NHibernate: how to enable lazy loading on one-to-one mapping

Question

One-to-one relations within nhibernate can be lazyloaded either \"false\" or \"proxy\". I was wondering if anyone knows a way to do a lazy one-to-one mapping.

I work

Answer 1

After reading the answers here, I´ve manage to get it to work. I´m just going to add this example because I´m using a One to One relation with Constrained= False and because it´s a Mapping by Code Example

Two Classes:

public class Pedido:BaseModel
{
    public virtual BuscaBase Busca { get; set; }
}

public class BuscaBase : BaseModel
    {       
        public virtual Pedido Pedido { get; set; }
    }

Mappings:

public class PedidoMap : ClassMapping
{
    public PedidoMap()
    {
         Id(x => x.Id, x => x.Generator(Generators.Identity));            

         ManyToOne(x => x.Busca, m => 
         { 
             m.Cascade(Cascade.DeleteOrphans);
             m.NotNullable(true); m.Unique(true);
             m.Class(typeof(BuscaBase));
         });    
    }
}

public class BuscaBaseMap : ClassMapping
{
    public BuscaBaseMap()
    {            
        Id(x => x.Id, x => x.Generator(Generators.Sequence, g => g.Params(new { sequence = "buscaefetuada_id_seq" })));

        OneToOne(x => x.Pedido, m =>
        {
            m.Lazy(LazyRelation.NoProxy);
            m.Constrained(false);
            m.Cascade(Cascade.None);
            m.Class(typeof(Pedido));
        });            
    }
}

Note: I was Using for the one-to-one mapping m.PropertyReference(typeof(Pedido).GetProperty("Busca")); but this does't work for the lazy loading. You have to specify the relation using the Class

A quick brief about the Constrained = False used in here, the "Pedido" object might not exist in "BuscaBase" object.