修复 DbContext bug

Examples/dbcontext_01/Program.cs

@@ -1,8 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
+using System.Numerics;
 using System.Threading.Tasks;
+using FreeSql;
+using FreeSql.DataAnnotations;
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
@@ -12,8 +16,47 @@ namespace dbcontext_01
 {
     public class Program
     {
-        public static void Main(string[] args)
+
-        {
+		public class Song {
+			[Column(IsIdentity = true)]
+			public int Id { get; set; }
+			public string BigNumber { get; set; }
+
+			[Column(IsVersion = true)]//使用简单
+			public long versionRow { get; set; }
+		}
+
+		public class SongContext : DbContext {
+
+			public DbSet<Song> Songs { get; set; }
+
+			protected override void OnConfiguring(DbContextOptionsBuilder builder) {
+				builder.UseFreeSql(fsql);
+			}
+		}
+		static IFreeSql fsql;
+		public static void Main(string[] args) {
+			fsql = new FreeSql.FreeSqlBuilder()
+				.UseConnectionString(FreeSql.DataType.Sqlite, @"Data Source=|DataDirectory|\dd2.db;Pooling=true;Max Pool Size=10")
+				.UseAutoSyncStructure(true)
+				.UseLazyLoading(true)
+				.UseNoneCommandParameter(true)
+
+				.UseMonitorCommand(cmd => Trace.WriteLine(cmd.CommandText))
+				.Build();
+
+			using (var ctx = new SongContext()) {
+				var song = new Song { BigNumber = "1000000000000000000" };
+				ctx.Songs.Add(song);
+
+				ctx.Songs.Update(song);
+
+				song.BigNumber = (BigInteger.Parse(song.BigNumber) + 1).ToString();
+				ctx.Songs.Update(song);
+
+				ctx.SaveChanges();
+			}
+
 			CreateWebHostBuilder(args).Build().Run();
 		}
 

FreeSql.DbContext/DbContext/DbContextSync.cs

@@ -59,11 +59,17 @@ namespace FreeSql {
 					states.RemoveAt(states.Count - 1);
 					return;
 				}
+				if (affrows == -998 || affrows == -997) { //没有执行更新
+					var laststate = states[states.Count - 1];
+					states.Clear();
+					if (affrows == -997) states.Add(laststate); //保留最后一个
+				}
 				if (affrows > 0) {
 					_affrows += affrows;
 					var islastNotUpdated = states.Count != affrows;
+					var laststate = states[states.Count - 1];
 					states.Clear();
-					if (islastNotUpdated) states.Add(oldinfo.state);
+					if (islastNotUpdated) states.Add(laststate); //保留最后一个
 				}
 			};
 

FreeSql.DbContext/DbSet/DbSet.cs

@@ -76,6 +76,7 @@ namespace FreeSql {
 				this.Key = key;
 				this.Time = DateTime.Now;
 			}
+			public TEntity OldValue { get; set; }
 			public TEntity Value { get; set; }
 			public string Key { get; set; }
 			public DateTime Time { get; set; }

FreeSql.DbContext/DbSet/DbSetSync.cs

@@ -156,7 +156,7 @@ namespace FreeSql {
 			if (data?.Count > 0) {
 
 				if (cuig.Length == _table.Columns.Count)
-					return data.Count;
+					return ups.Length == data.Count ? -998 : -997;
 
 				var updateSource = data.Select(a => a.Value).ToArray();
 				var update = this.OrmUpdate(null).SetSource(updateSource).IgnoreColumns(cuig);
@@ -166,6 +166,8 @@ namespace FreeSql {
 				foreach (var newval in data) {
 					if (_states.TryGetValue(newval.Key, out var tryold))
 						_fsql.MapEntityValue(newval.Value, tryold.Value);
+					if (newval.OldValue != null)
+						_fsql.MapEntityValue(newval.Value, newval.OldValue);
 				}
 				return affrows;
 			}
@@ -176,7 +178,9 @@ namespace FreeSql {
 
 		void UpdatePriv(TEntity data, bool isCheck) {
 			if (isCheck && CanUpdate(data, true) == false) return;
-			EnqueueAction(DbContext.ExecCommandInfoType.Update, this, typeof(EntityState), CreateEntityState(data));
+			var state = CreateEntityState(data);
+			state.OldValue = data;
+			EnqueueAction(DbContext.ExecCommandInfoType.Update, this, typeof(EntityState), state);
 		}
 		public void Update(TEntity data) => UpdatePriv(data, true);
 		public void UpdateRange(TEntity[] data) {

FreeSql.DbContext/FreeSql.DbContext.csproj

@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<TargetFramework>netstandard2.0</TargetFramework>
-		<Version>0.3.27</Version>
+		<Version>0.3.27.1</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>