Question

I have the following scenario:

public class Login
{
    public virtual int Id { get; set; }
    public virtual string Username { get; set; }
}

public class User : Login
{
    public IList<Account> Accounts { get; set; }
}

If I have two maps (ClassMap<Login> and ClassMap<User>), all queries returns double results – one per maps I’d guess.

Is it possible to avoid this? I don’t have a discriminator value. There are a lot more properties on the user, so I’d like to be able to just get a sub set of these via the login.

Answer 1

Since User extends Login, querying Login will, by default, return User instances too.

To avoid this, polymorphism="explicit" must be used in the XML mappings.

For Fluent mappings, use Polymorphism.Explicit().