Hello Fellows, i'm a beginner, i really like to know why hibernate can not update my object.
i use load + set + commit and nothing happens
i need to update a value that is inside a composite id then, i know constraints about Relational Model.
but if you put as example in TOAD:

UPDATE cpvanchdba.oabb445t_veiculos_x_peca_jit
SET PKSV_445PECA = 'OLDPK'
WHERE PKNI_445NSEQPROG = '1318001'
and PKSV_445PECA = 'NEWPK'

it's works ok, so when i try to doing with hibernate i can't i'm using ORACLE DB, Hibernate 2.1.2 and i my project is advanced,
and i can update data but no id data.... thanks

Could you give your mapping files with the composite id and relationship.

this is the mapping:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>

<class name="com.vw.finetuning.bo.PiezasBean" table="CPVANCHDBA.OABB445T_VEICULOS_X_PECA_JIT">

<composite-id name="piezasPK" class="com.vw.finetuning.bo.PiezasPK">
<key-property name="anio" column="PKNI_445ANO" type="java.lang.String"/>
<key-property name="site" column="PKSV_445SITE_VW_SEQ" type="java.lang.String"/>
<key-property name="knr" column="PKNI_445NSEQPROG" type="java.lang.String"/>
<key-property name="peca" column="PKSV_445PECA" type="java.lang.String"/>
</composite-id>

<property name="forn" column="ATSV_445FORNECEDOR" type="java.lang.String"/>
<property name="data" column="ATDT_445DATA_REC_BESI"/>
<property name="uso" column="ATSV_445USO" type="java.lang.String"/>


</class>

</hibernate-mapping>

i don't need to update in cascade, because i only need modify pksv_445PECA field. thank's!

do you have other objects linked to this one by some association?

updating primarey key is not really nice but i think you don't have the choice.

Instead of load + set + commit you should try load + new instance + copyAllProperties + set the key you want to modify + save(newObj) + delete(oldObj) + commit

In my opinion it's more OO logic even if it seems a little bit complicated