c# - 流利的 Nhibernate : how to add an extra attribute to a relationship (aka relationship attribute)

Question

我有两个实体，相册和照片，它们之间存在多对多关系。一切正常。我想要的是添加一个关系属性，即除了 album_id 和 photo_id 之外的映射的额外属性，例如添加照片的日期时间或表明照片在该相册中是否可见的属性。

public class Photo
{   public virtual int Id { get; set; }
    public virtual string Title { get; set; }
    public virtual ICollection<Album> Albums { get; set; }
}

public class Album
{
public virtual int Id {get;set;}
    public virtual string Title {get;set;}
    public virtual ICollection<Photo> Photos { get; set; }
}

当前的映射是这样的:

public class PhotosMap : ClassMap<Photo>
{
   public PhotosMap()
      {
         Id(x => x.Id);
         Map(x => x.Title); 
         HasManyToMany<Album>(x => x.Albums).Not.LazyLoad().Table("album_photos");               
         Table("photos");
      }
}

public class AlbumsMap : ClassMap<Album>
{
   public AlbumsMap()
     {
         Id(x => x.Id);
         Map(x => x.Title);                
         HasManyToMany<Photo>(x => x.Photos).Inverse().Not.LazyLoad().Table("album_photos");
         Table("album");
     }
 }

Answer 1

你不能。您现在需要显式建模和映射该映射表。