Hi Roger,
can you explain ? what's in AddCar ?
On 9 mar, 15:56, Roger Kratz <[email protected]> wrote:
> myPerson.AddCar(myCar)
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of
> graphicsxp
> Sent: den 9 mars 2009 16:52
> To: nhusers
> Subject: [nhusers] issue with bi-directional one-to-many association when
> saving
>
> Hello,
>
> I have a question about bidirectional one-to-many associations. Let's
> consider we have a class Person which can hold a collection of
> entities of type Car.
>
> My mapping file for Car would have something like :
>
> <many-to-one name="PersonID" cascade="none" column="PersonID" not-
> null="true" />
>
> and my mapping file for Person would contain :
>
> <bag name="Cars" inverse="true" lazy="true" cascade="save-update">
> <key column="PersonID" />
> <one-to-many class="Car" />
> </bag>
>
> Now that implies that anytime I want to create a Car object I also
> need to do :
>
> myPerson = new Person()
> myCar.person = myPerson
>
> This is tedious and I don't want to have to do that. The problem is
> that if I set the attribute inverse to false, then when I try to save
> a Person, I get an exception because all the Car entities I've added
> to this Person have a null CarID. If I set CarID to be not-null=false,
> then there is no exception but it inserts null into my database.
>
> How can I have NHibernate to automatically set the PersonID field of
> each Car objects in my collection to the PersonID of the Person I just
> saved ?
>
> Hope this is clear enough
> Thanks
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
