JPA / Hibernate OneToMany Mapping, using a composite PrimaryKey

Question

I\'m currently struggling with the right mapping annotations for a scenario using a composite Primary Key Class. First, what I am trying to achieve in words:

I have

Answer 1

I've fixed a similar problem by modifying the mappedBy attribute of the parent class (using dotted notation)

public class Group{
    ...
    @OneToMany(mappedBy = "fieldAccessRulePK.group")
    private Set fieldAccessRules;
    ... 
}

and by keeping the annotations in the PK class:

@Embeddable
public class FieldAccessRulePK implements Serializable{
    private String fieldKey;

    @ManyToOne
    @JoinColumn(name = "group_id")
    private Group group;
    ...
}