As an example, I have something like the following structure:

create table foo (
foo_id int,
data text
primary key (foo_id)
);

create table bar (
foo_id int,
data text,
constraint bar_foo_fk foreign key (foo_id) references foo on delete no action
primary key (foo_id)
);

I can't get this to work. One doesn't inherit from the other, it's just related data

public class Foo {
private Integer id;
private String data;

@Id
public getId() {return id;}

public getData() {return data;}
}

public class Bar {
private Foo foo;
private String data;

public getFoo() {return foo;}

public getData() {return data;}
}

of course it complains about a missing @Id. But if I put an Id on getFoo() it tells me it can't determine type of Foo. What is the right way to do this?


Versions:
Hibernate Annotations 3.3.0.GA
Hibernate 3.2.6
MySQL 5.0.x
Java 6 on MS Windows
IDE is IntelliJ 8.0.1

Hello plexq, it looks like you have missing mappings.

-> You need to declare that both classes are entities with the @Entity annotation.

-> You need to use the @Table annotation to specify the name of the table of the database.

-> The @OneToOne annotation on either side of the mapping or both if you want it to have a bidirectional mapping.

-> By default the JPA annotations are looked on the property fields not on the mutator methods.

-> You may need an id generator strategy for id generation.

With all of the above you will have something like this



Regards,