增加 FreeSql.Extensions.BaseEntity 项目

Extensions/FreeSql.Extensions.BaseEntity/BaseEntityAsyncTKey.cs

@@ -0,0 +1,44 @@
+using FreeSql;
+using FreeSql.DataAnnotations;
+using System;
+using System.Data;
+using System.Diagnostics;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+/// <summary>
+/// 包括 CreateTime/UpdateTime/IsDeleted、CRUD 异步方法、以及 ID 主键定义 的实体基类
+/// <para></para>
+/// 当 TKey 为 int/long 时，Id 主键被设为自增值主键
+/// </summary>
+/// <typeparam name="TEntity"></typeparam>
+/// <typeparam name="TKey"></typeparam>
+[Table(DisableSyncStructure = true)]
+public abstract class BaseEntityAsync<TEntity, TKey> : BaseEntityAsync<TEntity> where TEntity : class
+{
+    static BaseEntityAsync()
+    {
+        var tkeyType = typeof(TKey)?.NullableTypeOrThis();
+        if (tkeyType == typeof(int) || tkeyType == typeof(long))
+            Orm.CodeFirst.ConfigEntity(typeof(TEntity),
+                t => t.Property("Id").IsIdentity(true));
+    }
+
+    /// <summary>
+    /// 主键
+    /// </summary>
+    public virtual TKey Id { get; set; }
+
+    /// <summary>
+    /// 根据主键值获取数据
+    /// </summary>
+    /// <param name="id"></param>
+    /// <returns></returns>
+    async public static Task<TEntity> FindAsync(TKey id)
+    {
+        var item = await Select.WhereDynamic(id).FirstAsync();
+        (item as BaseEntity<TEntity>)?.Attach();
+        return item;
+    }
+}