按 id 加载实体时 Hibernate enableFilter 不起作用

Question

我有3个类:

Event
PublicEvent extends Event
PersonalEvent extends Event

我的休眠映射文件类似于下面的内容。我想为 PersonalEvent 添加一个过滤器，在加载这个对象之前，我启用了过滤器。但这不起作用。我的休眠版本是 4.3.11.Final.

Event.hbm.xml

<hibernate-mapping>
    <class name="org.calendar.Event">
        ...
        <filter name="personalEventAuthorize" condition="person_ID = :personId" />
    </class>
    <joined-subclass name="org.calendar.PersonalEvent" extends="org.calendar.Event">
        <key column="id" property-ref="id" />
        ...
        <many-to-one name="person" column="person_ID" entity-name="org.person.Person" />
     </joined-subclass>
     <joined-subclass name="org.calendar.PublicEvent" extends="org.calendar.Event">
        <key column="id" property-ref="id" />
        ...
     </joined-subclass>
     <filter-def name="personEventAuthorize">
        <filter-param name="personId" type="integer" />
     </filter-def>
</hibernate-mapping>

个人事件存储库

@Override
public PersonalEvent load(Long id) {
    Filter filter = getSession().enableFilter("personEventAuthorize");
    filter.setParameter("personId", getAuthenticatedPersonId());
    return super.loadById(id);
}

hibernate 生成了 SQL 没有我的过滤器的查询。我的问题是什么？为什么休眠不能为加入子类启用过滤器？感谢大家...

Answer 1

This is not a bug, it's the intended behavior。我更新了 Hibernate 用户指南以使其更加明显。

直接加载实体时@Filter不适用：

Account account1 = entityManager.find( Account.class, 1L );
Account account2 = entityManager.find( Account.class, 2L );

assertNotNull( account1 );
assertNotNull( account2 );

如果您使用实体查询（JPQL、HQL、标准 API），则它适用：

Account account1 = entityManager.createQuery(
    "select a from Account a where a.id = :id", 
    Account.class)
    .setParameter( "id", 1L )
.getSingleResult();
assertNotNull( account1 );
try {
    Account account2 = entityManager.createQuery(
        "select a from Account a where a.id = :id", 
        Account.class)
    .setParameter( "id", 2L )
    .getSingleResult();
}
catch (NoResultException expected) {
    expected.fillInStackTrace();
}

因此，作为解决方法，使用实体查询（JPQL、HQL、标准 API）加载实体。

按 id 加载实体时 Hibernate enableFilter 不起作用

Hibernate enableFilter not working when loading entity by id

java

orm

hibernate

nhibernate-mapping

hibernate-filters