How do you map an enum as an int value with fluent NHibernate?

Question

Question says it all really, the default is for it to map as a string but I need it to map as an int.

I\'m currently using Persistenc

Answer 1

For those using Fluent NHibernate with Automapping (and potentially an IoC container):

The IUserTypeConvention is as @Julien's answer above: https://stackoverflow.com/a/1706462/878612

public class EnumConvention : IUserTypeConvention
{
    public void Accept(IAcceptanceCriteria criteria)
    {
        criteria.Expect(x => x.Property.PropertyType.IsEnum);
    }

    public void Apply(IPropertyInstance target)
    {
        target.CustomType(target.Property.PropertyType);
    }
}

The Fluent NHibernate Automapping configuration could be configured like this:

    protected virtual ISessionFactory CreateSessionFactory()
    {
        return Fluently.Configure()
            .Database(SetupDatabase)
            .Mappings(mappingConfiguration =>
                {
                    mappingConfiguration.AutoMappings
                        .Add(CreateAutomappings);
                }
            ).BuildSessionFactory();
    }

    protected virtual IPersistenceConfigurer SetupDatabase()
    {
        return MsSqlConfiguration.MsSql2008.UseOuterJoin()
        .ConnectionString(x => 
             x.FromConnectionStringWithKey("AppDatabase")) // In Web.config
        .ShowSql();
    }

    protected static AutoPersistenceModel CreateAutomappings()
    {
        return AutoMap.AssemblyOf(
            new EntityAutomapConfiguration())
            .Conventions.Setup(c =>
                {
                    // Other IUserTypeConvention classes here
                    c.Add();
                });
    }

*Then the CreateSessionFactory can be utilized in an IoC such as Castle Windsor (using a PersistenceFacility and installer) easily. *

    Kernel.Register(
        Component.For()
            .UsingFactoryMethod(() => CreateSessionFactory()),
            Component.For()
            .UsingFactoryMethod(k => k.Resolve().OpenSession())
            .LifestylePerWebRequest() 
    );