IPreUpdateEventListener and dynamic-update=“true”

Question

I have been trying to do a very simple auditing scenario following Ayende\'s blog which seem to be the resource everyone is refering to when it comes to IPreUpdateEventListe

Answer 1

I ran into this exact issue. This is how I fixed it:

public class MyFlushEntityEventListener : DefaultFlushEntityEventListener
{
    protected override void DirtyCheck(FlushEntityEvent e)
    {
        base.DirtyCheck(e);
        if (e.DirtyProperties != null &&
            e.DirtyProperties.Any() &&
            //ITrackUpdate is my inteface for audited entities
            e.Entity is ITrackUpdate)
            e.DirtyProperties = e.DirtyProperties
             .Concat(GetAdditionalDirtyProperties(e)).ToArray();
    }

    static IEnumerable<int> GetAdditionalDirtyProperties(FlushEntityEvent @event)
    {
        yield return Array.IndexOf(@event.EntityEntry.Persister.PropertyNames, 
                                   "UpdateTime");
        yield return Array.IndexOf(@event.EntityEntry.Persister.PropertyNames, 
                                   "UpdateUser");
        //You can add any additional properties here.
        //Some of my entities do not track the user, for example.
    }
}

Then, just replace the event listener in the NH config file:

<listener type="flush-entity"
          class="MyFlushEntityEventListener, MyAssembly"/>

Answer 2

I had the same issue, however I found I could work around it by using OnFlushDirty.

You can find my solution here.