Problem inserting one-to-many collection

Question

Hi,
I've been trying to get an object (CMDMessage) that has a one-to-many collection (CMDMessageXREF)
inserted into the database, but no matter what I try I can't seem to get the collection to grab the
foreign key value of 'msg_id' to populate that field in the CMDMessageXREF object, I keep getting a nul value.
From reading the forums, it seems the best way to get this value is to setup a back reference one-to-one mapping from the collection to the parent
object, but this doesn't seem to be working from me.
I've attached the pertinent client code as well as the pertinent information from the descriptors and would
appreciate any help on this.
Thanks,
Mark
Client code:
CMDMessage note = new CMDMessage();
note.setAuthorId(new Double(58402));
note.setMsgSubject("Sequence test2");
java.util.ArrayList xrefCollection = new java.util.ArrayList();
CMDMessageXREF xref = new CMDMessageXREF();
xref.setRecipientId(new Double(58400));
xref.setRecipientType("org");
xrefCollection.add(xref);
note.setCmdMessageXrefCollection(xrefCollection);
// runs transaction     invoking UnitOfWork to insert objects
TransactionEngine.insert(note);
Descriptors:
public Descriptor buildCMDMessageDescriptor() {
     Descriptor descriptor = new Descriptor();
     descriptor.setJavaClass(CMDMessage.class);
     descriptor.addTableName("CMD_MESSAGE");
     descriptor.addPrimaryKeyFieldName("CMD_MESSAGE.MSG_ID");
     // Descriptor properties.
     descriptor.useNoIdentityMap();
     descriptor.setIdentityMapSize(1000);
     descriptor.useRemoteNoIdentityMap();
     descriptor.setRemoteIdentityMapSize(1000);
     descriptor.setSequenceNumberFieldName("CMD_MESSAGE.MSG_ID");
     descriptor.setSequenceNumberName("CMD_MSG_ID_SEQUENCE");
     descriptor.alwaysConformResultsInUnitOfWork();
     descriptor.onlyRefreshCacheIfNewerVersion();
     descriptor.setAlias("CMDMessage");
     // Query manager.
     descriptor.useChangedFieldsLocking();
     descriptor.getQueryManager().checkDatabaseForDoesExist();
     //Named Queries
     // Event manager.
     // Mappings.
     DirectToFieldMapping msgIdMapping = new DirectToFieldMapping();
     msgIdMapping.setAttributeName("msgId");
     msgIdMapping.setGetMethodName("getMsgId");
     msgIdMapping.setSetMethodName("setMsgId");
     msgIdMapping.setFieldName("CMD_MESSAGE.MSG_ID");
     descriptor.addMapping(msgIdMapping);
     DirectToFieldMapping msgSubjectMapping = new DirectToFieldMapping();
     msgSubjectMapping.setAttributeName("msgSubject");
     msgSubjectMapping.setGetMethodName("getMsgSubject");
     msgSubjectMapping.setSetMethodName("setMsgSubject");
     msgSubjectMapping.setFieldName("CMD_MESSAGE.MSG_SUBJECT");
     descriptor.addMapping(msgSubjectMapping);
     OneToManyMapping cmdMessageXrefCollectionMapping = new OneToManyMapping();
     cmdMessageXrefCollectionMapping.setAttributeName("cmdMessageXrefCollection");
     cmdMessageXrefCollectionMapping.setGetMethodName("getCmdMessageXrefCollection");
     cmdMessageXrefCollectionMapping.setSetMethodName("setCmdMessageXrefCollection");
     cmdMessageXrefCollectionMapping.setReferenceClass(CMDMessageXREF.class);
     cmdMessageXrefCollectionMapping.useTransparentCollection();
     cmdMessageXrefCollectionMapping.useCollectionClass(oracle.toplink.indirection.IndirectList.class);
     cmdMessageXrefCollectionMapping.readOnly();
     cmdMessageXrefCollectionMapping.addTargetForeignKeyFieldName("CMD_MESSAGE_XREF.MSG_ID", "CMD_MESSAGE.MSG_ID");
     descriptor.addMapping(cmdMessageXrefCollectionMapping);
     return descriptor;
public Descriptor buildCMDMessageXREFDescriptor() {
     Descriptor descriptor = new Descriptor();
     descriptor.setJavaClass(CMDMessageXREF.class);
     descriptor.addTableName("CMD_MESSAGE_XREF");
     descriptor.addPrimaryKeyFieldName("CMD_MESSAGE_XREF.ID");
     // Descriptor properties.
     descriptor.useNoIdentityMap();
     descriptor.setIdentityMapSize(1000);
     descriptor.useRemoteNoIdentityMap();
     descriptor.setRemoteIdentityMapSize(1000);
     descriptor.setSequenceNumberFieldName("CMD_MESSAGE_XREF.ID");
     descriptor.setSequenceNumberName("CMD_MSG_XREF_ID_SEQ");
     descriptor.alwaysConformResultsInUnitOfWork();
     descriptor.onlyRefreshCacheIfNewerVersion();
     descriptor.setAlias("CMDMessageXREF");
     // Query manager.
     descriptor.useChangedFieldsLocking();
     descriptor.getQueryManager().checkDatabaseForDoesExist();
     //Named Queries
     // Event manager.
     // Mappings.
     DirectToFieldMapping idMapping = new DirectToFieldMapping();
     idMapping.setAttributeName("id");
     idMapping.setGetMethodName("getId");
     idMapping.setSetMethodName("setId");
     idMapping.setFieldName("CMD_MESSAGE_XREF.ID");
     descriptor.addMapping(idMapping);
     DirectToFieldMapping msgIdMapping = new DirectToFieldMapping();
     msgIdMapping.setAttributeName("msgId");
     msgIdMapping.setGetMethodName("getMsgId");
     msgIdMapping.setSetMethodName("setMsgId");
     msgIdMapping.setFieldName("CMD_MESSAGE_XREF.MSG_ID");
     descriptor.addMapping(msgIdMapping);
     DirectToFieldMapping recipientIdMapping = new DirectToFieldMapping();
     recipientIdMapping.setAttributeName("recipientId");
     recipientIdMapping.setGetMethodName("getRecipientId");
     recipientIdMapping.setSetMethodName("setRecipientId");
     recipientIdMapping.setFieldName("CMD_MESSAGE_XREF.RECIPIENT_ID");
     descriptor.addMapping(recipientIdMapping);
     OneToOneMapping cmdMessageInfoMapping = new OneToOneMapping();
     cmdMessageInfoMapping.setAttributeName("cmdMessageInfo");
     cmdMessageInfoMapping.setGetMethodName("getCmdMessageInfoHolder");
     cmdMessageInfoMapping.setSetMethodName("setCmdMessageInfoHolder");
     cmdMessageInfoMapping.setReferenceClass(CMDMessage.class);
     cmdMessageInfoMapping.useBasicIndirection();
     cmdMessageInfoMapping.readOnly();
     cmdMessageInfoMapping.addTargetForeignKeyFieldName("CMD_MESSAGE.MSG_ID", "CMD_MESSAGE_XREF.MSG_ID");
     descriptor.addMapping(cmdMessageInfoMapping);
     return descriptor;
}

Answer 1

Chris,
Ok, I've tried both approaches
1. using direct field mapping, getting rid of the one to one mapping on the CMDMessageXREF object, and adding this line xref.setMsgId( note.getMsgId()
and
2. removing the readOnly line for the mappings and setting the CMDMessage in the CMDMessageXREF object as shown below in bold.
but still am getting the same error. Could this be because the MSG_ID field in the database is NOT NULL? Otherwise, I am not seeing what else I can do differently to set this up. Below is the updated relevant code and descriptor showing the second approach I used.
Thanks for the help,
Mark
Client code
CMDMessage note = new CMDMessage();
note.setAuthorId(new Double(58402));
note.setMsgSubject("Sequence test2");
java.util.ArrayList xrefCollection = new java.util.ArrayList();
CMDMessageXREF xref = new CMDMessageXREF();
xref.setRecipientId(new Double(58400));
// added to set value to valueHolder
xref.setCmdMessageInfo(note);
xrefCollection.add(xref);
note.setCmdMessageXrefCollection(xrefCollection);
TransactionEngine.insert(note);
Descriptors
public Descriptor buildCMDMessageDescriptor() {
     Descriptor descriptor = new Descriptor();
     descriptor.setJavaClass(CMDMessage.class);
     descriptor.addTableName("CMD_MESSAGE");
     descriptor.addPrimaryKeyFieldName("CMD_MESSAGE.MSG_ID");
     // Descriptor properties.
     descriptor.useNoIdentityMap();
     descriptor.setIdentityMapSize(1000);
     descriptor.useRemoteNoIdentityMap();
     descriptor.setRemoteIdentityMapSize(1000);
     descriptor.setSequenceNumberFieldName("CMD_MESSAGE.MSG_ID");
     descriptor.setSequenceNumberName("CMD_MSG_ID_SEQUENCE");
     descriptor.alwaysConformResultsInUnitOfWork();
     descriptor.onlyRefreshCacheIfNewerVersion();
     descriptor.setAlias("CMDMessage");
     // Query manager.
     descriptor.useChangedFieldsLocking();
     descriptor.getQueryManager().checkDatabaseForDoesExist();
     //Named Queries
     // Event manager.
     // Mappings.
     DirectToFieldMapping msgIdMapping = new DirectToFieldMapping();
     msgIdMapping.setAttributeName("msgId");
     msgIdMapping.setGetMethodName("getMsgId");
     msgIdMapping.setSetMethodName("setMsgId");
     msgIdMapping.setFieldName("CMD_MESSAGE.MSG_ID");
     descriptor.addMapping(msgIdMapping);
     OneToManyMapping cmdMessageXrefCollectionMapping = new OneToManyMapping();
     cmdMessageXrefCollectionMapping.setAttributeName("cmdMessageXrefCollection");
     cmdMessageXrefCollectionMapping.setGetMethodName("getCmdMessageXrefCollection");
     cmdMessageXrefCollectionMapping.setSetMethodName("setCmdMessageXrefCollection");
     cmdMessageXrefCollectionMapping.setReferenceClass(CMDMessageXREF.class);
     cmdMessageXrefCollectionMapping.useTransparentCollection();
     cmdMessageXrefCollectionMapping.useCollectionClass(oracle.toplink.indirection.IndirectList.class);
     cmdMessageXrefCollectionMapping.addTargetForeignKeyFieldName("CMD_MESSAGE_XREF.MSG_ID", "CMD_MESSAGE.MSG_ID");
     descriptor.addMapping(cmdMessageXrefCollectionMapping);
     return descriptor;
public Descriptor buildCMDMessageXREFDescriptor() {
     Descriptor descriptor = new Descriptor();
     descriptor.setJavaClass(CMDMessageXREF.class);
     descriptor.addTableName("CMD_MESSAGE_XREF");
     descriptor.addPrimaryKeyFieldName("CMD_MESSAGE_XREF.ID");
     // Descriptor properties.
     descriptor.useNoIdentityMap();
     descriptor.setIdentityMapSize(1000);
     descriptor.useRemoteNoIdentityMap();
     descriptor.setRemoteIdentityMapSize(1000);
     descriptor.setSequenceNumberFieldName("CMD_MESSAGE_XREF.ID");
     descriptor.setSequenceNumberName("CMD_MSG_XREF_ID_SEQ");
     descriptor.alwaysConformResultsInUnitOfWork();
     descriptor.onlyRefreshCacheIfNewerVersion();
     descriptor.setAlias("CMDMessageXREF");
     // Query manager.
     descriptor.useChangedFieldsLocking();
     descriptor.getQueryManager().checkDatabaseForDoesExist();
     //Named Queries
     // Event manager.
     // Mappings.
     DirectToFieldMapping idMapping = new DirectToFieldMapping();
     idMapping.setAttributeName("id");
     idMapping.setGetMethodName("getId");
     idMapping.setSetMethodName("setId");
     idMapping.setFieldName("CMD_MESSAGE_XREF.ID");
     descriptor.addMapping(idMapping);
     DirectToFieldMapping recipientIdMapping = new DirectToFieldMapping();
     recipientIdMapping.setAttributeName("recipientId");
     recipientIdMapping.setGetMethodName("getRecipientId");
     recipientIdMapping.setSetMethodName("setRecipientId");
     recipientIdMapping.setFieldName("CMD_MESSAGE_XREF.RECIPIENT_ID");
     descriptor.addMapping(recipientIdMapping);
     OneToOneMapping cmdMessageInfoMapping = new OneToOneMapping();
     cmdMessageInfoMapping.setAttributeName("cmdMessageInfo");
     cmdMessageInfoMapping.setGetMethodName("getCmdMessageInfoHolder");
     cmdMessageInfoMapping.setSetMethodName("setCmdMessageInfoHolder");
     cmdMessageInfoMapping.setReferenceClass(CMDMessage.class);
     cmdMessageInfoMapping.useBasicIndirection();
     cmdMessageInfoMapping.addTargetForeignKeyFieldName("CMD_MESSAGE.MSG_ID", "CMD_MESSAGE_XREF.MSG_ID");
descriptor.addMapping(cmdMessageInfoMapping);
     return descriptor;
}