Hi, I have this problem inserting new records, i´m a newbie on hibernate.
I made my table in oracle, the primary key is a VARCHAR2(10) called COD_TIPO_CUENTA, I allready debuged the Action class and the properties are comming rigth from the form. I can´t realize what is happenning. Please help me.

Hibernate version: hibernate2.jar

Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

<hibernate-mapping package="sv.com.equifax.gestor.model">
<class name="TiposCuenta" table="TIPOS_CUENTA">
<id
column="COD_TIPO_CUENTA"
name="CodTipoCuenta"
type="string"
>
<generator class="vm" />
</id>
<property
column="DESCRIPCION"
length="200"
name="Descripcion"
not-null="true"
type="string"
/>
<set inverse="true" name="OperacionesInternacionalesSet">
<key column="COD_TIPO_CUENTA" />
<one-to-many class="OperacionesInternacionales" />
</set>
<set inverse="true" name="DepositosInversionesSet">
<key column="COD_TIPO_CUENTA" />
<one-to-many class="DepositosInversiones" />
</set>
</class>
</hibernate-mapping>


Code between sessionFactory.openSession() and session.close():
TiposCuentaVariosForm pForm = (TiposVariosForm) form;
TiposCuenta p = new TiposCuenta();
p.setCodTipoCuenta(pForm.getCodigo());
p.setDescripcion(pForm.getDescripcion());

Full stack trace of any exception that occurs:
net.sf.hibernate.id.IdentifierGenerationException: this id generator generates long, integer, short
at net.sf.hibernate.id.IdentifierGeneratorFactory.createNumber(IdentifierGeneratorFactory.java:97)
at net.sf.hibernate.id.IncrementGenerator.generate(IncrementGenerator.java:44)
at net.sf.hibernate.impl.SessionImpl.saveWithGeneratedIdentifier(SessionImpl.java:774)
at net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:747)
at sv.com.equifax.gestor.catalogos.TiposCuentaAction.execute(TiposCuentaAction.java:33)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)


Name and version of the database you are using:
ORACLE 9i

The error in the stack trace explains it clearly - eg generator requires a long when your using a string.

Also, you need to use the transaction API (can be managed), it appears you were not doing so.

I strongly suggest you read the docs more closely and try some simple examples before getting into relationships etc.

Maybe read this as a starter http://www.systemmobile.com/articles/IntroductionToHibernate.html
look at the code as well.