In this case I prefer a <generated> value by a trigger.
2008/12/18 Stefan Sedich <[email protected]>
>
> Hello,
>
> I am setting date last modified audit on an entity, I implement an
> IAuditableEntity interface and use a helper to set the date modified:
>
> public override bool OnFlushDirty(object entity, object id, object[]
> currentState, object[] previousState, string[] propertyNames,
> global::NHibernate.Type.IType[] types) {
>
> if (typeof(IAuditableEntity).IsAssignableFrom(entity.GetType()))
> {
>
> // If entity is auditable as this is only an update
> set the last modified date.
> SetValue(propertyNames, currentState, item =>
> item.LastModified, DateTime.Now);
>
> }
>
> return false;
> }
>
>
> Type safe helper:
>
> public void SetValue<T>(string[] propertyNames, object[] state,
> Expression<System.Func<IAuditableEntity, T>> propertyExpression, T
> value) {
>
> var memberExpression = propertyExpression.Body as
> MemberExpression;
> if (memberExpression == null)
> throw new ArgumentException("The member expression was
> not a valid member expression.");
>
> string name = memberExpression.Member.Name;
> int index = propertyNames.ToList().IndexOf(name);
>
> if(index == -1)
> throw new
> InvalidOperationException(string.Format("Property {0} does no exist on
> entity.", name));
>
> state[index] = value;
>
> }
>
>
> Now the question is, I saw that you must set the current state and not
> the entity directly why would
>
> var ent = entity as IAuditableEntity;
> ent.LastModified = DateTime.Now;
>
> Not work properly or will it be fine to do this?
>
>
>
> Thanks
>
> --
> Stefan Sedich
> Software Developer
> http://weblogs.asp.net/stefansedich
>
> >
>
--
Fabio Maulo
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