Composite key using Hibernate Annotations

[danalar]

Hey all,

Can someone give me a proper example for Composite key using Hibernate Annoations.

suppose

Table1 : Product { id(pk), name }
Table2 : Item { id(pk), name }

Table12 :ProductItem{id(pk) , productId(fk) , itemId(fk) }

pk - primary key
fk - foreign key

can anyone implement above define tables using hibernate annotaions

[Daniel Rijkhof]

You'll find an example here:

http://java-aap.blogspot.com/2006/04...composite.html

[debapriya]

Hi All,

I Am also trying to know , how to do mapping in hbm for a composite key.
I have two tables.From Table A we are using two columns as composite key.And that composite key is the forgen key in Table B.Please tell somebody how to do the mapping in hbm and how to write the enity


Thnx in advance
Regards
Debapriya

[EventListener]

Recently I need to define composite unique key in hibernate mapping.

The example lower is illustrating this:

<hibernate-mapping>
<class name="name.platonov.MyType" table="My_TYPE">
<id name="id" column="ID" />
<property name="name" column="NAME" />
<property name="prop1" column="PROP1" unique-key="UK_MY_TYPE" />
<property name="prop2" column="PROP2" unique-key="UK_MY_TYPE" />
</class>
</hibernate-mapping>

In this hibernate mapping prop1 and prop2 are defined as composite unique key.

[bkrakesh]

its always better to use Annotation instead of using HBM files to map the tables.. I just went through one site http://j2eereference.com , which explain this with simple example .

http://j2eereference.com/2011/01/imp...and-hibernate/

[berbatov]

Thank you !!

[dhanaiahk]

I too have similar requirement. Thanks for sharing useful links.

___________
Dhanaiah
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