Hello Neal,
specify key-fields for one of the ejb-relationship-role's. This should
solve the problem.
alex
Tuesday, October 08, 2002, 11:58:35 PM, you wrote:
NS> Hi All,
NS> Am I misunderstanding the meaning of Unidirectional? I have declared a
NS> One to One Unidirectional relation from a RepositoryEntry to a
NS> Signature. When JBoss creates the tables, RepositoryEntry is given a
NS> signature field, as expected, but it also creates a RepositoryEntry
NS> field in the Signature table. I don't care about being able to get
NS> from a Signature back to its RepositoryEntry, in fact I want to be
NS> able to add Signatures to other objects in my schema besides
NS> RepositoryEntry.
NS> What's going on? Here's the relations section from the ejb-jar.xml:
NS> <relationships >
NS> <ejb-relation >
NS> <ejb-relation-name>entry-signature</ejb-relation-name>
NS> <!-- unidirectional -->
NS> <ejb-relationship-role >
NS> <ejb-relationship-role-name>has-signature</ejb-relationship-role-name>
NS> <multiplicity>One</multiplicity>
NS> <relationship-role-source >
NS> <ejb-name>RepositoryEntry</ejb-name>
NS> </relationship-role-source>
NS> <cmr-field >
NS> <cmr-field-name>signature</cmr-field-name>
NS> </cmr-field>
NS> </ejb-relationship-role>
NS> <ejb-relationship-role >
NS> <ejb-relationship-role-name>signature-has-entry</ejb-relationship-role-name>
NS> <multiplicity>One</multiplicity>
NS> <cascade-delete/>
NS> <relationship-role-source >
NS> <ejb-name>Signature</ejb-name>
NS> </relationship-role-source>
NS> </ejb-relationship-role>
NS> </ejb-relation>
NS> </relationships>
NS> And in my jbosscmp-jdbc.xml I've done the following:
NS> <relationships>
NS> <ejb-relation>
NS> <ejb-relation-name>entry-signature</ejb-relation-name>
NS> <foreign-key-mapping/>
NS> <ejb-relationship-role>
NS> <ejb-relationship-role-name>has-signature</ejb-relationship-role-name>
NS> <fk-constraint>true</fk-constraint>
NS> </ejb-relationship-role>
NS> <ejb-relationship-role>
NS> <ejb-relationship-role-name>signature-has-entry</ejb-relationship-role-name>
NS> <fk-constraint>false</fk-constraint>
NS> </ejb-relationship-role>
NS> </ejb-relation>
NS> </relationships>
NS> The <fk-constraint> elements I added recently to see if they had an
NS> effect on the Signature table, but they don't.
NS> Next I tried making the multiplicity Many on the RepositoryEntry side
NS> of the relation, and regeneration of the tables shows that the field
NS> in the Signature table is not there anymore. Why is it present in a 1
NS> to 1 unidirectional relation, and not in a Many to One?
NS> Thanks for enlightenment. :)
NS> -Neal
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