Auditing user using NHibernate Envers fluentconfiguration - nhibernate

Question

I am trying to use NHibernate Envers to log an additional field "user". I have followed several code examples that seem to vary a bit when it comes to syntax, probably because some of them are a bit out of date. However I can't get it to work.
I'm getting this exception:
Only one property may have the attribute [RevisionNumber]!
My Custom Revision Entity:
public class CustomRevisionEntity
{
public virtual int Id { get; set; }
public virtual DateTime RevisionTimestamp { get; set; }
public virtual Guid UserIdentityId { get; set; }
public override bool Equals(object obj)
{
if (this == obj) return true;
var revisionEntity = obj as CustomRevisionEntity;
if (revisionEntity == null) return false;
var that = revisionEntity;
if (Id != that.Id) return false;
return RevisionTimestamp == that.RevisionTimestamp;
}
public override int GetHashCode()
{
var result = Id;
result = 31 * result + (int)(((ulong)RevisionTimestamp.Ticks) ^ (((ulong)RevisionTimestamp.Ticks) >> 32));
return result;
}
}
My IRevisionListener:
public class RevInfoListener : IRevisionListener
{
public void NewRevision(object revisionEntity)
{
var casted = revisionEntity as CustomRevisionEntity;
if (casted != null)
{
casted.UserIdentityId = Guid.NewGuid(); // TODO
}
}
}
First I use mapping by code to map the entity:
_modelMapper.Class<CustomRevisionEntity>(entity =>
{
entity.Property(x => x.Id);
entity.Property(x => x.RevisionTimestamp);
entity.Property(x => x.UserIdentityId);
});
Then I configure Envers and NHibernate
var enversConf = new FluentConfiguration();
enversConf.SetRevisionEntity<CustomRevisionEntity>(x => x.Id, x => x.RevisionTimestamp, new RevInfoListener());
enversConf.Audit<OrganizationEntity>().Exclude(x => x.Version);
configuration.IntegrateWithEnvers(enversConf); // This is the nh-configuration
The last line gives me the exception:
Only one property may have the attribute [RevisionNumber]!
Anyone have any ideas? Myself I would speculate that the default revision entity is still used somehow and when I try to register my custom revision entity this happens.

Answer 1

The error message occurred because the Id property was being mapped twice.
In our mapping class we had this
_modelMapper.BeforeMapClass += (modelInspector, type, classCustomizer) => classCustomizer.Id(type.GetProperty("Id"), (idMapper) =>
{
idMapper.Access(Accessor.Property);
idMapper.Generator(Generators.GuidComb);
});
Then we tried mapping Id again as a property of the CustomRevisionEntity
The final mapping:
_modelMapper.Class<CustomRevisionEntity>(entity =>
{
entity.Id<int>(x => x.Id, mapper => mapper.Generator(Generators.Identity));
entity.Property(x => x.RevisionDate);
entity.Property(x => x.UserIdentityId);
});