I have a situation where I have a one-to-many:

Document 1 ---> m DocumentVersion.

The document version has a composite-id.

<class name="com.eLynx.Core.Database.Entity.DocumentVersion"
 table="DocumentVersion"
 lazy="false">

 <composite-id >
 <key-many-to-one name="document"
 column="ContentId"
 class="com.eLynx.Core.Database.Entity.Document"/>

 <key-property name="version" column="Version" type="int"/>
 <key-property name="mimeType" column="MimeType" type="string"/>
 </composite-id>

 <timestamp name="CreationDate" source="db" />

 <property name="CSFileId" type="long">
 <column name="CSFileId" not-null="true"/>
 </property>

</class>

The Document class is a subclass:

<!-- Document subclass definition -->
<subclass name="com.eLynx.Core.Database.Entity.Document"
 discriminator-value="D">

 <list name="DocumentVersions"
 table="DocumentVersion"
 inverse="true"
 cascade="all">

 <key column="ContentId"/>
 <index column="version"/>
 <one-to-many class="com.eLynx.Core.Database.Entity.DocumentVersion"/
 </list>

</subclass>

I have test data where a document has one version. When I do the load from:

Document root = (Document) session.load (Document.class, 146L);
List<DocumentVersion> versions = root.getDocumentVersions();

then examine the list in the debugger I see:

[null, com.eLynx.Core.Database.Entity.DocumentVersion@a576d0d9]

I cannot, for the life of me, figure out why I have that null in the first position. Anyone have any ideas? Thanks in advance.