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Problem with mapping a collection.

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YNight

Post subject: Problem with mapping a collection.

Posted: Thu Mar 22, 2007 10:04 am

Newbie

Joined: Tue Mar 20, 2007 11:48 am
Posts: 11

Hi,

I'm new to hibernate and got stuck with a problem. I got an Item class which holds a list of rents. The problem is that rents can be removed, but this change isn't visible in the database of course when updating the Item object. How can I implement such a thing in a good way?

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Rastas

Post subject:

Posted: Thu Mar 22, 2007 11:05 am

Newbie

Joined: Tue Aug 01, 2006 4:17 am
Posts: 8

In your mapping put cascade="all" or cascade="all-delete-orphan"

Code:

<set name="rents" cascade="all-delete-orphan">
            <key column="ITEM_ID" not-null="true" />
            <one-to-many class="RENT" />
</set>

in your java

Code:

Transaction tx = session.beginTransaction();
Item item = (Item)session.load(Item.class,new Long(YOUR_ID_HERE))
Rent rent= item.getRents().get(1);
rents.remove(rent);
tx.commit();

that should do it.[/code]

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YNight

Post subject:

Posted: Thu Mar 22, 2007 12:36 pm

Newbie

Joined: Tue Mar 20, 2007 11:48 am
Posts: 11

llright, thanks for the quick answer, I'll look at it tommorow.

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