映射继承的实体

Question

我使用 Fluent Nhibernate（很高兴），但在映射某些实体时遇到一些麻烦：

  public enum AdverticeType { None,Image,Flash,Script}      

  public class Advertice      
  {
      public virtual int ID { get;set;}
      public virtual string Name { get;set;}
      public virtual AdverticeType AdverticeType  { get;set;}
  }

  public class ImageAdvertice : Advertice
  {
       public virtual int ID { get;set;}
       public virtual string Path { get;set;}
       public virtual string URL { get;set;}
  }

  public class ScriptAdvertice : Advertice
  {
       public virtual int ID { get;set;}
       public virtual string Code { get;set;}
  }

How do i map toEntity so the ID in ScriptAdvertice is generated by ID in Advertice.

Answer 1

使用 ClassMap 映射 Advertice，使用 SubclassMap 映射 ImageAdvertice 和 ScriptAdvertice。

例如

public class AdverticeMap : ClassMap<Advertice>
{
  public AdverticeMap()
  {
    Id(x => x.ID);
  }
}

public class ImageAdverticeMap : SubclassMap<ImageAdvertice>
{
  public ImageAdverticeMap()
  {}
}

public class ScriptAdverticeMap : SubclassMap<ScriptAdvertice>
{
  public ScriptAdverticeMap()
  {}
}