Dmitry,
Can you try
a) to use the latest build?
b) change the inheritance strategy to the default (SINGLE_TABLE), and if needed
use java2db (auto DDL generation) to avoid changing your schema?
Also, is @Id correctly defined on the VersionControl class?
thanks,
-marina
Dmitry Mozheyko wrote:
>
>
> -----Original Message-----
> From: Marina Vatkina <Marina.Vatkina_at_Sun.COM>
> To: persistence_at_glassfish.dev.java.net
> Date: Tue, 06 Jun 2006 13:48:49 -0700
> Subject: Re: Empty references object
>
>
>>Dmitry,
>>
>>Can you please provide more details? What does it mean "on the 'B-object-place'
>>i see object with all fields = null"?
>
>
> Yes, all field including primary key are == null, and "findAll" method of Grade-class return collection with grades, but on referenced place stay "empty"(with all nulled fields) object.
>
>
>>What fields does your Grade object have?
>
>
> All inherited from VersionControl(
> Long id;
> @Temporal(TemporalType.TIMESTAMP)
> Date versionId;
> String editorName;
> Boolean isActual;
> Long objectId;
> );
>
> and one self-own field
>
> String name;
>
>
>>Is VersionControl also an entity or a MappedSuperClass?
>
>
> Also entity:
> @Entity
> @Inheritance(strategy=InheritanceType.JOINED)
>
>
>>The restart that you perform cleans up the in-memory cache of the objects
>>accessed by this PU before.
>
>
> Disable/Enable enterprise application from AdminConsole also helped.
>
>
>>Do you have any ideas/clues what could've caused
>>this instance to have all fields null in memory?
>
>
> NO! I don't have code that can do this.
>
> May be i forget any important annotations with this intricate inheritance?
>
>
>
>>thanks,
>>-marina
>>
>>Dmitry Mozheyko wrote:
>>
>>>-----Original Message-----
>>>From: "Gordon Yorke" <gordon.yorke_at_oracle.com>
>>>To: "mozheyko_d_at_mail.ru" <mozheyko_d_at_mail.ru>
>>>Date: Fri, 26 May 2006 09:04:07 -0400
>>>Subject: RE: Empty references object
>>>
>>>
>>>
>>>>Hello Dmitry,
>>>> Can you send the code that performs the update? Can you provide the source for the Grade class as well? How are the PK's structured?
>>>
>>>
>>>####### Code for update grade of Pupil #############
>>> ...
>>> Long gradePK = new Long(<some received value>);
>>> Grade grade = em.find(Grade.class, gradePK);
>>> pupil.setGrade(grade);
>>> em.persist(pupil);
>>> ...
>>>
>>>############ PK of Grade entity is enherited from parent class
>>>
>>>...
>>>@Entity
>>>@Inheritance(strategy=InheritanceType.JOINED)
>>>public class MyEntityParent implements java.io.Serializable {
>>>
>>> @Id
>>> @GeneratedValue(strategy = GenerationType.AUTO)
>>> private Long id;
>>>...
>>>
>>>@Entity
>>>public class Grade extends VersionControl {
>>>...
>>>
>>>
>>>
>>>
>>>>--Gordon
>>>>
>>>>-----Original Message-----
>>>>From: Dmitry Mozheyko [mailto:mozheyko_d_at_mail.ru]
>>>>Sent: Friday, May 26, 2006 4:09 AM
>>>>To: persistence_at_glassfish.dev.java.net
>>>>Subject: Empty references object
>>>>
>>>>
>>>>I use glassfish b48.
>>>>I need two classes with unidirectional ManyToOne relation:
>>>>
>>>>Pupil -> Grade
>>>>
>>>>###### Pupil.java ########
>>>>...
>>>>@Entity
>>>>public class Pupil extends Person {
>>>> ...
>>>> @ManyToOne(targetEntity=Grade.class)
>>>> private Grade grade;
>>>> ...
>>>>}
>>>>
>>>>When i change Pupil-instance grade attribute from 'A' to 'B' grade attribute in pupil instance, database updates successfully, but grade attribute of Pupil instance contents Grade-class instance with all NULL fields, and
>>>>em.createQuery("select o from Grade o where order by o.name").getResultList();
>>>>returns Collection with all Grade objects, but on the 'B-object-place' i see object with all fields = null.
>>>>i.e.
>>>>
>>>>#########################
>>>>id name
>>>>"1" "A"
>>>>"" ""
>>>>"3" "C"
>>>>##########################
>>>>
>>>>I tried to run on various platforms and glassfish versions, on JavaDB and PostgreSQL database, various CascadeType's - same result.
>>>>
>>>>When i redeploy my application(or restart server;-)) all is ok.
>>>>
>>>>When is my problem?
>>>>
>>