使用FetchType.LAZY进行Hibernate ManyToOne无法获取延迟
我正在使用Hibernate和spring。
我有这样的模型类。
@Entity
@Table(name = "forumtopic")
public final class Forumtopic extends AbstractUserTracking implements
java.io.Serializable {
/**SNIP **/
private Forumcategory forumcategory;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "FkForumcategoryId", nullable = false)
public Forumcategory getForumcategory() {
return this.forumcategory;
}
public void setForumcategory(final Forumcategory forumcategory) {
this.forumcategory = forumcategory;
}
}
它一般工作,但类不是懒惰加载,但在加载ForumEntry后急切。
Hibernate:
select
forumtopic0_.PkId as PkId19_0_,
forumtopic0_.CreateDate as CreateDate19_0_,
forumtopic0_.FkCreateUserId as FkCreate3_19_0_,
forumtopic0_.FkLastUserId as FkLastUs4_19_0_,
forumtopic0_.LastChange as LastChange19_0_,
forumtopic0_.FkForumcategoryId as FkForum10_19_0_,
forumtopic0_.PublishCategory as PublishC6_19_0_,
forumtopic0_.State as State19_0_,
forumtopic0_.Text as Text19_0_,
forumtopic0_.Topic as Topic19_0_,
forumtopic0_.FkTpUserId as FkTpUserId19_0_
from
forumtopic forumtopic0_
where
forumtopic0_.PkId=?
Hibernate:
select
forumcateg0_.PkId as PkId17_0_,
forumcateg0_.CreateDate as CreateDate17_0_,
forumcateg0_.Name as Name17_0_,
forumcateg0_.FkRequestId as FkReques4_17_0_,
forumcateg0_.FkTpUserId as FkTpUserId17_0_
from
forumcategory forumcateg0_
where
forumcateg0_.PkId=?
在没有调用getter的情况下,在ForumTopic之后加载了ForumCategory。
这个问题出现在我的所有@ ManyToOne关联中。但是@OneToMany关联是懒洋洋地加载的。
我正在使用maven2进行构建。这些是我的依赖。
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.3.1.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>ejb3-persistence</artifactId>
<version>1.0.2.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<type>jar</type>
<version>3.4.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<type>jar</type>
<version>3.4.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-search</artifactId>
<version>3.1.0.GA</version>
</dependency>
有人可以帮我理解发生了什么吗?
没有找到相关结果
已邀请:
2 个回复
辰炔诚薯
,因此Hibernate无法为它们生成惰性代理。尝试从类声明中删除
。
济畦刨
这将在同一会话中获取ForumCategory。否则,您必须在getAllForumTopic的调用函数中创建一个事务,并在需要调用getForumCategory时使用相同的事务。