NHibernate configuration for uni-directional one-to-many relation

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NH3 and above allow to correct save entities in case of uni-directional one-to-many mapping without annoying save null–save–update cycle, if you set both not-null="true" on <key> and inverse="false" on <one-to-many>

FluentNHibernate code snippet for that:

public class MasterMap : ClassMap<Master> 
{
    public MasterMap() 
    {
        Id(x => x.MasterId);
        Map(x => x.Name);
        HasMany(x => x.Details)
            .Not.Inverse()     //these options are very
            .Not.KeyNullable() //important and work only if set together 
            .Not.KeyUpdate()   //to prevent double update
            .Cascade.All();
    }
}

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