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<many-to-one> and lazy loading does not work

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mba

Post subject: <many-to-one> and lazy loading does not work

Posted: Tue Oct 24, 2006 7:48 am

Newbie

Joined: Tue Aug 29, 2006 10:56 am
Posts: 15

Hi,

in my application <many-to-one> lazy loading does not work .

Hibernate version:3.1.3/3.2.0ga
Mapping:

Code:

<hibernate-mapping>
   <class name="de.mba.MyClass"
      table="MyTable">
      <id name="poi" type="string">
         <column name="POI" length="22" />
         <generator class="assigned" />
      </id>
      <property name="lupdDatetime" type="timestamp">
         <column name="LUPD_DATETIME" length="26" />
      </property>
      <property name="lupdProcess" type="string">
         <column name="LUPD_PROCESS" length="30" />
      ...
      
      <many-to-one name="assoc1"
         class="de.mba.MyAssoc"
         insert="false" update="false" not-found="ignore">
         <column name="POI" />
      </many-to-one>
      
   </class>
</hibernate-mapping>

The declaration of the attribute lazy with the value 'proxy' in the <many-to-one> element does not work too.
Thanks for your help!

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passos

Post subject:

Posted: Tue Oct 24, 2006 8:06 am

Beginner

Joined: Thu Sep 22, 2005 10:48 am
Posts: 30
Location: Rio de Janeiro, Brazil

set fetch="join" in your many-to-one mapping to automatic fetch

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mba

Post subject:

Posted: Tue Oct 24, 2006 9:44 am

Newbie

Joined: Tue Aug 29, 2006 10:56 am
Posts: 15

Thanks for your answer. It does not work.

In the reference guide:
Join fetching - Hibernate retrieves the associated instance or collection in the same SELECT, using an OUTER
JOIN.

I think that is not the solution.

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rezdog

Post subject:

Posted: Fri Nov 03, 2006 2:04 pm

Newbie

Joined: Wed Jan 21, 2004 5:12 pm
Posts: 8

I'm having a similar issue. It appears that the issue is with the not-found attribute. Setting that to ignore prevents Hibernate from proxying the many-to-one entity, and therefore disables the lazy loading. I think it has to do this to determine whether or not to assign a null value.

Scott

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