NHibernate Fluent CompositeId with CustomType mapping

Question

I have trouble creating the following mapping:

CompositeId(x => x.Id)
    .KeyProperty(x => x.SiteId, "SiteID")
    .KeyProperty(x => x.SomeId, "SomeId")
    .KeyProperty(x => x.AnotherId, "AnotherId")
    .KeyProperty(x => x.Dtg, "DTG");

Previously Dtg is not part of CompositeId so I can just put Dtg as:

Map(x => x.Dtg, "DTG").CustomType("DateTime2");

It requires DateTime2 as millisecond is required.

Now due to a change I will have to make Dtg as part of CompositeId.

So how do I put CustomType to Dtg? thanks for your help.

Answer 1

Solution found, adding .CustomType<TimestampType>() does not truncate milliseconds:

CompositeId(x => x.Id)
.KeyProperty(x => x.SiteId, "SiteID")
.KeyProperty(x => x.SomeId, "SomeId")
.KeyProperty(x => x.AnotherId, "AnotherId")
.KeyProperty(x => x.Dtg, "DTG").CustomType<TimestampType>();