Spring data jpa spring数据@ManyToOne@MapsId

有人能帮我正确地映射这3个实体吗，因为我已经尝试了许多解决方案，但都不起作用。 我有3个实体： 应按以下方式映射的产品、项目和包装：

产品实体 项目实体

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Remove@primarykeyjoincolumn我已经尝试过了，但不起作用。在OneToMany映射包列表中，有一个mappedBy=“item”丢失。您找到答案了吗？？但EclipseLink 2.7.7仍然存在这个问题。。

public class Product implements Serializable {
    @OneToMany(mappedBy="parentProduct", cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
    @PrimaryKeyJoinColumn
    private List<Pack> packListParent;

    @OneToMany(mappedBy="childProduct", cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
    @PrimaryKeyJoinColumn
    private List<Pack> packListChild;
 } 

public class Pack implements Serializable {
    @EmbeddedId
    protected PackPK PackPK;

    @MapsId("itemId")
    @JoinColumn(name = "item_id", referencedColumnName = "item_id", insertable = true, updatable = true)
    @ManyToOne(fetch = FetchType.LAZY)
    private Item item;

    @MapsId("parentProductId")
    @JoinColumn(name = "product_id", referencedColumnName = "product_id", insertable = true, updatable = true)
    @ManyToOne(fetch = FetchType.LAZY)
    private Product parentProduct;

    @MapsId("childProductId")
    @JoinColumn(name = "child_product_id", referencedColumnName = "product_id", insertable = true, updatable = true)
    @ManyToOne(fetch = FetchType.LAZY)
    private Product childProduct;           
}

@Embeddable
public class PackPK implements Serializable {
    @Basic(optional = false)
    @Column(name = "product_id")
    private Long parentProductId;

    @Basic(optional = false)
    @Column(name = "item_id")
    private Long itemId;

    @Basic(optional = false)
    @Column(name = "child_product_id")
    private Long childProductId;
}

public class Item implements Serializable {
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
    @PrimaryKeyJoinColumn
    private List<Pack> PackList;
}

WARN  - [AnnotationConfigServletWebServerApplicationContext] 
Exception encountered during context initialization - cancelling refresh attempt: 
org.springframework.beans.factory.UnsatisfiedDependencyException: 
Error creating bean with name 'produitService': Unsatisfied dependency expressed through field 'PackService'; 
nested exception is org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'PackService': Invocation of init method failed; 
nested exception is java.lang.IllegalArgumentException: Expected id attribute type [class com.project.jpa.domain.PackPK] 
on the existing id attribute [SingularAttributeImpl[EntityTypeImpl@1851998201:Item 
[ javaType: class com.project.jpa.domain.Item descriptor: RelationalDescriptor(com.project.jpa.domain.Item --> [DatabaseTable(item)]), mappings: 47],
org.eclipse.persistence.mappings.ManyToOneMapping[item]]] on the identifiable type [EntityTypeImpl@1341697553:Pack [ javaType: class com.project.jpa.domain.Pack descriptor: 
RelationalDescriptor(com.project.jpa.domain.Pack --> [DatabaseTable(pack_svod_content)]), mappings: 6]] but found attribute type [class com.project.jpa.domain.Item].