lazy="false"的问题?

[suncheng_hong]

一张表Sort(类别),一张表errata(勘误)
Sort与errata多对一．一个类别下有多个勘误．
Sort的hbm文件是
...
<set name="erratas" inverse="true" lazy="false">
<key>
<column name="sort_id" not-null="true" />
</key>
<one-to-many class="com.daacc.dao.errata.Errata" />
</set>
...
Sort的pojo:
...
private Set erratas=new HashSet(0);
...
errata的hbm
...
<many-to-one name="sort"
class="com.daacc.dao.sort.Sort" fetch="select" lazy="false">
<column name="sort_id" not-null="true" unique="true" />
</many-to-one>
...
errata的pojo:
...
private Sort sort;
...

当我要查询所有种类时.
如果
<set name="erratas" inverse="true" lazy="false">
<key>
<column name="sort_id" not-null="true" />
</key>
<one-to-many class="com.daacc.dao.errata.Errata" />
</set>
加上lazy="false"
出现
Hibernate: select sort0_.id as id0_, sort0_.parent_id as parent2_2_0_, sort0_.name as name2_0_, sort0_.description as descript4_2_0_ from sort sort0_ where sort0_.id=?
Hibernate: select erratas0_.sort_id as sort3_1_, erratas0_.id as id1_, erratas0_.id as id0_, erratas0_.question_id as question2_8_0_, erratas0_.sort_id as sort3_8_0_, erratas0_.page as page8_0_, erratas0_.description as descript5_8_0_, erratas0_.source as source8_0_, erratas0_.correct as correct8_0_, erratas0_.date as date8_0_, erratas0_.state as state8_0_ from errata erratas0_ where erratas0_.sort_id=?
org.springframework.orm.hibernate3.HibernateSystemException: illegal access to loading collection; nested exception is org.hibernate.LazyInitializationException: illegal access to loading collection
org.hibernate.LazyInitializationException: illegal access to loading collection
的错误.
如果不加lazy="false" 能查出种类,但是我继续查种类的分类时,
我用这样的代码
Sort sort = (Sort) BusFacade.sortBus.getSort(Integer.parseInt(sortId));
Set set = sort.getErratas();
出现
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.daacc.dao.sort.Sort.erratas - no session or session was closed
的错误
如何配置多对一关系呢?

[zxh2208180]

你把errata的hbm文件的lazy="false"去掉就好了

[suncheng_hong]

如果去掉的话.种类能查到.
但是我想查种类的勘误，
用这样的代码
Sort sort = (Sort) BusFacade.sortBus.getSort(Integer.parseInt(sortId));
Set set = sort.getErratas();
Iterator it = set.iterator();
List errList = new ArrayList();
while (it.hasNext()) {
errList.add(it.next());
}
request.setAttribute("errList", errList);

这样也会报错．
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.daacc.dao.sort.Sort.erratas - no session or session was closed

[zxh2208180]

Sort的hbm文件的lazy="false"保留,inverse="true"改成false,增加cascade="all-delete-orphan"和outer-join="true";
把errata的hbm文件的lazy="false"去掉;增加cascade="save-update" outer-join="auto"

[suncheng_hong]

九天，哪里有hbm属性的文档．在官方的没找到．
hashCode方法中包含了及联属性所致．

[zxh2208180]

Set erratas=new HashSet(0);把0去掉.
文档我也不知道哪有,自己搜索下吧

[suncheng_hong]

谢谢.