Cascading Delete in BC4J-UIXml application

Morning all,
I have a problem with a UIXml application that I was wondering somebody could help me with. Since I am new to this technology, please excuse the simplistic nature of the question.
I have a BC4J application working through UIX pages. In this application I have a form that deletes a record from the table. However, I am unable to determine how to perform an automatic cascading delete on the record since it has child records in another table.
Please advise. I shall update this thread after a successful workaround in order to provide a reference for others who may encounter this problem.
Thanks in advance for reading this post.
Adeel

This was resolved in the entity's association properties.

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</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
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<ejb-name>TeacherEJB</ejb-name>
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<cmr-field>
<cmr-field-name>teacher</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>student-has-teacher
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<multiplicity>Many</multiplicity>
<cascade-delete/>
<relationship-role-source>
<ejb-name>StudentEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>student</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type><cmr-field>
</ejb-relationship-role>
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1. Mention cascade delete in ejb-jar.xml and nothing mentioned in weblogic-cmp-rdbms-jar.xml.jar and in the database.
2. Mention nothing in ejb-jar.xml and nothing mentioned in weblogic-cmp-rdbms-jar.xml.jar but 'on cascade delete' mentioned in the database.
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Kindly help ASAP.
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=============================
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Nathan Voxland wrote:
I'm trying to use the cascade delete option and am having problems.
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<class name="RoomScene" objectid-class="RoomSceneId">
<extension vendor-name="kodo" key="jdbc-class-map"
value="base">
<extension vendor-name="kodo" key="table"
value="t_roomscene"/>
<extension vendor-name="kodo" key="pk-column" value="id_i"/>
</extension>
<extension vendor-name="kodo" key="jdbc-version-ind"
value="version-number">
<extension vendor-name="kodo" key="column"
value="rowversion_i"/>
</extension>
<field name="id" primary-key="true">
<extension vendor-name="kodo" key="jdbc-field-map"
value="value">
<extension vendor-name="kodo" key="column"
value="id_i"/>
</extension>
</field>
<field name="itemLinks">
<collection element-type="ItemLink"/>
<extension vendor-name="kodo" key="element-delete-action"
value="cascade"/>
<extension vendor-name="kodo" key="jdbc-field-map"
value="one-many">
<extension vendor-name="kodo" key="table"
value="t_mapitemroomscene"/>
<extension vendor-name="kodo" key="ref-column.id_i"
value="roomscene_id_i"/>
</extension>
</field>
</class>
<class name="ItemLink" objectid-class="ItemLinkId">
<extension vendor-name="kodo" key="jdbc-class-map" value="base">
<extension vendor-name="kodo" key="table" value="t_mapitemroomscene"/>
<extension vendor-name="kodo" key="pk-column" value="id_i"/>
</extension>
<extension vendor-name="kodo" key="jdbc-version-ind"
value="version-number">
<extension vendor-name="kodo" key="column" value="rowversion_i"/>
</extension>
<field name="id" primary-key="true">
<extension vendor-name="kodo" key="jdbc-field-map" value="value">
<extension vendor-name="kodo" key="column" value="id_i"/>
</extension>
</field>
<field name="item">
<extension vendor-name="kodo" key="jdbc-field-map" value="one-one">
<extension vendor-name="kodo" key="column.id_vc" value="item_id_vc"/>
</extension>
</field>
<field name="roomScene">
<extension vendor-name="kodo" key="jdbc-field-map" value="one-one">
<extension vendor-name="kodo" key="column.id_i"
value="roomscene_id_i"/>
</extension>
</field>
<field name="linkText">
<extension vendor-name="kodo" key="jdbc-field-map" value="value">
<extension vendor-name="kodo" key="column" value="linktext_vc"/>
</extension>
</field>
</class>
(each RoomScene has many ItemLinks)
but when I delete my RoomScene object, I get the following exception:
"kodo.util.FatalDataStoreException: ERROR: ExecUpdate: Fail to add
null value in not null attribute roomscene_id_i {prepstmnt 2515391
UPDATE t_mapitemroomscene SET roomscene_id_i = ? WHERE roomscene_id_i =
?} [code=0, state=null]
NestedThrowables:
com.solarmetric.jdbc.ReportingSQLException: ERROR: ExecUpdate: Fail to
add null value in not null attribute roomscene_id_i {prepstmnt 2515391
UPDATE t_mapitemroomscene SET roomscene_id_i = ? WHERE roomscene_id_i =
?} [code=0, state=null]
java.sql.SQLException: ERROR: ExecUpdate: Fail to add null value in
not null attribute roomscene_id_i
at
kodo.jdbc.sql.SQLExceptions.getFatalDataStore(SQLExceptions.java:42)
at
kodo.jdbc.sql.SQLExceptions.getFatalDataStore(SQLExceptions.java:24)
at
kodo.jdbc.runtime.JDBCStoreManager.flush(JDBCStoreManager.java:510)
at
kodo.runtime.PersistenceManagerImpl.flushInternal(PersistenceManagerImpl
.java:788)
at
kodo.runtime.PersistenceManagerImpl.beforeCompletion(PersistenceManagerI
mpl.java:644)
at
kodo.runtime.LocalManagedRuntime.commit(LocalManagedRuntime.java:69)
at
kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:
416)
at
net.mastertile.www.room.action.RoomSceneDeleteAction.executeLogic(RoomSc
eneDeleteAction.java:27)
my kodo.properties file is like this:
javax.jdo.PersistenceManagerFactoryClass:
kodo.jdbc.runtime.JDBCPersistenceManagerFactory
javax.jdo.option.RetainValues: true
javax.jdo.option.RestoreValues: true
javax.jdo.option.Optimistic: true
javax.jdo.option.NontransactionalWrite: false
javax.jdo.option.NontransactionalRead: true
javax.jdo.option.Multithreaded: false
javax.jdo.option.MsWait: 5000
javax.jdo.option.MinPool: 1
javax.jdo.option.MaxPool: 200
javax.jdo.option.IgnoreCache: true
javax.jdo.option.ConnectionFactoryName=java:comp/env/jdbc/default
javax.jdo.option.ConnectionFactory2Name=java:comp/env/jdbc/default
kodo.LicenseKey=XXXXXXXXXXX
kodo.jdbc.MappingFactory=metadata
kodo.DataCache=false
kodo.RemoteCommitProvider=sjvm
kodo.FlushBeforeQueries=false
kodo.jdbc.ForeignKeyConstraints=true
kodo.jdbc.SequenceFactory: native
kodo.jdbc.SchemaFactory: dynamic
We are using postgresql.
Thanks,
Nathan
Steve Kim
[email protected]
SolarMetric Inc.
http://www.solarmetric.com

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