java - Eclipselink 验证异常

Question

我正在尝试调整我的数据模型以使用 BaseEntity 基类。下面的代码代表了总体思路:

    @MappedSuperclass
    public abstract class BaseEntity implements HasAuditInfo {
        @Id
        @GeneratedValue
        private Long id;
        @Column(unique = true, nullable = false)
        private String uuid;
        private Long createdById;
        @Temporal(value = TemporalType.TIMESTAMP)
        @Column(nullable = false)
        private Date createdOn;
        private Long changedById;
        @Temporal(value = TemporalType.TIMESTAMP)
        @Column(nullable = false)
        private Date changedOn;
        @Column(nullable = false)
        private Long changedOnValue;
        private Boolean active;
        private Long deactivatedById;
        @Temporal(value = TemporalType.TIMESTAMP)
        private Date deactivatedOn;
        @NotNull
        @DecimalMin("0")
        private Integer version = 0;
        private Long domainId;

        [... Getters/Setters etc ...]
}

以下是派生实体的示例:

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class Address extends BaseEntity implements Serializable, Comparable<Address> {
    private static final long serialVersionUID = 6301090657382674578L;
    // Address Fields
    @NotBlank(message = "Address Line 1 is a mandatory field.")
    private String addressLine1;
    private String addressLine2;
    private String country;
    @NotBlank(message = "Region is a mandatory field.")
    private String region;
    @NotBlank(message = "City is a mandatory field.")
    private String city;
    @NotBlank(message = "Zipcode is a mandatory field.")
    private String zipcode;

    [... Getters/Setters etc ...]
}

如果我正确理解 JPA 文档，这应该是完全有效的，但是在部署我的代码时，我从 EclipseLink 收到以下错误:

Entity class [class com.x.y.z.Address] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass. If you have defined PK using any of these annotations then make sure that you do not have mixed access-type (both fields and properties annotated) in your entity class hierarchy.

我已经尝试了一些方法来解决这个问题:

• 升级到 EclipseLink 2.3(我目前使用的是 2.2)
• 使 BaseEntity 成为非抽象的
• 将@Id 注释和字段直接移动到地址
• 注释 getId() 方法而不是 BaseEntity 和 Address 中的字段。

除了将我的代码迁移到 Hibernate(或其他一些更好的 JPA 实现)之外，这些方法都没有任何效果，我能做些什么吗？

Answer 1

解决方法是显式命名BaseEntity中的每一列，如下:

@MappedSuperclass
public abstract class BaseEntity {
       @Id
       @GeneratedValue
       @Column(name = "id")
       @SearchableId
       protected Long id;
       @Column(name = "uuid", unique = true, nullable = false)
       protected String uuid;
       @Column(name = "createdById")
       protected Long createdById;
       @Temporal(value = TemporalType.TIMESTAMP)
       @Column(name = "createdOn", nullable = false)
       protected Date createdOn;
       @Column(name = "changedById")
       protected Long changedById;
       @Temporal(value = TemporalType.TIMESTAMP)
       @Column(name = "changedOn", nullable = false)
       protected Date changedOn;
       @Column(name = "changedOnValue", nullable = false)
       protected Long changedOnValue;
       @Column(name = "active")
       protected Boolean active;
       @Column(name = "deactivatedById")
       protected Long deactivatedById;
       @Temporal(value = TemporalType.TIMESTAMP)
       @Column(name = "deactivatedOn")
       protected Date deactivatedOn;
       @Version
       @Column(name = "version")
       protected Integer version = 0;
       @Column(name = "domainId")
       protected Long domainId;