Those are all possibilities ... with AOP the problem is finding the root (it might be 5 levels deep). I was looking at Peter's suggestion but don't like what it requires. I am currently looking at a way to do this only in proxies but the trick is in finding out what aggregate root we are under while not having the id carried by the domain objects ... One thing I see is having the IHaveParentId be implemented by the proxy ... then have an IAggregateRoot for the actual parent ... so you can just keep walking up the path but none fo the objects carry the ids themselves. As I go through this though I keep hearing "too much magic" being whispered in my ear.
Greg On Mon, Apr 27, 2009 at 11:17 AM, Sidar Ok <sida...@gmail.com> wrote: > Isn't this a good candidate for AOP ? So when a child entity's version is > updated, whether by NH or externally, you go and update the aggregate > root(s) too. > > If you see this as a business decision, and don't want to put it in AOP, may > be an event driven solution would do ? Child publishes HeyIHaveBeenUpdated > event and have aggregates subscribe to it. > > Am I thinking too simple and missing something ? > > On Mon, Apr 27, 2009 at 4:51 PM, Greg Young <gregoryyou...@gmail.com> wrote: >> >> Yeah that's about what I thought ... it gets ugly also when you start >> going n levels deep and end up having to walk bunches of >> bi-directional relationships. This is something that really needs to >> be a first class concept to work without being too complex. >> >> I was hoping some people had some brilliant solution that had just alluded >> me :( >> >> makes me curious though how exactly so many people are doing "DDD" >> with nhibernate? I am suspecting more and more that these people are >> in fact not doing DDD at all but instead are doing "DDD as a pattern >> language". you can force everything through the aggregate and touch >> its version but yuck! >> >> Cheers, >> >> Greg >> >> On Fri, Apr 24, 2009 at 4:00 AM, Peter Morris <mrpmor...@gmail.com> wrote: >> > >> >> >> > I see what you are saying .... build an interceptor ... then make my >> > root traversable from all thechildren .. have interceptor make the >> > session.Update call .. Is that correct? >> > < >> > >> > It's the way I have done it in ECO (capableobjects), I make each part >> > implement IAggregatePart which has a GetRootObject I can call to ensure >> > the >> > root is updated too. >> > >> > If you are using Created/Modified etc on a Repository rather than using >> > it >> > only as a query mechanism then the repository can do that for you, >> > because >> > the only way to call Update to save the child is to go via that >> > Repository. >> > >> > >> > Pete >> > ==== >> > http://mrpmorris.blogspot.com >> > http://www.AlterEgos.com - Who do you want to be? >> > >> > >> > > >> > >> >> >> >> -- >> It is the mark of an educated mind to be able to entertain a thought >> without accepting it. >> >> > > > > -- > Sidar Ok > > http://www.sidarok.com > http://www.twitter.com/sidarok > > > > > -- It is the mark of an educated mind to be able to entertain a thought without accepting it. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to nhusers@googlegroups.com To unsubscribe from this group, send email to nhusers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
