collection manipulation

dia100 · **Joined:** Mon Sep 08, 2003 4:30 pm **Posts:** 203

Hi All,

If I have a one to many from object A to object B, but A does _not_ control the lifecycle of B, which is the proper way to implement the mapping and the java code for adding/removing B elements to/from A?

I am particulary having problems for removing a B from the collection referenced by A.

If I do A.getB().remove(objB) it will not change anything only if the B is mapped with delete-orphan, but then the B would be deleted from the DB which is not desirable.

Please advice,

--steve p.

emmanuel · **Posted:** Wed Mar 03, 2004 9:28 pm

Is it a bidir ?
Just do b.setA(null);
and remove delete-orphan

Not a bidir ?
Read http://www.hibernate.org/155.html, you've probably misunderstood the inverse="true" usage

dia100 · **Joined:** Mon Sep 08, 2003 4:30 pm **Posts:** 203

Quote:

Not a bidir ?
Read http://www.hibernate.org/155.html, you've probably misunderstood the inverse="true" usage

It's not a bidir. I read the article but couldn't find an example for my case. Please advice on how to solve my problem if it is _not_ a bidir.

Thanks really much,

--steve p.

emmanuel · **Posted:** Wed Mar 03, 2004 9:47 pm

Then
inverse="false"
cascade="save-update" or "none"
a.getBs().remove(objB);

dia100 · **Joined:** Mon Sep 08, 2003 4:30 pm **Posts:** 203

Thank you for the prompt reply!

Best regards.

dia100 · **Joined:** Mon Sep 08, 2003 4:30 pm **Posts:** 203

emmanuel wrote:

Then
inverse="false"
cascade="save-update" or "none"
a.getBs().remove(objB);

One more question, please:

If I do

a.getBs().clear()

will this clear all references from A to B?

'Cause I believe it didn't work when I tried it.

thx [again].