相关疑难解决方法(0)

在我的应用程序中,一个hibernate操作就像这样.应用程序使用请求中的新值更新父实体,并删除所有现有(先前插入的)子实体并插入新的子记录.

我正在使用冬眠DELETE_ORPHAN,如下所示.

当我这样做时,我得到以下异常:

org.hibernate.HibernateException:拥有实体实例不再引用cascade ="all-delete-orphan"的集合:com.childs

我看到了与问题类似的线程,我试图在这些线程中应用解决方案.但那没用

我的父实体

    public class Parent implements Serializable {

            @Column(name = "PARENT_ID")
            @Basic(fetch = FetchType.EAGER)
            @Id
            @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq")
            @SequenceGenerator(name = "seq", sequenceName = "seq")
            private Integer parentId;  //primary key of parent

            ....... 
            ........

            //mapping to child entity
            @OneToMany(mappedBy = "parent", cascade = { CascadeType.ALL }, fetch =  FetchType.LAZY)
            @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
            private Set<Child> childs;

            ................
            ...............

}

子实体具有组合键,并且具有PK实体,如下所示

public class ChildPK implements Serializable {

    /** The Constant serialVersionUID. */
    private static final …

我在通过级联删除孤儿删除另一个实体时遇到问题.当我清除相关的集合集合时它会起作用,但是当我将集合集合置为空时它不起作用.让我详细解释一下.配置代码段:

<class name="com.sample.CategoriesDefault" table="cats">
  <id name="id" column="id" type="string" length="40" access="property">
     <generator class="assigned" />
  </id>
  <version name="version" column="objVrs"  unsaved-value="negative"/>

 <set name="bla" lazy="false" cascade="all-delete-orphan" inverse="true">
      <key column="idCats" not-null="true"/>
       <one-to-many class="com.sample.BLA"/>
 </set>

<class name="com.sample.BLA" table="blaTEST">
   <id name="id" column="id" type="string" length="40" access="property">
     <generator class="assigned" />
   </id>
   <version name="version" column="objVrs"  unsaved-value="negative"/>
   <property name="bla" type="string" column="bla"/>
   <many-to-one name="parent" class="com.sample.CategoriesDefault" column="idCats" not-null="true"/>
</class>

我的示例代码:

Categories cats = new CategoriesDefault();
final Set<BLA> col = new HashSet<BLA>();
col.add(new BLA(cats));
cats.setBla(col);
cats.saveOrupdate(); // will update/insert it in the db.

以下工作正常,即:所有集合项都从数据库中移出. …

我在它们之间有PolicyDO和PolicyDocumentDO.relation如下

PolicyDO.hbm.xml

<bag name="listPolicyDocumentDOList" cascade="all-delete-orphan" lazy="false"   inverse="true">
            <key column="POLICYSEQ" />
            <one-to-many class="dataobjects.policy.PolicyDocumentDO" />

PolicyDO.java
protected List<PolicyDocumentDO> policyDocumentDOList = new ArrayList<PolicyDocumentDO>();
 public java.util.List<PolicyDocumentDO> getListPolicyDocumentDOList() {
    return this.policyDocumentDOList;
  }

  public void setListPolicyDocumentDOList(java.util.List<PolicyDocumentDO> list) {
      policyDocumentDOList.clear();
      policyDocumentDOList = list;
  }


    PolicyDocumentDO.hbm.xml

    <many-to-one name="parentGuidObj" class="dataobjects.policy.PolicyDO"  not-null="true" >
            <column name="POLICYSEQ"  />
    </many-to-one>  

我什么时候尝试从数据库中查询某些内容,如下所示

session = sessionFactory.openSession();
Query query = session.createQuery(strBuff.toString());
List listQuery = query.list();

我得到以下错误

org.hibernate.HibernateException: A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: 

dataobjects.policy.PolicyDO.listPolicyDocumentDOList

所以在谷歌搜索后,我在PolicyDO中设置listPolicyDocumentDOList时做了以下更改

public void setListPolicyDocumentDOList(java.util.List<PolicyDocumentDO> list) …

所以我有一个包含 DateActiveScheduleItem 列表的日程表对象。我从数据库中获取日程表，从列表中删除一个 DateActiveScheuleItem，并使用 Hibernate CrudRepository 中的 .save() 保存它。

nested exception is org.springframework.orm.jpa.JpaSystemException: A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: haughton.daniel.ShoutLoud.model.schedule.Schedule.dateActiveScheduleItems; nested exception is org.hibernate.HibernateException: A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: haughton.daniel.ShoutLoud.model.schedule.Schedule.dateActiveScheduleItems] with root causeorg.hibernate.HibernateException: A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: haughton.daniel.ShoutLoud.model.schedule.Schedule.dateActiveScheduleItems

时间表.java

@Entity
public class Schedule {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@ManyToOne
@JoinColumn(name = "user_id")
private …