Thanks 2010/3/12 DanPlaskon <[email protected]>
> Fabio, > > I believe the example I posted was meant for database deployments > where database-level cascade deletes aren't an option - I was already > aware of the "on-cascade='delete'" option for the inverse side of sets > when it is. > > I've opened an initial ticket in JIRA - I'll see what I can do about > putting together some example code in the next few days (currently > swamped here at work). > > Cheers, > > -Dan > > On Mar 12, 11:39 am, Fabio Maulo <[email protected]> wrote: > > well... what can I say ?.... > > If you are a ConfORM user you will see which is the mapping pattern for a > > bidirectional-one-to-many with *one-shot-delete* : > > public class Item > > { > > private ISet<Bid> _bids; > > public long Id { get; private set; } > > public ISet<Bid> Bids > > { > > get { return _bids; } > > > > } > > } > > > > public class Bid > > { > > public long Id { get; private set; } > > public Item Item { get; set; } > > public Double Amount { get; private set; } > > public string Code { get; private set; } > > > > } > > > > The whole mapping in ConfORM is : > > public void MapDomain(ObjectRelationalMapper orm) > > { > > orm.TablePerClass(new[] { typeof(Item), typeof(Bid) }); > > orm.Patterns.PoidStrategies.Add(new NativePoidPattern()); > > > > } > > > > *Yes! only two lines!* > > > > And the result XML is (for those about to rock) : > > <class name="Item"> > > <id name="Id" type="Int64"> > > <generator class="native" /> > > </id> > > <set name="Bids" access="nosetter.camelcase-underscore" > inverse="true" > > cascade="all,delete-orphan"> > > <key column="Item" on-delete="cascade" /> > > <one-to-many class="Bid" /> > > </set> > > </class> > > <class name="Bid"> > > <id name="Id" type="Int64"> > > <generator class="native" /> > > </id> > > <many-to-one name="Item" /> > > <property name="Amount" /> > > <property name="Code" /> > > </class> > > > > As you can see ConfORM knows how map the *one-shot-delete* : > > <set name="Bids" access="nosetter.camelcase-underscore" > inverse="true" > > cascade="all,delete-orphan"> > > <key column="Item" on-delete="cascade" /> > > <one-to-many class="Bid" /> > > </set> > > > > btw... backing to our concern if you have time to create a test to pass > and > > a JIRA ticket we can study a solution. > > > > 2010/3/12 DanPlaskon <[email protected]> > > > > > > > > > > > > > Fabio, > > > > > Alright - I see what you're getting at...something like this: > > > > >http://elegantcode.com/2009/07/19/nhibernate-2-1-and-collection-event. > .. > > > (but obviously handing validation events) > > > > > Also...wouldn't we be interested in > > > > > IPreCollectionUpdateEventListener > > > IPreCollectionRemoveEventListener > > > > > Instead of the "Post" ones? > > > > > I imagine these would need to examine only "Size" and "NotNull" > > > validation attributes on collections, to ensure that the contraints > > > specified were satisfied. > > > > > Is this along the lines of what you were thinking? > > > > > On Mar 12, 10:55 am, Fabio Maulo <[email protected]> wrote: > > > > More than a workaroud we should think about a solution > > > > IPostCollectionUpdateEventListener > > > > IPostCollectionRemoveEventListener > > > > > > Can you study it a little bit and send me a proposal ? > > > > > > If you have time obviously. > > > > > > btw a JIRA ticket is welcomehttp://216.121.112.228/browse/NHV > > > > > > 2010/3/12 DanPlaskon <[email protected]> > > > > > > > Hello, > > > > > > > I have a "Size" validation constraint specified for a collection on > an > > > > > entity of mine (Min is set to 1, to specify that the entity must > have > > > > > at least one child entity in its collection). > > > > > > > This works as expected for the initial creation, however validation > > > > > does not occur upon update of the entity if the only change made to > it > > > > > is to remove all child entities from the collection. I imagine this > > > > > occurs because the entity itself is not considered dirty (since the > > > > > only changes made were to its collection of child entities), and > thus > > > > > the ValidatePreUpdateEventListener does not evaluate it at all. > > > > > However, this poses a problem, because the entity has technically > > > > > entered an invalid state (its collection does not contain any child > > > > > entities) and NHibernate is all to happy to remove all child > entities > > > > > without checking the validity of the parent. > > > > > > > So...that being said...what's the workaround for this? If further > > > > > details are required, please don't hesitate to ask :) > > > > > > > -- > > > > > 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]<nhusers%[email protected]> > <nhusers%[email protected]<nhusers%[email protected]> > > > > > <nhusers%[email protected]<nhusers%[email protected]> > <nhusers%252bunsubscr...@googlegroups.com> > > > > > > > > > . > > > > > For more options, visit this group at > > > > >http://groups.google.com/group/nhusers?hl=en. > > > > > > -- > > > > Fabio Maulo- Hide quoted text - > > > > > > - Show quoted text - > > > > > -- > > > 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]<nhusers%[email protected]> > <nhusers%[email protected]<nhusers%[email protected]> > > > > > . > > > For more options, visit this group at > > >http://groups.google.com/group/nhusers?hl=en. > > > > -- > > Fabio Maulo- Hide quoted text - > > > > - Show quoted text - > > -- > 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]<nhusers%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > > -- 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.
