//记录日志
+					//发送短信给负责人
+				}
+			};
+
+			//Fsql.Aop.Where = (s, e) => {
+			//	if (e.Parameters[0]?.ToString() == "1")
+			//		e.IsCancel = true;
+			//};
 		}
 
 		public IConfiguration Configuration { get; }
diff --git a/FreeSql.Tests/UnitTest1.cs b/FreeSql.Tests/UnitTest1.cs
index 2217f07a..016444be 100644
--- a/FreeSql.Tests/UnitTest1.cs
+++ b/FreeSql.Tests/UnitTest1.cs
@@ -126,7 +126,7 @@ namespace FreeSql.Tests {
 		[Fact]
 		public void Test1() {
 
-			g.sqlite.CodeFirst.SyncStructure<TestEnumable>();
+			Assert.Throws<Exception>(() => g.sqlite.CodeFirst.SyncStructure<TestEnumable>());
 
 			var TestEnumable = new TestEnumable();
 			
diff --git a/FreeSql/FreeSql.csproj b/FreeSql/FreeSql.csproj
index 66288a1a..bbc28275 100644
--- a/FreeSql/FreeSql.csproj
+++ b/FreeSql/FreeSql.csproj
@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<TargetFramework>netstandard2.0</TargetFramework>
-		<Version>0.5.22</Version>
+		<Version>0.5.23</Version>
 		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 		<Authors>YeXiangQin</Authors>
 		<Description>FreeSql is the most convenient ORM in dotnet. It supports Mysql, Postgresql, SqlServer, Oracle and Sqlite.</Description>
@@ -18,7 +18,7 @@
 	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-	  <DocumentationFile>C:\Users\28810\Desktop\github\FreeSql\FreeSql\FreeSql.xml</DocumentationFile>
+	  <DocumentationFile>FreeSql.xml</DocumentationFile>
 	  <WarningLevel>3</WarningLevel>
 	</PropertyGroup>
 
diff --git a/FreeSql/Internal/UtilsExpressionTree.cs b/FreeSql/Internal/UtilsExpressionTree.cs
index 6fa879d1..6b71f42b 100644
--- a/FreeSql/Internal/UtilsExpressionTree.cs
+++ b/FreeSql/Internal/UtilsExpressionTree.cs
@@ -109,11 +109,6 @@ namespace FreeSql.Internal {
 					if (tmpLt.Contains("BYTE")) tmpLt = tmpLt.Replace("BYTE", " BYTE");
 					return tmpLt;
 				});
-				colattr.DbDefautValue = trytb.Properties[p.Name].GetValue(Activator.CreateInstance(trytb.Type));
-				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)
-					colattr.DbDefautValue = Activator.CreateInstance(colattr.MapType.IsNullableType() ? colattr.MapType.GenericTypeArguments.FirstOrDefault() : colattr.MapType);
 				if (colattr.IsIdentity == true && colattr.MapType.IsNumberType() == false)
 					colattr.IsIdentity = false;
 				if (setMethod == null) colattr.IsIgnore = true;
@@ -128,6 +123,17 @@ namespace FreeSql.Internal {
 					trytb.ColumnsByCsIgnore.Add(p.Name, col);
 					continue;
 				}
+				colattr.DbDefautValue = trytb.Properties[p.Name].GetValue(Activator.CreateInstance(trytb.Type));
+				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) {
+					var citype = colattr.MapType.IsNullableType() ? colattr.MapType.GenericTypeArguments.FirstOrDefault() : colattr.MapType;
+					if (citype.IsArray)
+						colattr.DbDefautValue = Array.CreateInstance(citype, 0);
+					else
+						colattr.DbDefautValue = Activator.CreateInstance(citype);
+				}
+
 				trytb.Columns.Add(colattr.Name, col);
 				trytb.ColumnsByCs.Add(p.Name, col);
 			}
diff --git a/FreeSql/MySql/MySqlExpression.cs b/FreeSql/MySql/MySqlExpression.cs
index a8664080..f6634806 100644
--- a/FreeSql/MySql/MySqlExpression.cs
+++ b/FreeSql/MySql/MySqlExpression.cs
@@ -18,8 +18,8 @@ namespace FreeSql.MySql {
 				case ExpressionType.Convert:
 					var operandExp = (exp as UnaryExpression)?.Operand;
 					var gentype = exp.Type.NullableTypeOrThis();
-					if (gentype != exp.Type.NullableTypeOrThis()) {
-						switch (exp.Type.NullableTypeOrThis().ToString()) {
+					if (gentype != operandExp.Type.NullableTypeOrThis()) {
+						switch (gentype.ToString()) {
 							case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))";
 							case "System.Byte": return $"cast({getExp(operandExp)} as unsigned)";
 							case "System.Char": return $"substr(cast({getExp(operandExp)} as char), 1, 1)";
diff --git a/FreeSql/Oracle/OracleExpression.cs b/FreeSql/Oracle/OracleExpression.cs
index 6dde4826..8003f125 100644
--- a/FreeSql/Oracle/OracleExpression.cs
+++ b/FreeSql/Oracle/OracleExpression.cs
@@ -18,7 +18,7 @@ namespace FreeSql.Oracle {
 				case ExpressionType.Convert:
 					var operandExp = (exp as UnaryExpression)?.Operand;
 					var gentype = exp.Type.NullableTypeOrThis();
-					if (gentype != exp.Type.NullableTypeOrThis()) {
+					if (gentype != operandExp.Type.NullableTypeOrThis()) {
 						switch (exp.Type.NullableTypeOrThis().ToString()) {
 							//case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))";
 							case "System.Byte": return $"cast({getExp(operandExp)} as number)";
diff --git a/FreeSql/PostgreSQL/PostgreSQLExpression.cs b/FreeSql/PostgreSQL/PostgreSQLExpression.cs
index 4673d767..2fe5abc5 100644
--- a/FreeSql/PostgreSQL/PostgreSQLExpression.cs
+++ b/FreeSql/PostgreSQL/PostgreSQLExpression.cs
@@ -19,7 +19,7 @@ namespace FreeSql.PostgreSQL {
 				case ExpressionType.Convert:
 					var operandExp = (exp as UnaryExpression)?.Operand;
 					var gentype = exp.Type.NullableTypeOrThis();
-					if (gentype != exp.Type.NullableTypeOrThis()) {
+					if (gentype != operandExp.Type.NullableTypeOrThis()) {
 						switch (exp.Type.NullableTypeOrThis().ToString()) {
 							case "System.Boolean": return $"(({getExp(operandExp)})::varchar not in ('0','false','f','no'))";
 							case "System.Byte": return $"({getExp(operandExp)})::int2";
diff --git a/FreeSql/SqlServer/SqlServerExpression.cs b/FreeSql/SqlServer/SqlServerExpression.cs
index 83cfe810..0dc8e19b 100644
--- a/FreeSql/SqlServer/SqlServerExpression.cs
+++ b/FreeSql/SqlServer/SqlServerExpression.cs
@@ -18,7 +18,7 @@ namespace FreeSql.SqlServer {
 				case ExpressionType.Convert:
 					var operandExp = (exp as UnaryExpression)?.Operand;
 					var gentype = exp.Type.NullableTypeOrThis();
-					if (gentype != exp.Type.NullableTypeOrThis()) {
+					if (gentype != operandExp.Type.NullableTypeOrThis()) {
 						switch (gentype.ToString()) {
 							case "System.Boolean": return $"(cast({getExp(operandExp)} as varchar) not in ('0','false'))";
 							case "System.Byte": return $"cast({getExp(operandExp)} as tinyint)";
diff --git a/FreeSql/Sqlite/SqliteExpression.cs b/FreeSql/Sqlite/SqliteExpression.cs
index 97d2f80c..4af0e9d1 100644
--- a/FreeSql/Sqlite/SqliteExpression.cs
+++ b/FreeSql/Sqlite/SqliteExpression.cs
@@ -18,7 +18,7 @@ namespace FreeSql.Sqlite {
 				case ExpressionType.Convert:
 					var operandExp = (exp as UnaryExpression)?.Operand;
 					var gentype = exp.Type.NullableTypeOrThis();
-					if (gentype != exp.Type.NullableTypeOrThis()) {
+					if (gentype != operandExp.Type.NullableTypeOrThis()) {
 						switch (exp.Type.NullableTypeOrThis().ToString()) {
 							case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))";
 							case "System.Byte": return $"cast({getExp(operandExp)} as int2)";