Embeddable和EmbeddedId之间的JPA映射@ManyToOne

Question

我在Spring Boot JPA应用程序中有以下设置：

可嵌入

@Embeddable
public class LogSearchHistoryAttrPK {
    @Column(name = "SEARCH_HISTORY_ID")
    private Integer searchHistoryId;

    @Column(name = "ATTR", length = 50)
    private String attr;

    @ManyToOne
    @JoinColumn(name = "ID")
    private LogSearchHistory logSearchHistory;
    ...
}

@Repository
@Transactional
@Entity
@Table(name = "LOG_SEARCH_HISTORY_ATTR")
public class LogSearchHistoryAttr implements Serializable {
    @EmbeddedId
    private LogSearchHistoryAttrPK primaryKey;

    @Column(name = "VALUE", length = 100)
    private String value;
    ...
}

@Repository
@Transactional
@Entity
@Table(name = "LOG_SEARCH_HISTORY")
public class LogSearchHistory implements Serializable {
    @Id
    @Column(name = "ID", unique = true, nullable = false)
    private Integer id;

    @OneToMany(mappedBy = "logSearchHistory", fetch = FetchType.EAGER)
    private List<LogSearchHistoryAttr> logSearchHistoryAttrs;
    ...
}

CREATE TABLE log_search_history (
    id serial NOT NULL,
    ...
    CONSTRAINT log_search_history_pk PRIMARY KEY (id)
 );

CREATE TABLE log_search_history_attr (
    search_history_id INTEGER NOT NULL,
    attr CHARACTER VARYING(50) NOT NULL,
    value CHARACTER VARYING(100),
    CONSTRAINT log_search_history_attr_pk PRIMARY KEY (search_history_id, attr),
    CONSTRAINT log_search_history_attr_fk1 FOREIGN KEY (search_history_id) REFERENCES
        log_search_history (id)
);

原因：org.hibernate.AnnotationException：mappedBy引用了未知的目标实体属性：com.foobar.entity.logSearchHistoryAttr.logSearchHistoryAttrs中的com.foobar.entity.logSearchHistoryAttr.logSearchHistoryHistors

我不确定为什么我会得到这个错误--映射看起来是正确的（在我看来）。我的地图有什么问题？谢谢！

Answer 1

@OneToMany(mappedBy = "primaryKey.logSearchHistory", fetch = FetchType.EAGER)
private List<LogSearchHistoryAttr> logSearchHistoryAttrs;

您还需要使主键类LogSearchHistoryAttrpk可序列化。