Question

我正在尝试调整我的数据模型以使用BaseEntity基类。以下代码代表了一般概念：

    @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，但在部署我的代码时，我从EclipseLink收到以下错误：

实体类[class com.x.y.z.Address]没有指定主键。它应该定义@ Id，@ EmbeddedId或@IdClass。如果你已经使用任何这些注释定义了PK，然后确保你没有混合访问类型（注释的字段和属性）在您的实体类层次结构中。

我尝试了一些方法来解决这个问题：

升级到EclipseLink 2.3（我目前正在使用2.2）
使BaseEntity非抽象
将@Id注释和字段直接移动到地址
在BaseEntity和Address中注释getId（）方法而不是字段。

这些方法都没有产生任何影响，没有将我的代码迁移到Hibernate（或其他一些更好的JPA实现），我能做些什么吗？

Answer 1

解决方案是在BaseEntity中明确命名每一列，如下所示：

@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;

Answer 2

你不应该得到这个错误。如果你将@Id移动到地址中，绝对不会。

您确定在进行更改后重新编译/部署了代码吗？

如果删除TABLE_PER_CLASS继承，它是否有效？（Address有子类吗？）

Eclipselink ValidationException

2 个答案: