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From: ojb-dev@db.apache.org
To: ojb-dev@db.apache.org
Subject: =?iso-8859-1?q?=5BDB_OJB_Wiki=5D_New=3A__Bugs?=
Date: Thu, 18 Nov 2004 10:32:55 -0000
Message-ID: <20041118103255.33675.54926@minotaur.apache.org>

   Date: 2004-11-18T02:32:55
   Editor: VladimirKirichenko <razer@male.ru>
   Wiki: DB OJB Wiki
   Page: Bugs
   URL: http://wiki.apache.org/db-ojb/Bugs

   no comment

New Page:

org.apache.ojb.broker.accesslayer.MtoNCollectionPrefetcher bug

in method  {{{

    private Criteria buildPrefetchCriteria(Collection ids, String[] fkCols,=
 String[] itemFkCols,
            FieldDescriptor[] itemPkFields)
    {
        if (fkCols.length =3D=3D 1) //bug is here
        {
            return buildPrefetchCriteriaSingleKey(ids, fkCols[0], itemFkCol=
s[0], itemPkFields[0]); //only first item's foreign key passed
        }
        else
        {
            return buildPrefetchCriteriaMultipleKeys(ids, fkCols, itemFkCol=
s, itemPkFields);
        }

    }
}}}
assumption that if parent table has the only foreign key then item table ha=
s the only FK too is incorrect.
{{{
<collection-descriptor name=3D"recipients" element-class-ref=3D"nVerge.comm=
ons.User"
auto-delete=3D"link" auto-retrieve=3D"true" auto-update=3D"link"
indirection-table=3D"hot_folder_recipients">
 <fk-pointing-to-this-class column=3D"hot_folder_id"/>
 <fk-pointing-to-element-class column=3D"user_login"/>
 <fk-pointing-to-element-class column=3D"user_network_id"/> <!-- this FK is=
 not put into where criteria -->
</collection-descriptor>
}}}
Quickfix for this is =

 if (fkCols.length =3D=3D 1 && itemFkCols.length =3D=3D 1)=20

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