I’m mapping two entities 1:n where the many-side has a composite primary key. So far so good.

But when I embed one of the keys attributes in an object, hibernate shows me an error that it cannot find the field of the embedded object:

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1784)
    ... 38 more
Caused by: java.lang.IllegalStateException: PostInitCallback queue could not be processed...
        - PostInitCallbackEntry - VirtualIdEmbeddable(com.example.contract.Partner#{id})#finishInitialization
        - PostInitCallbackEntry - EmbeddableMappingType(com.example.contract.Partner)#finishInitialization

    at org.hibernate.metamodel.mapping.internal.MappingModelCreationProcess.executePostInitCallbacks(MappingModelCreationProcess.java:144)
    ... 42 more
    Suppressed: org.hibernate.PropertyNotFoundException: Could not locate field name [personNumber] on class [com.example.contract.Partner]
        at org.hibernate.internal.util.ReflectHelper.findField(ReflectHelper.java:456)
        ...
    Suppressed: org.hibernate.PropertyNotFoundException: Could not locate field name [personNumber] on class [com.example.contract.Partner]
        at org.hibernate.internal.util.ReflectHelper.findField(ReflectHelper.java:456)
        ...

Can anybody explain what’s going on here and how I can make it work?

These are my annotated classes:

@Entity
public class Contract {
    @Id
    private Integer id;
    private String something;
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinColumn(name = "contractId")
    private final List<Partner> partners = new ArrayList<>();
}

@Entity
@IdClass(PartnerId.class)
public class Partner {

    @Id private Integer contractId;
    @Id private Person person;

    private String role;
}

@Data
public class PartnerId {
    private Integer contractId;
    @Embedded
    private Person person;
}

@Embeddable
public class Person {
    private Integer personNumber;
}