NonUniqueObjectException：具有相同标识符值的不同对象已与会话相关联

Question

我的两个 bean 中有以下映射

父 Bean

@OneToMany(fetch = FetchType.LAZY, mappedBy = "application")
@Cascade({CascadeType.SAVE_UPDATE, CascadeType.DELETE})
@JsonIgnore
private Set<ApplicationBuildVO> applicationBuilds = new HashSet<ApplicationBuildVO>(0);

童豆

@ManyToOne(fetch = FetchType.LAZY)
@Cascade({CascadeType.SAVE_UPDATE})
@JoinColumn(name = "APPLICATION_ID", nullable = false)
@JsonIgnore
private ApplicationVO application;

在我的服务方法中 - 我在应用程序 bean 上执行查找创建一个子应用程序 bean - 它具有对父应用程序的引用

然后 - 当我尝试在同一服务方法中更新父 bean 上的值时，出现以下错误

Caused by: org.hibernate.NonUniqueObjectException: A different object with the same identifier value was already associated with the session : [com.domain.dao.ApplicationVO#1]
    at org.hibernate.engine.internal.StatefulPersistenceContext.checkUniqueness(StatefulPersistenceContext.java:617)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:301)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:244)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:109)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)

我的服务代码（精简）如下

public boolean performBuild(Integer applicationId) {
        ApplicationVO applicationVO = applicationServices.findAnyApplicationId(applicationId);

        ApplicationBuildVO androidApplicationBuildVO = new ApplicationBuildVO();
        androidApplicationBuildVO.setIsAndroid(true);
        androidApplicationBuildVO.setIsSuccess(appBuildSuccessful);
        androidApplicationBuildVO.setApplication(applicationVO);
        androidApplicationBuildVO.setSoftwareVersion(androidSoftwareVersionVO);
        androidApplicationBuildVO.setS3BucketName(mobileAppsBucketName);
        androidApplicationBuildVO.setS3ArtifactKey(androidArtifact);

        Integer applicationBuildId = applicationBuildServices.saveApplicationBuild(androidApplicationBuildVO);

        applicationVO.setIsCurrentlyBeingBuilt(false);
        boolean updateApplicationResult = applicationServices.updateApplication(applicationVO);          
}

有什么办法可以解决这个问题吗？

Answer 1

我认为你的问题是因为你先保存 androidApplicationBuildVO child 然后保存 parent applicationVO 你可以添加 child 到 parent 并像这样保存 parent：

boolean performBuild(Integer applicationId) {
    ApplicationVO applicationVO = applicationServices.findAnyApplicationId(applicationId);

    ApplicationBuildVO androidApplicationBuildVO = new ApplicationBuildVO();
    androidApplicationBuildVO.setIsAndroid(true);
    androidApplicationBuildVO.setIsSuccess(appBuildSuccessful);
    androidApplicationBuildVO.setApplication(applicationVO);
    androidApplicationBuildVO.setSoftwareVersion(androidSoftwareVersionVO);
    androidApplicationBuildVO.setS3BucketName(mobileAppsBucketName);
    androidApplicationBuildVO.setS3ArtifactKey(androidArtifact);

    applicationVO.addBuild(androidApplicationBuildVO);

    applicationVO.setIsCurrentlyBeingBuilt(false);
    boolean updateApplicationResult = applicationServices.updateApplication(applicationVO);          
     }

如果 applicationVO

中不存在此方法，则应添加此方法

public void addBuild(ApplicationBuildVO buildVo) {
    applicationBuilds.add(buildVo);
}

注意 equals 和 hashcode ApplicationBuildVO 中的实现不要基于 id 添加未保存的元素时不会有意外 applicationBuilds 设置。

NonUniqueObjectException：具有相同标识符值的不同对象已与会话相关联

NonUniqueObjectException: A different object with the same identifier value was already associated with the session

java

hibernate

hibernate-mapping