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我是流利nhibernate的新手。我正在开发一个项目包含以下在其数据库中3个表： “人”， “RealPerson”和 “LegalPerson”nhibernate无法确定实体异常的类型
这三个表有关系如上图： 
所有实体在我的代码，如这三个实体都是从这里基本的实体类继承的是这些实体
public class Person : Entity
{
public virtual RealPerson RealPerson { set; get; }
public virtual LegalPerson LegalPerson { set; get; }
}
public class RealPerson : Entity
{
public virtual string FirstName { set; get; }
public virtual string LastName { set; get; }
public virtual string FatherName { set; get; }
public virtual string NationalCode { set; get; }
public virtual DateTime BirthDate { set; get; }
public virtual string PhoneNumber { set; get; }
public virtual string MobileNumber { set; get; }
public virtual string EmailAddress { set; get; }
public virtual string HomeAddress { set; get; }
public virtual string WorkAddress { set; get; }
public virtual RealPerson Proxy { set; get; }
}
public class LegalPerson : Entity
{
public virtual string LegalPerson_Name { set; get; }
public virtual string RegistrationNumber { set; get; }
public virtual string Address { set; get; }
public virtual string PhoneNumber1 { set; get; }
public virtual string PhoneNumber2 { set; get; }
public virtual string PhoneNumber3 { set; get; }
public virtual RealPerson Proxy { set; get; }
}
和基实体类的代码的代码如下：
public class Entity
{
protected bool Equals(Entity other)
{
if (other == null)
return false;
if (Id == Guid.Empty || other.Id == Guid.Empty)
return base.Equals(other);
return Id.Equals(other.Id);
}
public virtual Guid Id { set; get; }
public override int GetHashCode()
{
return Id.GetHashCode();
}
public override bool Equals(object obj)
{
if (obj is Entity)
return Equals((Entity)obj);
return base.Equals(obj);
}
protected ISession Session
{
get { return SessionAccountant.GetSession(); }
}
public virtual void Save()
{
Session.SaveOrUpdate(this);
}
public virtual void Delete()
{
Session.Delete(this);
}
}
最后classmaps如下：
public class PersonMapping : ClassMap<Person>
{
public PersonMapping()
{
Table("Person");
Id(x => x.Id).GeneratedBy.GuidComb().Column("Person_Id");
References(x => x.RealPerson).Nullable().LazyLoad().Column("RealPerson_Id");
References(x => x.LegalPerson).Nullable().LazyLoad().Column("LegalPerson_Id");
}
}
public class RealPersonMapping : ClassMap<RealPerson>
{
public RealPersonMapping()
{
Table("RealPerson");
Id(x => x.Id).GeneratedBy.GuidComb().Column("RealPerson_Id");
Map(x => x.FirstName).Not.Nullable().Column("FirstName");
Map(x => x.LastName).Not.Nullable().Column("LastName");
Map(x => x.FatherName).Not.Nullable().Column("FatherName");
Map(x => x.NationalCode).Not.Nullable().Column("NationalCode");
Map(x => x.BirthDate).Nullable().Column("BirthDate");
Map(x => x.ShenasnamehNumber).Nullable().Column("ShenasnamehNumber");
Map(x => x.PhoneNumber).Nullable().Column("PhoneNumber");
Map(x => x.MobileNumber).Nullable().Column("MobileNumber");
Map(x => x.EmailAddress).Nullable().Column("EmailAddress");
Map(x => x.HomeAddress).Nullable().Column("HomeAddress");
Map(x => x.WorkAddress).Nullable().Column("WorkAddress");
References(x => x.Proxy).Nullable().LazyLoad().Column("Proxy_Id");
}
}
public class LegalPersonMapping : ClassMap<LegalPerson>
{
public LegalPersonMapping()
{
Table("LegalPerson");
Id(x => x.Id).GeneratedBy.GuidComb().Column("LegalPerson_Id");
Map(x => x.LegalPerson_Name).Not.Nullable().Column("LegalPerson_Name");
Map(x => x.RegistrationNumber).Not.Nullable().Column("RegistrationNumber");
Map(x => x.Address).Not.Nullable().Column("Address");
Map(x => x.PhoneNumber1).Nullable().Column("PhoneNumber1");
Map(x => x.PhoneNumber2).Nullable().Column("PhoneNumber2");
Map(x => x.PhoneNumber3).Nullable().Column("PhoneNumber3");
References(x => x.Proxy).Nullable().LazyLoad().Column("Proxy_Id");
}
}
我设置的配置，并创建一个会话。但是当我运行该项目，我在运行时得到此异常： 类型的未处理的异常“NHibernate.MappingException”发生在NHibernate.dll
其他信息：无法确定类型：EntitiesClasses.Person
这段代码有什么问题？！