[jboss-user] [EJB3] - @PrimaryKeyJoinColumn - exception

Hubert Lyczek [http://community.jboss.org/people/lysy78] created the discussion "@PrimaryKeyJoinColumn - exception" To view the discussion, visit: http://community.jboss.org/message/581026#581026 -------------------------------------------------------------- Hello, I've dicided to try one-to-one relation using @PrimaryKeyJoinColumn. But i cannot force it to work. Environment: - AS: jboss-6.0.0.Final - java version "1.6.0_23" Problem description: I have two entities: Customer, Address. Relation between Customer and address is bidirectional one-to-one. The relation  uses primary keys. You can see created entity beans below: @Entity @Table(name="CUSTOMER") public class Customer implements Serializable{        @Id      @Column(name="CUSTOMER_ID", nullable=false)      @GeneratedValue(strategy=GenerationType.AUTO)      private Integer customerId;        ...        //bidirectional      @OneToOne(fetch=FetchType.EAGER, cascade=CascadeType.ALL, optional=true)      @PrimaryKeyJoinColumn      private Address address;       ... }   @Entity @Table(name="ADDRESS") public class Address implements Serializable{           @Id      @Column(name="ADDRESS_ID", nullable=false)      @GeneratedValue(generator="foreignGenerator")     @GenericGenerator(           name="foreignGenerator", strategy="foreign",           parameters={@Parameter(name="property", value="customer"      )})     private Integer addressId;           ...             @OneToOne(mappedBy="address", fetch=FetchType.LAZY, optional=false)      private Customer customer;      ... }   As you see i'm using @GeneratedValue and @GenericGenerator to be sure that address_id will be the same as customer_id. Unfortunately that doesn't work. I tried to run code (from remote client): Customer customer = new Customer(); ...          //set customer fields Address address = new Address();  ...          //set addres fields customer.setAddress(address);address.setCustomer(customer);      databaseManager.createCustomer(customer);     //persist This is implementation of method createCustomer. public void          entityManager.persist(customer); }   Unfortunately when i try to persist customer with address i get this exception: Exception in thread "main" javax.ejb.EJBTransactionRolledbackException: org.hibernate.id.IdentifierGenerationException: null id generated for:class hl.test.relations.entity.Address CMTTxInterceptor.java:148)      at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.handleInCallerTx(      ... I thought that i would get the same id for Address as for Customer. But i got exeption and i don't know why. Could you guys help me find out where is the reason of the exception and how to fix my code? Thank you in advance Hubert -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/581026#581026] Start a new discussion in EJB3 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]