Question

使用@EmbeddedId和Foreign键，我在使用双向一对一映射时遇到了一些麻烦。

每次执行em.find(Bkftd03,Bkftd03PK.class) y时都会获得相同的错误：

Error performing load command : org.hibernate.TypeMismatchException: 
Provided id of the wrong type for class com.ibc.gsr.entity.Bkftd03. Expected: class com.ibc.gsr.entity.Bkftd03PK, got class com.ibc.gsr.entity.Bkftd27PK

主表结构如下所示：

Entity
@Table(name="BKFTD03")
@NamedQuery(name="Bkftd03.findAll", query="SELECT b FROM Bkftd03 b")
public class Bkftd03 implements Serializable {
    private static final long serialVersionUID = 1L;

    @EmbeddedId
    private Bkftd03PK id;

    @OneToOne
    @JoinColumns({
        @JoinColumn(name="PRO_NUM_PROPUESTA", referencedColumnName="PRW_NUM_PROPUESTA", nullable=false)
    })
    private Bkftd27 bkftd27;

反向映射表：

@Entity
@Table(name="BKFTD27")
@NamedQuery(name="Bkftd27.findAll", query="SELECT b FROM Bkftd27 b")
public class Bkftd27 implements Serializable {

    @EmbeddedId
    private Bkftd27PK id;

    @OneToOne(mappedBy="bkftd27")
    private Bkftd03 bkftd03;

两个实体的PK：

@Embeddable
public class Bkftd03PK implements Serializable {
    //default serial version id, required for serializable classes.
    private static final long serialVersionUID = 1L;

    @Column(name="PRO_NUM_PROPUESTA", nullable=false, precision=12, columnDefinition="NUMBER(12,0)")
    private long proNumPropuesta;

 .....

@Embeddable
public class Bkftd27PK implements Serializable {
    //default serial version id, required for serializable classes.
    private static final long serialVersionUID = 1L;

    @Column(name="PRW_NUM_PROPUESTA",nullable=false, precision=12, columnDefinition="NUMBER(12,0)")
    private long prwNumPropuesta;

 .......

我做错了什么？

使用@EmbeddedId和Foreign键进行双向一对一映射

0 个答案: