Fluent NHibernate automapping a private/protected property as the Id

Question

I want to hide the primary key Id property from consumers of my entity classes:

public class A
{
    protected virtual int Id { get; set; }
    public virtual string Name { get; set; }
    ... etc ...
}

Making the Id property protected doesn't work with the standard Automapping, it fails to find it.

I tried overriding DefaultAutomappingConfiguration.IsId(...) but this only gets called back with public members.

How can I get this to work without using specific ClassMap<A>s for each type as documented here: http://wiki.fluentnhibernate.org/Fluent_mapping_private_properties

EDIT: I want to change the automapping conventions to look for any property with the name 'Id', not just public properties. I do not want to configure it on a per-class basis using ClassMap<T> as follows:

public ClassAMap: ClassMap<A>
{  
    public ClassAMap()  
    {  
        Id(Reveal.Member<ClassAMap>("Id"));  
    }  
}
public ClassBMap: ClassMap<B>
{  
    public ClassBMap()  
    {  
        Id(Reveal.Member<ClassBMap>("Id"));  
    }  
}
... etc ...

Yaman Yaman · Accepted Answer · 2012-02-21T18:05:57

If you are using automapping implement the IIdConvention Interface

public class PrimaryKeyConvention : IIdConvention
{
  public void Apply(IIdentityInstance instance)
  {
    instance.Column(instance.EntityType.Name + "Id");
  }
}

Or override the default auto-mapping as following:

public ProductMap : ClassMap<Product>
{  
  public ProductMap()  
  {  
    Id(Reveal.Member<Product>("Id"));  
  }  
}

Fluent NHibernate automapping a private/protected property as the Id

1 Answers