Hibernate embeddables: component property not found

Question

I\'m trying to use JPA @Embeddables with Hibernate. The entity and the embeddable both have a property named id:

@MappedSuperclass
         


        

Answer 1

The naming strategy configuration has changed. The new way as per the Spring Boot documentation is this:

spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyComponentPathImpl

Also, you must not use @Id within an @Embeddable. I thus created a seperate @MappedSuperclass for embeddables:

@MappedSuperclass
public abstract class A {
    @Id
    @GeneratedValue
    long id;
}

@MappedSuperclass
public abstract class E {
    @GeneratedValue
    long id;
}

@Embeddable
public class B extends E {

}

@Entity
public class C extends A {
    B b;
}

This way, the table C has two columns id and b_id. The downside is of course that A and E introduce some redundency. Comments regarding a DRY approach to this are very welcome.