In fact, by your description, you must have this another scenario:
public class A
{
public virtual long Id { get; set; }
public virtual IList<B> PartialDescriptions { get; protected set; }
public string fullDescription
{
get
{
StringBuilder description = new StringBuilder();
foreach (var partial in PartialDescriptions)
{
description.Append(partial);
}
return description.ToString();
}
}
}
public class B
{
public virtual long Id { get; set; }
public virtual long Id2 { get; set; }
public virtual string Description { get; set; }
}
Then, try to implement your class maps like this:
public class BMap : ClassMap<B>
{
public BMap()
{
Table("B");
CompositeId()
.KeyReference(x => x.Id, "idB")
.KeyProperty(x => x.Id2, "idB2");
Map(x => x.partialDescription, "desc").CustomType("AnsiString");
}
}
public class AMap : ClassMap<A>
{
public AMap()
{
Table("A");
Id(x => x.Dd).Column("idA").GeneratedBy.Native();
HasMany(x => x.PartialDescriptions)
.KeyColumn("idB")
.Inverse()
.Cascade.All()
.Not.LazyLoad();
}
}
NOTE: I didn't tried to compile this code. I only expect that you can take the general .
I recommend you that take a look into Getting started section of Fluent NHibernate to more information.