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Old 09-19-2012, 08:05 PM   #1
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Ebean: exception when a field that is related to another entity is null


I have this entity where either one of two fields has to be set and they both point to a different entity.

I have both fields set as @ManyToOne and have set their @JoinColumns accordingly.

For the sake of the example, say entity A has a field that is related to entity B and another to entity C. They are supposed to be mutually exclusive, if you set b then c will be null and viceversa.

Something like:

public class A {

    private B b;
    private C c;

At the moment I'm using only one of the fields so if I comment out the other unused field (and it's getter/setter) I can use the entity without a single hiccup.

However, when I uncomment it (but don't set anything on it..... or even if I set it to null) I get this exception when I try to save a new instance of A:

javax.persistence.PersistenceException: ERROR executing DML bindLog[] error[Unknown Types value.]
	at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(
	at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.insert(
	at com.avaje.ebeaninternal.server.persist.DefaultPersistExecute.executeInsertBean(
	at com.avaje.ebeaninternal.server.core.PersistRequestBean.executeNow(
	at com.avaje.ebeaninternal.server.core.PersistRequestBean.executeOrQueue(
	at com.avaje.ebeaninternal.server.persist.DefaultPersister.insert(
	at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveVanillaInsert(
	at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveVanillaRecurse(
	at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveRecurse(
	at la.cps.warp.daemon.DaemonClient.processMessage(
	at la.cps.warp.daemon.DaemonClient.getMessage(
Caused by: org.postgresql.util.PSQLException: Unknown Types value.
	at org.postgresql.jdbc2.AbstractJdbc2Statement.setNull(
	at org.postgresql.jdbc3.AbstractJdbc3Statement.setNull(
	at org.postgresql.jdbc4.AbstractJdbc4Statement.setNull(
	at com.avaje.ebeaninternal.server.lib.sql.ExtendedPreparedStatement.setNull(
	at com.avaje.ebeaninternal.server.type.DataBind.setNull(
	at com.avaje.ebeaninternal.server.type.ScalarTypeUUID.bind(
	at com.avaje.ebeaninternal.server.type.ScalarTypeUUID.bind(
	at com.avaje.ebeaninternal.server.deploy.BeanProperty.bind(
	at com.avaje.ebeaninternal.server.persist.dml.DmlHandler.bindInternal(
	at com.avaje.ebeaninternal.server.persist.dml.DmlHandler.bind(
	at com.avaje.ebeaninternal.server.persist.dmlbind.BindableAssocOne.dmlBind(
	at com.avaje.ebeaninternal.server.persist.dmlbind.BindableAssocOne.dmlBind(
	at com.avaje.ebeaninternal.server.persist.dmlbind.BindableList.dmlBind(
	at com.avaje.ebeaninternal.server.persist.dml.InsertMeta.bind(
	at com.avaje.ebeaninternal.server.persist.dml.InsertHandler.bind(
	at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(
	... 16 more
Why is that? Keep in mind (just in case) that the @Id field for B and C is a UUID field (don't know how this affects it but there you go).

Thanks in advance.


ebean, java, uuid

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