Help needed for N-N relationship setup
Hello everybody,
I'm trying to setup my first N-N relationship and I have some unexpected failures at runtime (execption thrown by the mysql driver).
I have a 'List' EJB with a N-N relationship with the 'Equity' EJB. Here is the relevant source code extract for EJB 'List' :
public abstract class ListBean implements EntityBean {
.../...
/**
* Returns the equities of this list
* @return a Collection of equities
*
* @ejb.interface-method
*
* @ejb.relation
* name="List-Equity"
* role-name="List is made out of zero or several equities"
* target-ejb="Equity"
* target-role-name="Equity belong to zero or several lists"
* target-multiple="yes"
*
* @jboss.relation
* related-pk-field="ID"
* fk-column="nsq_eqt"
*
* @jboss.target-relation
* related-pk-field="ID"
* fk-column="nsq_lst"
*
* @jboss.relation-mapping="relation-table"
*
* @jboss.relation-table
* table-name="l02_eqt_lst"
* create-table="true"
*
*/
public abstract Collection getEquities();
/**
* @ejb.interface-method
* view-type="both"
*/
public abstract void setEquities(Collection equities);
/**
* @ejb.interface-method
* view-type="both"
*/
public void addEquity(Integer equityID)
throws EJBHomeFactoryException {
try {
EquityLocalHome equityHome = ...
EquityLocal equity = (EquityLocal) equityHome.findByPrimaryKey(equityID);
Collection equities = this.getEquities();
equities.add(equity);
} catch (FinderException e) {
// Do nothing : equity not found
}
}
EJB classes were generated using XDoclet.
Both EJB's were deployed without error, and the relationship table (l02_lst_eqt) was created with both expected foreigh keys colmun at deployment time.
But, at run-time, when the 'addEquity' method is called on a 'List' EJB instance, the following exception is thrown :
14:51:44,354 ERROR [LogInterceptor] TransactionRolledbackLocalException in method: null, causedBy:
java.sql.SQLException: Column not found, message from server: "Unknown column 'create_date' in 'field list'"
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1651)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:889)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:956)
at com.mysql.jdbc.Connection.execSQL(Connection.java:1874)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1538)
at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:289)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityCommand.java:165)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityCommand.java:83)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadEntity(JDBCStoreManager.java:634)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadEntity(JDBCStoreManager.java:616)
at org.jboss.ejb.plugins.CMPPersistenceManager.loadEntity(CMPPersistenceManager.java:395)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.loadEntity(CachedConnectionInterceptor.java:353)
at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:232)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:56)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:174)
at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:89)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:53)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:273)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:104)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:117)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
at org.jboss.ejb.EntityContainer.internalInvoke(EntityContainer.java:484)
at org.jboss.ejb.Container.invoke(Container.java:700)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.invokeAddRelation(JDBCCMRFieldBridge.java:916)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.createRelationLinks(JDBCCMRFieldBridge.java:818)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.RelationSet.add(RelationSet.java:112)
at com.rubis.app.basics.ejb.ListBean.addEquity(ListBean.java:274)
.../...
I have no clue where this 'create_date' field comes from !!!! I have to such field name in my entire database ...
Thanks in advance for some tip.
Fred
PS: I'm using Jboss 3.2.2 and MySql as the database.