Fluent NHibernate inheritance mapping problem
I am using Fluent NHibernate with table per subclass inheritance mapping.
I want to reference to a list of specific objects, but i can't figure out, how to restict the result to objects of one specific class.
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<Ca开发者_运维百科t>
{
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;
}
Can anyone help me? Please excuse my poor english.
I'm not an expert in Fluent NH, but it seems to me that your person map should look like this:
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);
}
}
Because you're Person has a Dogs property which is an IList not IList, and conversely the same for Cats.
加载中,请稍侯......
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