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Re: Hibernate foreign key as primary key

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From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Hibernate foreign key as primary key
Date	Sun, 07 Aug 2011 19:14:52 +0200
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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

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Thread

Hibernate foreign key as primary key Lionel <lionelv@none.com> - 2011-08-07 21:38 +1000
  Re: Hibernate foreign key as primary key markspace <-@.> - 2011-08-07 07:07 -0700
  Re: Hibernate foreign key as primary key Robert Klemme <shortcutter@googlemail.com> - 2011-08-07 18:03 +0200
  Re: Hibernate foreign key as primary key Frank Langelage <frank@lafr.de> - 2011-08-07 18:45 +0200
    Re: Hibernate foreign key as primary key Robert Klemme <shortcutter@googlemail.com> - 2011-08-07 19:14 +0200
      Re: Hibernate foreign key as primary key Lionel <lionelv@none.com> - 2011-08-08 20:11 +1000
        Re: Hibernate foreign key as primary key Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-08-08 18:26 -0300
          Re: Hibernate foreign key as primary key Lionel <lionelv@none.com> - 2011-08-09 18:56 +1000
            Re: Hibernate foreign key as primary key Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-08-09 21:45 -0300
        Re: Hibernate foreign key as primary key Lew <lewbloch@gmail.com> - 2011-08-10 09:58 -0700

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