LOL On Fri, Dec 19, 2008 at 7:45 AM, Fabio Maulo <[email protected]> wrote:
> epitka... we have another concept....Who are using your class is your > friend and he is not a terrorist. > > 2008/12/19 epitka <[email protected]> > > >> But how do you protect your collection from being changed; exposing it >> as read-only? But that is not intuitive, if client does not know that >> AddPerson is to be used you would get exception. >> Why is #2 not viable? >> >> On Dec 18, 9:29 pm, "Greg Young" <[email protected]> wrote: >> > 1. don't let collection be modified directly but use Add/remove and >> > enforce rule there >> > >> > Have the aggregate root enforce the validation. >> > >> > Cheers, >> > >> > Greg >> > >> > >> > >> > On Thu, Dec 18, 2008 at 7:25 PM, epitka <[email protected]> wrote: >> > >> > > This is probably more a DDD question then NH. Let say you have >> > > observable collections that raise events before collection gets >> > > changed and after. Let's say you have a rule that only person's over >> > > 21 can be added to the collection. How would you handle this rule: >> > > 1. don't let collection be modified directly but use Add/remove and >> > > enforce rule there >> > > 2. create delegate that will check rule in OnChanging step and veto >> > > change >> > > 3. allow person to be added and run validate before persisting entity >> > > using NH events, basically allow entity to get into invalid state >> > > 4. manually invoke validation before commiting changes. >> > > 5. something else ? >> > >> > -- >> > It is the mark of an educated mind to be able to entertain a thought >> > without accepting it. >> >> > > > -- > Fabio Maulo > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
