saving objects in NHibernate IInterceptor
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18-09-2019 - |
Question
I set up an IInterceptor for ILoggable objects in my domain model. And on OnFlushDirty event, i am trying to save a log (audit). But while doing this, my code goes into an infinite loop.
_logrepository.Save(log) calls OnFlushDirty even if log is not an ILoggable object (it is because entity is still the previous object)
Is there a way to use .Save (without opening another session) in IInterceptor, or how do I insert a log into database in IInterceptor?
public override bool OnFlushDirty(object entity, object id, object[] currentState, object[] previousState, string[] propertyNames, NHibernate.Type.IType[] types)
{
//find diffs, log each change
if (entity is ILoggable && entity is NamedEntity)
{
var namedEntity = entity as NamedEntity;
for (var i = 0; i < currentState.Count(); i++)
{
if (currentState[i] != previousState[i])
{
var log = new Log()
{
Description = "update",
InDate = namedEntity.ModifiedDate.Value,
ItemId = namedEntity.Id,
ItemType = namedEntity.GetType().Name,
NewValue = currentState[i].ToString(),
OldValue = previousState[i].ToString(),
PropertyName = propertyNames[i],
UserId = namedEntity.ModifiedByUserId.Value
};
// calling save calls onflushdirty again, where entity is not log, but the same entity of the first call
ObjectFactory.GetInstance().Save(log);
}
}
}
return base.OnFlushDirty(entity, id, currentState, previousState, propertyNames, types);
}
Solution
ok, i figured it out, my problem was _logrepository.Save(log) was opening ANOTHER transaction and commiting it. So, i changed logrepository.Save(log) not to open and commit another transaction but use an open transaction.
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