NHibernate not persisting owned objects!

.NET
1

I have just gotten a very odd error and I can’t explain, or trace it out. My forum entity maintains a list of child forums. The list is internal, and exposed as an ienumerable, along with some methods like AddChild, FindChild and RemoveChild. Now to the code:

[HttpPost, ValidateAntiForgeryToken]
public ActionResult Add(ForumAddModel model, int? forumId = null)
{
    ConsumeErrors(validationService.ValidateForumAddModel(model));
    if (!ModelState.IsValid) return View(model);
    Forum entity = new Forum(model.Title);
    entity.Sequence = model.Sequence;
    entity.Description = model.Description;
    entity.Moderated = model.Moderated;
    entity.Enabled = model.Enabled;
    entity.Visible = model.Visible;
           
    if (forumId.HasValue)
    {
        Forum parent = forumRepository.SelectById(forumId.Value);
        parent.AddForum(entity);
        forumRepository.Update(parent);
        return RedirectToAction("Detail", new { id = forumId });
    }
    else
    {
        forumRepository.Insert(entity);
        return RedirectToAction("Manager");
    }
}

I have stepped through this several times, testing values along the way. It works perfectly, so I cannot explain the error. If a parent forum id is given, forumRepository.Update(parent) runs with no errors, it just doesn’t actually save the new child to the db.

Incidentally… until I restart VS2010, the nhibernate session actually THINKS it HAS worked, and the new record shows on the page.

Say whut?

2

Heh! This always happens to me. I post an issue, then find the answer right before somebody posts a reply. Makes me feel a bit silly.

There were actually TWO issues (both now solved):

  1. I had an instance.Inverse() set where I shouldn’t have had.
  2. I forgot to wrap the Insert, Update, and Delete methods in a transaction, so nothing was ever committed!

Duh…thanks for replying though. =)

3

Hello!
Could you publish the parent.AddForum(…) and the forumRepository.Update(…) method, please? The Hibernate entity classes would be probably helpfull too…

regards!

4

NHibernate only persists objects to the database when the session is flushed which either happens via session.Flush() or when a transaction is committed :wink: