FluentNHibernate mapping for Dictionary

Question

What is the best way of mapping a simple Dictionary property using Fluent NHibernate?

Answer 1

Using a simple class relationship such as the following:

public class Foo {
    public virtual IDictionary Bars { get; set; }
}

public class Bar {
    public virtual string Type { get; set; }
    public virtual int Value { get; set; }
}

You can map this with Fluent NHibernate in this way:

mapping.HasMany(x => x.Bars)
       .AsMap(x => x.Type);

Where Bar.Type is used as the key field into the dictionary.