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. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
