Question

我使用postgres数据库，我有ManyToOne实体与约定和组织有convention_id关系，我想创建3个主键organization_id，GeneratedValue id和@Entity @Table(name = "conventionnement") public class Conventionnement implements Serializable { private static final long serialVersionUID = 1L; @EmbeddedId private ConventionnementIdentity conventionnementIdentity; @MapsId("convention_id") @ManyToOne private Convention convention; @MapsId("organization_id") @ManyToOne private Organization organization; //getter and setter } @Embeddable public class ConventionnementIdentity implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator") @SequenceGenerator(name = "sequenceGenerator") private Long id; @Column(name = "convention_id", insertable = false, updatable = false) private Long conventionId; @Column(name = "organization_id", insertable = false, updatable = false) private Long organizationId; //getter and setter }，我使用@Embeddable，如下例所示，但我有以下错误

引起：org.hibernate.annotations.common.AssertionFailure：在继承状态层次结构中找不到声明类： ConventionnementIdentity

当我在Conventionnement类中移动id时出现此错误

当用作a时，ConventionnementIdentity不得具有@Id属性 @EmbeddedId

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Answer 1

您已经定义了@EmbeddedId，但在其中您声明了另一个@Id，因此错误。将生成的ID指向表格中正确的id列（下面我假设＆＃34; id＆＃34;作为列名称）：

@Embeddable
public class ConventionnementIdentity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Column(name = "id", nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
    @SequenceGenerator(name = "sequenceGenerator", sequenceName="YOUR_DB_SEQ", allocationSize=1)
    private Long id;

    @Column(name = "convention_id", insertable = false, updatable = false)
    private Long conventionId;

    @Column(name = "organization_id", insertable = false, updatable = false)
    private Long organizationId;

    //getter and setter
}

具有@EmbeddedId，@ GeneratedValue和@ManyToOne的实体

1 个答案: