using FreeSql.DataAnnotations;

namespace F9WebAiTest.Domain.Entities;

/// <summary>
/// DDD 业务实体基类：Entity + 审计字段（CreatedBy/UpdateBy/DeletedAt）。
/// 参考 BBIT.F9.Domain.Entities.BusinessEntity
/// </summary>
public abstract class BusinessEntity : Entity
{
    /// <summary>创建人</summary>
    [Column(Name = "created_by")]
    public string CreatedBy { get; set; }

    /// <summary>修改人</summary>
    [Column(Name = "update_by")]
    public string UpdateBy { get; set; }

    /// <summary>逻辑删除时间（null=未删除）</summary>
    [Column(Name = "deleted_at")]
    public DateTime? DeletedAt { get; protected set; }
}