It starts on the database level. How can one record be added when the
other is not inserted yet? There is a chicken/egg problem here that
NHibernate cannot solve for you. It would result in referential
integrety problems when only one record would got inserted.


On 27 apr, 22:56, nicklang <[email protected]> wrote:
> Also, here are the Fluent NHibernate mappings:
>
> public class Tester1Map : ClassMap<Tester1>
> {
>     public Tester1Map()
>     {
>         Id(x => x.Tester1Id)
>             .GeneratedBy.GuidComb();
>         Map(x => x.Name);
>         References<Tester2>(x => x.Tester2)
>             .Column("Tester2Id")
>             .Cascade.SaveUpdate()
>             .Not.Nullable();
>     }
>
> }
>
> public class Tester2Map : ClassMap<Tester2>
> {
>     public Tester2Map()
>     {
>         Id(x => x.Tester2Id)
>             .GeneratedBy.GuidComb();
>         Map(x => x.Name);
>         References<Tester1>(x => x.Tester1)
>             .Column("Tester1Id")
>             .Cascade.SaveUpdate()
>             .Not.Nullable();
>     }
>
> }
>
> Thanks for any inside you may have!
>
> On Apr 27, 4:36 pm, nicklang <[email protected]> wrote:
>
>
>
>
>
> > Hi,
>
> > I have 2 entities, each referencing each other (cyclical dependency)
> > via many-to-one relationships (I'm using FluentNHibernate so they are
> > actually References calls)
>
> > Now what I'm trying to do is:
>
> > Tester1 tester1 = new Tester1();
> > tester1.Name = "the tester1";
>
> > Tester2 tester2 = new Tester2();
> > tester2.Name = "the tester2";
>
> > tester1.Tester2 = tester2;
> > tester2.Tester1 = tester1;
>
> > session.Save(tester1);
>
> > The error I keep getting is on the last line:
>
> > NHibernate.PropertyValueException: not-null property references a null
> > or transient value DataTransfer.Tester.Tester2.
>
> > I'm using Guid.Comb for my Ids.
>
> > I thought NHibernate worked out these details - I'm clearly missing a
> > big piece of the puzzle!
>
> > Any ideas why this doesn't work?
>
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