blah!!! composite-id brrrrrrrrrrrrrrrrrrrr On Mon, Apr 25, 2011 at 11:57 AM, Øyvind Valland <[email protected]>wrote:
> For anyone who's interested, I got a solution for this with some help from > the guys on SO - > http://stackoverflow.com/questions/5728741/preventing-delete-insert-when-modifying-many-to-many-relationship-with-nhibernate > . > > Fabio's (very good) suggestion of using an IdBag would have done the trick > - but I didn't want to mix FluentNH with HBM, so I chose to map another > component with a composite id. > > > On 22 April 2011 18:13, Øyvind <[email protected]> wrote: > >> Hello, >> >> I still haven't been able to figure out why this happens. I anyone >> able to offer any pointers? Any help would be much appreciated. Or >> please just tell me if my question is too difficult or too stupid. >> >> Thank you, >> Øyvind >> >> On Apr 20, 1:02 pm, Øyvind <[email protected]> wrote: >> > Hello, >> > >> > I've got a user and a place entity, and a relationship mapped between >> > them using a 'UserPlace' entity (A user can belong to many places). >> > The mapping, with FluentNH, is below. This works fine, but I've >> > noticed that every time I modify a User's UserPlace (setting a place >> > as default or selected) the entire collection of UserPlace is first >> > deleted from the database, and then reinserted. I assume it's because >> > NHibernate doesn't know enough about what distinguishes one row from >> > another, so how can I change my mapping to prevent a complete deletion >> > and re-insertion of all rows? >> > >> > public class UserMap : ClassMap<User> >> > { >> > HasMany(x => x.Neighbourhood) >> > .Component(c => >> > { >> > c.Map(x => x.IsDefault).Not.Nullable(); >> > c.Map(x => x.Selected).Not.Nullable().Default("0"); >> > c.References(x => x.Place).Fetch.Join(); >> > } >> > ).Not.LazyLoad().Cascade.SaveUpdate(); >> > >> > >> > >> > >> > >> > >> > >> > } >> >> -- >> 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. >> >> > > > -- > Visit my blog at http://www.babel-lutefisk.net > > -- > 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. > -- 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.
