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comment on many-to-many with link table section (6.3.2)

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bers

Post subject:

Posted: Fri Dec 30, 2005 7:53 am

Newbie

Joined: Thu Dec 15, 2005 6:02 am
Posts: 8

Hi all,

Just a little word to say this book is a very interesting and I give thanks to the author for it.

I've a little question concerning the code exemple in the 6.3.2 section. How should I do if I want to have a separate primary key in the CATEGORY_ITEM table.

SQL Schema :

Code:

CATEGORY_ITEM
CAT_ITEM_ID
CATEGORY_ID
ITEM_ID

Thanks in advance for your help.

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christian

Post subject:

Posted: Fri Dec 30, 2005 7:57 am

Hibernate Team

Joined: Mon Aug 25, 2003 9:11 pm
Posts: 4592
Location: Switzerland

Map it as an entity class with two many-to-one associations. Map the one-to-many collections of Category and Item if you absolutely want to, or use a query when you need this data.

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bers

Post subject:

Posted: Fri Dec 30, 2005 8:16 am

Newbie

Joined: Thu Dec 15, 2005 6:02 am
Posts: 8

In fact, I don't need to know the CAT_ITEM_ID value (that's a serial). But if I don't change any line of the exemple.
Should I be sure this works well.

I have to to work with existing tables and all link tables have this schema.

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