用Java中的Hibernate连接嵌入式Id列

在我的维护实体类中，我只有类似chartDetailId的数据库。我想通过维护实体类中的这个chartDetailId获取图表实体。但在维护表中，我只有chartDetailId，我没有chartId来加入图表表。我想加入图表表，但我无法加入此表。如何从维护表连接图表表

在我的hibernate代码中，我试图通过维护表中的chartDetailId连接ChartDetail表，如下所示，但没有成功

select t from Maintenance as m
left join fetch m.chartDetailId as chartDetail

在维护类中（我尝试了带有联接列的OneToOne，但在维护表中没有图表属性，我无法联接图表列）：

在我的chartDetail类中，我有一个带有embeddedId的复合id，如下所示

@Entity
class ChartDetail{

    @EmbeddedId
    private ChartDetailPK id = new ChartDetailPK()
}

ChartDetailPK类：

@Embeddable
class ChartDetailPK implements Serializable{
 @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CHART_ID",referencedColumnName = "ID")
    Chart chart;

    @Column(name = "CHART_DETAIL_ID",nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_DET_SEQ")
    Long chartDetailId;

equals and hascode methods...
}

@Entity
class Chart{
  @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_SEQ")
    @Column(name = "ID",nullable = false)
    private Long id;

other properties and equals and hascode methods..
}

图表类：

@Embeddable
class ChartDetailPK implements Serializable{
 @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CHART_ID",referencedColumnName = "ID")
    Chart chart;

    @Column(name = "CHART_DETAIL_ID",nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_DET_SEQ")
    Long chartDetailId;

equals and hascode methods...
}

@Entity
class Chart{
  @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_SEQ")
    @Column(name = "ID",nullable = false)
    private Long id;

other properties and equals and hascode methods..
}

数据库中的我的维护表：

@Embeddable
class ChartDetailPK implements Serializable{
 @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CHART_ID",referencedColumnName = "ID")
    Chart chart;

    @Column(name = "CHART_DETAIL_ID",nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_DET_SEQ")
    Long chartDetailId;

equals and hascode methods...
}

@Entity
class Chart{
  @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_SEQ")
    @Column(name = "ID",nullable = false)
    private Long id;

other properties and equals and hascode methods..
}

沙特莱德，

数据库中的我的图表表：

@Embeddable
class ChartDetailPK implements Serializable{
 @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CHART_ID",referencedColumnName = "ID")
    Chart chart;

    @Column(name = "CHART_DETAIL_ID",nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_DET_SEQ")
    Long chartDetailId;

equals and hascode methods...
}

@Entity
class Chart{
  @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_SEQ")
    @Column(name = "ID",nullable = false)
    private Long id;

other properties and equals and hascode methods..
}

沙提德

数据库中的我的图表详细信息表：

@Embeddable
class ChartDetailPK implements Serializable{
 @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CHART_ID",referencedColumnName = "ID")
    Chart chart;

    @Column(name = "CHART_DETAIL_ID",nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_DET_SEQ")
    Long chartDetailId;

equals and hascode methods...
}

@Entity
class Chart{
  @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_SEQ")
    @Column(name = "ID",nullable = false)
    private Long id;

other properties and equals and hascode methods..
}

沙特莱德， 沙提德

我们不能不使用连接列就连接吗？我的意思是，在这种情况下，只有一个连接列，只是chartDetail而不是chart？我们可以这样做吗

项目环境：

@Embeddable
class ChartDetailPK implements Serializable{
 @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CHART_ID",referencedColumnName = "ID")
    Chart chart;

    @Column(name = "CHART_DETAIL_ID",nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_DET_SEQ")
    Long chartDetailId;

equals and hascode methods...
}

@Entity
class Chart{
  @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "CHART_SEQ")
    @Column(name = "ID",nullable = false)
    private Long id;

other properties and equals and hascode methods..
}

伯纳特4.0.1.1决赛

爪哇6