Hi,
i am using JBoss3.0.0RC1, J2SDK1.4 on Windows 2000 and try to use relations.
I have the following beans:
person (PK: mandant, number, type) and some attributes
employee (PK: mandant, number) type as attribute and others.
In this case i want to use one-to-one unidirectional relation.
In the standard way JBoss generates additional columns in employee
called person_mandant_id, person_number_id and person_type_id.
But i won't that, because the attributes always exist and could be
reused.
if i use in jbosscmp-jdbc.xml:
---
<ejb-relation>
<ejb-relation-name>EmployeePerson</ejb-relation-name>
<foreign-key-mapping/>
<ejb-relationship-role>
<ejb-relationship-role-name>employee-is-person</ejb-relationship-role-name>
<key-fields>
<key-field>
<field-name>mandant</field-name>
<column-name>mandant</column-name>
</key-field>
<key-field>
<field-name>number</field-name>
<column-name>number</column-name>
</key-field>
<key-field>
<field-name>type</field-name>
<column-name>type</column-name>
</key-field>
</key-fields>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>person-employee</ejb-relationship-role-name>
<key-fields/>
</ejb-relationship-role>
</ejb-relation>
---
JBoss throws the message:
---
org.jboss.deployment.DeploymentException: CMP field for key not found: field name=type
at
org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCRelationshipRoleMetaData.loadKeyFields(JDBCRe
lationshipRoleMetaData.java:374)
---
if i use this in jbosscmp-jdbc:
---
<ejb-relation>
<ejb-relation-name>EmployeePerson</ejb-relation-name>
<foreign-key-mapping/>
<ejb-relationship-role>
<ejb-relationship-role-name>employee-is-person</ejb-relationship-role-name>
<key-fields/>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>person-employee</ejb-relationship-role-name>
<key-fields>
<key-field>
<field-name>mandant</field-name>
<column-name>mandant</column-name>
</key-field>
<key-field>
<field-name>number</field-name>
<column-name>number</column-name>
</key-field>
<key-field>
<field-name>type</field-name>
<column-name>type</column-name>
</key-field>
</key-fields>
</ejb-relationship-role>
</ejb-relation>
---
than jboss throws thiss error:
---
org.jboss.deployment.DeploymentException: CMP field for key not found: field name=type
at
org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCRelationshipRoleMetaData.loadKeyFields(JDBCRe
lationshipRoleMetaData.java:374)
---
What is the right way ?
so long
Ingo Bruell
---
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