更新时嵌入的AttributeOverride无法正常工作 [英] Embedded AttributeOverride on update not working

问题描述

我有一个嵌入两个ModelId类的实体，其中一个是EmbeddedId，另一个则引用了另一个实体.

@Entity
public class Report implements Serializable {

    @EmbeddedId
    private final ModelId id;

    @AttributeOverride(name = "id", column = @Column(name = "scheme_id")
    @Embedded
    private ModelId schemeId;

    public void changeScheme(ModelId schemeId) {
        this.schemeId = schemeId;
    }
}

@Embeddable
public class ModelId implements Serializable {

    private Integer id;
}

我可以插入并选择 Report，但是当我更新字段时，我得到:

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private int privateId;

:

org.eclipse.persistence.exceptions.ValidationException
Exception Description: The attribute [id] of class [mypackage.ModelId] is mapped
to a primary key column in the database. Updates are not allowed.

我将GlassFish 4.1与EclipseLink 2.5一起使用.

我遗漏了一些东西还是EclipseLink错误?

---

问题在于只有id做主键，schemeId是外键.当我将schemeId更改为关联时，它正常运行:

@ManyToOne
@JoinColumn(name = "scheme_id", referencedColumnName = "id")
private Scheme scheme;

public void changeScheme(Scheme scheme) {
    this.scheme = scheme;
}

我已经在使用多种注释组合进行了测试，并且在GF4.0和EclipseLink 2.6中进行了测试，结果相同.

似乎EclipseLink在更新过程中忽略了@AttributeOverride，并将内部schemeId.id与id.id混合在一起.

解决方案

我们遇到了同样的问题.看来该缺陷已被eclipselink的现有错误所覆盖(相对于2.6.0版，我仍然在2.6.3中看到此问题):

https://bugs.eclipse.org/bugs/show_bug.cgi ?id = 477638

似乎还没有任何活动，因此与此同时，我将@EmbeddedId更改为@Embedded并添加了一个私钥，如下所示:

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private int privateId;

我还为以前属于主键的属性添加了一个复合唯一约束.我还必须更改EntityManager.find(dataType, id)调用来进行查询.我希望这会有所帮助.

I have entity with embedded two ModelId classes, where one is EmbeddedId and the other references another entity.

@Entity
public class Report implements Serializable {

    @EmbeddedId
    private final ModelId id;

    @AttributeOverride(name = "id", column = @Column(name = "scheme_id")
    @Embedded
    private ModelId schemeId;

    public void changeScheme(ModelId schemeId) {
        this.schemeId = schemeId;
    }
}

@Embeddable
public class ModelId implements Serializable {

    private Integer id;
}

I can insert and select Report but when I update the field schemeId I get:

org.eclipse.persistence.exceptions.ValidationException
Exception Description: The attribute [id] of class [mypackage.ModelId] is mapped
to a primary key column in the database. Updates are not allowed.

I use GlassFish 4.1 with EclipseLink 2.5.

Am I missing something or is it EclipseLink bug?

---

The problem is that only id makes primary key, schemeId is foreign key. When I change schemeId to association it works fine:

@ManyToOne
@JoinColumn(name = "scheme_id", referencedColumnName = "id")
private Scheme scheme;

public void changeScheme(Scheme scheme) {
    this.scheme = scheme;
}

I've been testing with many annotation combinations and also in GF4.0 and EclipseLink 2.6 with same result.

It seems like EclipseLink is ignoring @AttributeOverride during update and is mixing inner schemeId.id with id.id.

解决方案

We had the same issue. It would appear that this defect is covered by an existing bug for eclipselink (against version 2.6.0, I still see this issue in 2.6.3):

https://bugs.eclipse.org/bugs/show_bug.cgi?id=477638

It doesn't appear that there is any activity on this yet, so in the meantime I changed the @EmbeddedId to be just @Embedded and added a private primary key instead, like so:

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private int privateId;

I also added a composite unique constraint for the properties that were formerly part of the primary key. I had to change my EntityManager.find(dataType, id) calls as well to do a query instead. I hope this helps.

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