- 增加 IndexAttribute 特性，自动迁移索引，以及对应的 FluentApi 方法；

- 移除 ColumnAttribute.Unique 属性设置，改为 IndexAttribute 特性设置唯一键；

FreeSql/Internal/Model/IndexInfo.cs

@@ -0,0 +1,21 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+
+namespace FreeSql.Internal.Model
+{
+    public class IndexInfo
+    {
+        public string Name { get; set; }
+        public IndexColumnInfo[] Columns { get; set; }
+        public bool IsUnique { get; set; }
+    }
+
+    public class IndexColumnInfo
+    {
+        public ColumnInfo Column { get; set; }
+        public bool IsDesc { get; set; }
+    }
+}

FreeSql/Internal/Model/TableInfo.cs

@@ -1,4 +1,5 @@
-using System;
+using FreeSql.DataAnnotations;
+using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Reflection;
@@ -16,7 +17,7 @@ namespace FreeSql.Internal.Model
         public Dictionary<string, ColumnInfo> ColumnsByCsIgnore { get; set; } = new Dictionary<string, ColumnInfo>(StringComparer.CurrentCultureIgnoreCase);
         public ColumnInfo[] ColumnsByPosition { get; set; }
         public ColumnInfo[] Primarys { get; set; }
-        public Dictionary<string, List<ColumnInfo>> Uniques { get; set; }
+        public IndexInfo[] Indexes { get; set; }
         public string CsName { get; set; }
         public string DbName { get; set; }
         public string DbOldName { get; set; }