JPA：只有一个来自组合键的外键

我很难在JPA2/Hibernate中使用复合主键和外键。我试图用a和B创建一个简单的场景：

CREATE TABLE Customer(
    customer_id uuid,
    employee_id int,
    created_at timestamp with time zone DEFAULT now(),
    
    CONSTRAINT customer_id_employee_id_pkey PRIMARY KEY (customer_id, employee_id),
    CONSTRAINT fk_owner_owner_id FOREIGN KEY (customer_id)
        REFERENCES public.owner (id) MATCH SIMPLE
        ON UPDATE CASCADE
        ON DELETE CASCADE
)

我应该如何创建实体类

我在下面试过了

@EqualsAndHashCode
@Data
public class CustomerId implements Serializable {
    private UUID customerId;
    private Long employeeId;
}


@Data
@Entity
@IdClass(CustomerId.class)
@Table(name = "customer")
public class Customer implements Serializable {
    private static final long serialVersionUID = -234295442215152987L;

    @Id
    @Column(name = "customer_id")
    private UUID customerId;

    @Id
    @Column(name = "employee_id")
    private Long employeeId;

    @CreationTimestamp
    @Column(name = "created_at", insertable = false, updatable = false)
    private OffsetDateTime createdAt;
}

但是我不确定应该在哪个类中映射customer_id，这是一个外键。

---

请帮帮我，应该是这样的

@Data
@Embeddable
public class CustomerId implements Serializable {
    private UUID customerId;
    private Long employeeId;
}


@Data
@Entity
@Table(name = "customer")
public class Customer implements Serializable {
    private static final long serialVersionUID = -234295442215152987L;

    @EmbeddedId
    @Column(name = "customer_id")
    private CustomerId customerId;


    @CreationTimestamp
    @Column(name = "created_at", insertable = false, updatable = false)
    private OffsetDateTime createdAt;
}