LinuxQuestions.org - Ebean: exception when a field that is related to another entity is null

Hi!

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:

Code:

@Entity

public class A {



    @ManyToOne

    @JoinColumn

    private B b;

    @ManyToOne

    @JoinColumn

    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:

Code:

javax.persistence.PersistenceException: ERROR executing DML bindLog[] error[Unknown Types value.]

        at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(DmlBeanPersister.java:116)

        at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.insert(DmlBeanPersister.java:76)

        at com.avaje.ebeaninternal.server.persist.DefaultPersistExecute.executeInsertBean(DefaultPersistExecute.java:91)

        at com.avaje.ebeaninternal.server.core.PersistRequestBean.executeNow(PersistRequestBean.java:500)

        at com.avaje.ebeaninternal.server.core.PersistRequestBean.executeOrQueue(PersistRequestBean.java:530)

        at com.avaje.ebeaninternal.server.persist.DefaultPersister.insert(DefaultPersister.java:406)

        at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveVanillaInsert(DefaultPersister.java:377)

        at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveVanillaRecurse(DefaultPersister.java:361)

        at com.avaje.ebeaninternal.server.persist.DefaultPersister.saveRecurse(DefaultPersister.java:308)

        at com.avaje.ebeaninternal.server.persist.DefaultPersister.save(DefaultPersister.java:282)

        at com.avaje.ebeaninternal.server.core.DefaultServer.save(DefaultServer.java:1629)

        at com.avaje.ebeaninternal.server.core.DefaultServer.save(DefaultServer.java:1619)

        at com.avaje.ebean.Ebean.save(Ebean.java:526)

        at la.cps.warp.entity.AbstractEntity.save(AbstractEntity.java:71)

        at la.cps.warp.daemon.DaemonClient.processMessage(DaemonPort.java:293)

        at la.cps.warp.daemon.DaemonClient.getMessage(DaemonPort.java:186)

        at la.cps.warp.daemon.DaemonClient.run(DaemonPort.java:141)

Caused by: org.postgresql.util.PSQLException: Unknown Types value.

        at org.postgresql.jdbc2.AbstractJdbc2Statement.setNull(AbstractJdbc2Statement.java:1152)

        at org.postgresql.jdbc3.AbstractJdbc3Statement.setNull(AbstractJdbc3Statement.java:1490)

        at org.postgresql.jdbc4.AbstractJdbc4Statement.setNull(AbstractJdbc4Statement.java:81)

        at com.avaje.ebeaninternal.server.lib.sql.ExtendedPreparedStatement.setNull(ExtendedPreparedStatement.java:311)

        at com.avaje.ebeaninternal.server.type.DataBind.setNull(DataBind.java:62)

        at com.avaje.ebeaninternal.server.type.ScalarTypeUUID.bind(ScalarTypeUUID.java:70)

        at com.avaje.ebeaninternal.server.type.ScalarTypeUUID.bind(ScalarTypeUUID.java:31)

        at com.avaje.ebeaninternal.server.deploy.BeanProperty.bind(BeanProperty.java:663)

        at com.avaje.ebeaninternal.server.persist.dml.DmlHandler.bindInternal(DmlHandler.java:264)

        at com.avaje.ebeaninternal.server.persist.dml.DmlHandler.bind(DmlHandler.java:223)

        at com.avaje.ebeaninternal.server.deploy.id.ImportedIdSimple.bind(ImportedIdSimple.java:150)

        at com.avaje.ebeaninternal.server.persist.dmlbind.BindableAssocOne.dmlBind(BindableAssocOne.java:95)

        at com.avaje.ebeaninternal.server.persist.dmlbind.BindableAssocOne.dmlBind(BindableAssocOne.java:81)

        at com.avaje.ebeaninternal.server.persist.dmlbind.BindableList.dmlBind(BindableList.java:69)

        at com.avaje.ebeaninternal.server.persist.dml.InsertMeta.bind(InsertMeta.java:164)

        at com.avaje.ebeaninternal.server.persist.dml.InsertHandler.bind(InsertHandler.java:133)

        at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(DmlBeanPersister.java:98)

        ... 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.