流利的NHibernate繼承映射問題

Question

我使用Fluent NHibernate和每個子類的繼承映射。 我想引用特定對象的列表，但我無法弄清楚，如何將結果復原到某個特定類的對象。

class PetMap : ClassMap<Pet> 
{ 
    public PetMap() 
    { 
     Id(c => c.ID).GeneratedBy.Identity();    
    } 
} 

class DogMap : ClassMap<Dog> 
{ 
    public DogMap() 
    { 
     Mac(c => c.DogSpecificProperty);         
    } 
} 

class CatMap : SubclassMap<Cat> 
{ 
    public CatMap() 
    { 
     Mac(c => c.CatSpecificProperty);          
    } 
} 

class PersonMap : ClassMap<Person> 
{ 
    public PersonMap() 
    { 
     Id(c => c.ID).GeneratedBy.Identity(); 

     //this works fine 
     HasMany(c => c.Pets); 

     //this dosen't work, because the result contains dogs and cats 
     //how can I tell NHibernate to only fetch dogs or cats? 
     HasMany<Pet>(c => c.Cats); 
     HasMany<Pet>(c => c.Dogs); 
    } 
} 

class Pet 
{ 
    int ID; 
} 
class Dog : Pet 
{ 
    object DogSpecificProperty; 
} 
class Cat : Pet 
{ 
    object CatSpecificProperty; 
} 
class Person 
{ 
    int ID; 
    IList<Pet> Pets; 
    IList<Dog> Dogs; 
    IList<Cat> Cats; 
} 

任何人都可以幫助我嗎？請原諒我可憐的英語。

Answer 1

我不流利的NH的專家，但在我看來，你的個人地圖應該是這樣的：

class PersonMap : ClassMap<Person> 
{ 
    public PersonMap() 
    { 
     Id(c => c.ID).GeneratedBy.Identity(); 

     //this works fine 
     HasMany(c => c.Pets); 

     //this dosen't work, because the result contains dogs and cats 
     //how can I tell NHibernate to only fetch dogs or cats? 
     HasMany<Cat>(c => c.Cats); 
     HasMany<Dog>(c => c.Dogs); 
    } 
} 

因爲你是人有狗屬性，它是一個IList不IList的，而對於貓來說則相反。