Odpověď by byla skryta/odhalena v tomto citátu z Ayendeho článku
Toto je kód ukazující, jak na to, ze stejného článku:
public class AuditEventListener : IPreUpdateEventListener, IPreInsertEventListener
{
public bool OnPreUpdate(PreUpdateEvent @event)
{
var audit = @event.Entity as IHaveAuditInformation;
if (audit == null)
return false;
var time = DateTime.Now;
var name = WindowsIdentity.GetCurrent().Name;
Set(@event.Persister, @event.State, "UpdatedAt", time);
Set(@event.Persister, @event.State, "UpdatedBy", name);
audit.UpdatedAt = time;
audit.UpdatedBy = name;
return false;
}
public bool OnPreInsert(PreInsertEvent @event)
{
var audit = @event.Entity as IHaveAuditInformation;
if (audit == null)
return false;
var time = DateTime.Now;
var name = WindowsIdentity.GetCurrent().Name;
Set(@event.Persister, @event.State, "CreatedAt", time);
Set(@event.Persister, @event.State, "UpdatedAt", time);
Set(@event.Persister, @event.State, "CreatedBy", name);
Set(@event.Persister, @event.State, "UpdatedBy", name);
audit.CreatedAt = time;
audit.CreatedBy = name;
audit.UpdatedAt = time;
audit.UpdatedBy = name;
return false;
}
A tady je kouzelné Set()
private void Set(IEntityPersister persister, object[] state
, string propertyName, object value)
{
var index = Array.IndexOf(persister.PropertyNames, propertyName);
if (index == -1)
return;
state[index] = value;
}