question about 1:1 relation

[Vincent ARBONA]

Hi,

I have an unidirectionnal 1:1 association between two objects : IndividuDTO and 
IndBacDTO


  <class-descriptor
      class="org.udb.candisup.back.dto.domain.IndividuDTO"
      table="INDIVIDU"
  >
    ....
    ....
  <field-descriptor
     name = "idBac"
     column = "cod_ind_bac"
     jdbc-type="INTEGER"
     conversion 
="org.apache.ojb.broker.accesslayer.conversions.Int2IntegerFieldConversion"
   />
  <reference-descriptor
     name = "bacIndividu"
     class-ref = "org.udb.candisup.back.dto.domain.BacIndividuDTO"
     auto-update = "true"
     auto-delete = "true" >
     <foreignkey field-ref="idBac"/>
  </reference-descriptor>
....
....
</class-descriptor>


Somewhere in my code, I do this :

IndividuDTO individu = broker.getObjectByQuery(...); //Retrieve the IndividuDTO
individu.setIdBac( 0 );
individu.setBacIndividu( null );
broker.store(individu);

I want that the old BacIndividuDTO to be deleted into the database. Do I have to 
delete it explicitelly or is there a way to delete it automatically ??

Thanks
Vincent