Problems with lazy initialization

JasDA · **Joined:** Wed Nov 02, 2005 6:07 am **Posts:** 12

I've still got a problem with a lazy initialization which I couldn't solve with the help of other topics on this subject.

In my mapping file I've got a simple set-element:

Code:

<set name="groupTypes" >
  <key update="false">
    <column name="bp_cd"/>
    <column name="bp_ods_cd"/>
    <column name="cust_nb"/>
  </key>
  <one-to-many class="CustomerGroupType" />
</set>

In my DAO-class I've got the following search:

Code:

Session sess = getHibernateTemplate().getSessionFactory().getCurrentSession();
        
        Criteria crit = sess.createCriteria(CustomerAddress.class)
            .setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY)
            .setFetchMode("groupTypes", FetchMode.JOIN)
            .createAlias("groupTypes", "groupTypes")
            .createAlias("groupTypes.details", "groupTypeDetails")
            .add(Expression.eq("BpCd", customer.getBpCd()))
            .add(Expression.eq("BpOdsCd", customer.getBpOdsCd()))
            .add(Expression.eq("AddrTyCd", "002"))
            .addOrder(Order.asc("CustNm"));

        .........

          List result = crit.list();

Unfortunately I got the error "failed to lazily initialize a collection of role".

I think it's just an understanding problem, but can someone please help me?

The error occurs if I try to get access to groupTypes in my Action-class:

Code:

 for (Iterator iter = list.iterator(); iter.hasNext();)
       {
            CustomerAddress e = (CustomerAddress) iter.next();
            e.getGroupTypes() ........
        }

JasDA

kgignatyev · **Posted:** Thu Feb 16, 2006 2:05 pm

Please post all your relevant code as suggested by forum post template.
I suspect that you are trying to iterate through that collection when session where the object was created is already closed.