- 优化 DbContext/Repository Update 实体有 ServerTime 既使无状态变化也必然更新的逻辑；

Author: 2881099

FreeSql.DbContext/FreeSql.DbContext.xml

@@ -593,6 +593,55 @@ class BeginEdit01
             public Guid Id { get; set; }
             public string Name { get; set; }
         }
+        [Fact]
+        public void BeginEditIdentity()
+        {
+            g.sqlite.Delete<BeginEdit02>().Where("1=1").ExecuteAffrows();
+            var repo = g.sqlite.GetRepository<BeginEdit02>();
+            var cts = new[] {
+                new BeginEdit02 { Name = "分类1" },
+                new BeginEdit02 { Name = "分类1_1" },
+                new BeginEdit02 { Name = "分类1_2" },
+                new BeginEdit02 { Name = "分类1_3" },
+                new BeginEdit02 { Name = "分类2" },
+                new BeginEdit02 { Name = "分类2_1" },
+                new BeginEdit02 { Name = "分类2_2" }
+            }.ToList();
+            repo.Insert(cts);
+
+            repo.BeginEdit(cts);
+
+            cts.Add(new BeginEdit02 { Name = "分类2_3" });
+            cts[0].Name = "123123";
+            cts.RemoveAt(1);
+
+            Assert.Equal(3, repo.EndEdit());
+
+            g.sqlite.Delete<BeginEdit02>().Where("1=1").ExecuteAffrows();
+            repo = g.sqlite.GetRepository<BeginEdit02>();
+            cts = repo.Select.ToList();
+            repo.BeginEdit(cts);
+
+            cts.AddRange(new[] {
+                new BeginEdit02 { Name = "分类1" },
+                new BeginEdit02 { Name = "分类1_1" },
+                new BeginEdit02 { Name = "分类1_2" },
+                new BeginEdit02 { Name = "分类1_3" },
+                new BeginEdit02 { Name = "分类2" },
+                new BeginEdit02 { Name = "分类2_1" },
+                new BeginEdit02 { Name = "分类2_2" }
+            });
+
+            Assert.Equal(7, repo.EndEdit());
+        }
+        class BeginEdit02
+        {
+            [Column(IsIdentity = true)]
+            public int Id { get; set; }
+            public string Name { get; set; }
+            [Column(ServerTime = DateTimeKind.Utc)]
+            public DateTime UpdateTime { get; set; }
+        }
 
         [Fact]
         public void OrmScoped()

FreeSql.Tests/FreeSql.Tests.DbContext/RepositoryTests.cs

@@ -604,7 +604,15 @@ public static string[] CompareEntityValueReturnColumns(this IFreeSql orm, Type e
                 exps.Add(Expression.Label(returnTarget, Expression.Constant(new string[0])));
                 return Expression.Lambda<Func<object, object, bool, string[]>>(Expression.Block(new[] { var1Ret, var1Parm, var2Parm }, exps), new[] { parm1, parm2, parm3 }).Compile();
             });
-            return func(entity1, entity2, isEqual);
+            var result = func(entity1, entity2, isEqual);
+            var tmptb = orm.CodeFirst.GetTableByEntity(entityType);
+            if (tmptb.ColumnsByCanUpdateDbUpdateValue.Length > 0) {
+                if (isEqual && result.Length + tmptb.ColumnsByCanUpdateDbUpdateValue.Length == tmptb.ColumnsByCs.Count)
+                    return result.Concat(tmptb.ColumnsByCanUpdateDbUpdateValue.Select(a => a.Attribute.Name)).ToArray();
+                if (!isEqual && result.Length == tmptb.ColumnsByCanUpdateDbUpdateValue.Length)
+                    return new string[0];
+            }
+            return result;
         }
 
         static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object, string, int>>> _dicSetEntityIncrByWithPropertyName = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object, string, int>>>();

FreeSql/Extensions/EntityUtilExtensions.cs

@@ -17,6 +17,7 @@ public class TableInfo
         public Dictionary<string, ColumnInfo> ColumnsByCs { get; set; } = new Dictionary<string, ColumnInfo>(StringComparer.CurrentCultureIgnoreCase);
         public Dictionary<string, ColumnInfo> ColumnsByCsIgnore { get; set; } = new Dictionary<string, ColumnInfo>(StringComparer.CurrentCultureIgnoreCase);
         public ColumnInfo[] ColumnsByPosition { get; set; }
+        public ColumnInfo[] ColumnsByCanUpdateDbUpdateValue { get; set; }
         public ColumnInfo[] Primarys { get; set; }
         public IndexInfo[] Indexes { get; set; }
         public string CsName { get; set; }

FreeSql/Internal/Model/TableInfo.cs

@@ -484,6 +484,7 @@ internal static TableInfo GetTableByEntity(Type entity, CommonUtils common)
             trytb.ColumnsByPosition = columnsList.Where(a => a.Attribute.Position > 0).OrderBy(a => a.Attribute.Position)
                 .Concat(columnsList.Where(a => a.Attribute.Position == 0))
                 .Concat(columnsList.Where(a => a.Attribute.Position < 0).OrderBy(a => a.Attribute.Position)).ToArray();
+            trytb.ColumnsByCanUpdateDbUpdateValue = columnsList.Where(a => a.Attribute.CanUpdate == true && string.IsNullOrEmpty(a.DbUpdateValue) == false).ToArray();
 
             trytb.Primarys = trytb.Columns.Values.Where(a => a.Attribute.IsPrimary == true).ToArray();
             if (trytb.Primarys.Any() == false)