当基类在流畅的nhibernate中抽象时,如何实现每个具体类的表？

Question

我有以下场景

public abstract class BaseClass
{
  public virtual int Id {get; set};
  public virtual string Name {get; set;}
}

public class FirstSubClass : BaseClass
{
   //properties and behaviour here
}

public class SecondSubClass : BaseClass
{
  //properties of SecondSubclass Here
}

public class ProcessStep
{
   public virtual IList<BaseClass> ContentElements {get; set;}  
}

对于映射我使用了以下代码片段: -

this._sessionFactory =
                          Fluently.Configure().Database(SQLiteConfiguration.Standard
                          .ConnectionString(@"Data Source=SqliteTestSqlDataAccess.s3db;    Version=3; New=True; Pooling=True; Max Pool Size=1;"))
                          .Mappings(m => m.AutoMappings.Add(AutoMap.Assembly(assemblyWithDomainClasses).Conventions.Add(DefaultCascade.All())))
                          .ExposeConfiguration(BuildSchema)
                          .BuildSessionFactory();

默认情况下,fluent将忽略作为BaseClass的抽象基类.但是在ProcessStep类中有返回IList的属性ContentElements ,我得到一个异常: - NHibernate.MappingException:关联引用未映射的类:BaseClass

如果我使用IncludeBase(typeof(BaseClass))包含基类,那么它工作正常,但它为BaseClass和Derived类创建一个表,并且记录与FK-PK关系(每个子类的表)链接.我想要实现的是每个具体类的表.也就是说,每个派生类都有自己的表,其中将存在基类中派生类+属性的所有属性.知道如何实现它吗？

Answer 1

由于我没有看到你的映射,让我提供我的.你可以通过这样做来实现这一点

public class BaseClassMap:ClassMap<BaseClass>
{
    public BaseClassMap()
    {
        /*
         * Identity generator can't be native because subclass objects should be unique
         * So use HiLo or Guid or other generators which will generate unique id on the child tables
         */
        Id(x => x.Id).GeneratedBy.Guid(); 
        Map(x => x.Name);
        UseUnionSubclassForInheritanceMapping(); // This is important - uses union-subclass mappings for the derived classes
    }
}

public class FirstSubClassMap : SubclassMap<FirstSubClass>
{
    public FirstSubClassMap()
    {
        Table("FirstSubClassTable");
        // Map properties for FirstSubClass
    }
}

public class SecondSubClassMap : SubclassMap<SecondSubClass>
{
    public SecondSubClassMap()
    {
        Table("SecondSubClassTable");
        // Map properties for SecondSubClass
    }
}