Re: Hibernate foreign key as primary key

From:
Robert Klemme <shortcutter@googlemail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 07 Aug 2011 19:14:52 +0200
Message-ID:
<9a7vglFa7hU1@mid.individual.net>
On 07.08.2011 18:45, Frank Langelage wrote:

On 07.08.11 13:38, Lionel wrote:

This may be a little off topic but I'm sure there are some experts in
here.

I'm having some troubles getting using a foreign key as a primary key.
In this post I will use the most simple issue I'm having trouble with.

Here's some snippets (pharmacy project):

public abstract class AbstractDrugModel
{
private String name;
private IntravascularDrug ivDrug;
}

public class IntravascularDrug
{
private AbstractDrugModel drug;
}


I can't help you with your problem but want to give a comment to this mail.
Your class design does not make sense to me. You have a circular
reference between these two classes. Java allows this, but this is bad
design in my eyes.


.... but very common for bidirectional relationships. If instances of
both classes need to be able to navigate the relationship that design is
the most efficient solution.

And this might be the cause that hibernate cannot work with this design.


Yes, might be.

Kind regards

    robert

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