NHibernate - No persister for: System.Guid

Question

This problem seems a little more interesting that the usual mapping problems.

I have a method that will execute a delete with NHibernate but I am hung on some apparently simple issue. I have looked over various other similar issues that might relate to this but after a couple of hours I am hung up on it.

I have this method:

    public void DeleteOrganization(Guid actorId)
    {
        using (var session = _nhibernate.OpenSession())
        {
            ITransaction transaction = session.BeginTransaction();
            try
            {
                session.Delete(actorId);
                transaction.Commit();
            }
            catch (Exception)
            {
                transaction.Rollback();
                throw;
            }
        }
    }

And this HBM map:

    <class name="Actor, Domain.Entities" table="Actor" lazy="false">
    <id name="ActorId" column="ActorId" type="Guid" unsaved-value="00000000-0000-0000-0000-000000000000">
        <generator class="guid" />
    </id>

I still seem to get stuck here. The kicker is that it is hung on the Guid. Any ideas?

Answer 1

The trouble here was that I was mapping an Organization object and trying to delete the id(not the record itself). In my previous code, I should have been trying to delete the Organization object. The correct code is as follows:

public void DeleteOrganization(Guid actorId)
{
    using (var session = _nhibernate.OpenSession())
    {
        ITransaction transaction = session.BeginTransaction();
        try
        {
            var Organization = (from p in session.Query<Organization>()
                                       where p.ActorId == actorId
                                       orderby p
                                       select p).First();

            session.Delete(Organization);
            transaction.Commit();
        }
        catch (Exception)
        {
            transaction.Rollback();
            throw;
        }
    }
}