Dmitry Mozheyko wrote:
>
> -----Original Message-----
> From: Marina Vatkina <Marina.Vatkina_at_Sun.COM>
> To: persistence_at_glassfish.dev.java.net
> Date: Wed, 07 Jun 2006 13:04:25 -0700
> Subject: Re: Empty references object
>
>
>>Dmitry Mozheyko wrote On 06/07/06 04:22,:
>>
>>>
>>>
>>>
>>>-----Original Message-----
>>>From: Marina Vatkina <Marina.Vatkina_at_Sun.COM>
>>>To: persistence_at_glassfish.dev.java.net
>>>Date: Tue, 06 Jun 2006 23:15:34 -0700
>>>Subject: Re: Empty references object
>>>
>>>
>>>
>>>>Dmitry,
>>>>
>>>>Can you try
>>>>a) to use the latest build?
>>>
>>>
>>> use Sun-distributed build "Java EE 5 SDK First Customer Ship for Solaris SPARC"
>>> Sun Java System Application Server Platform Edition 9.0 (build b48)
>>
>>Please try the latest build from GlassFish v2 Main branch on:
>>https://glassfish.dev.java.net/downloads/persistence/JavaPersistence.html
>>
>>>
>>>>b) change the inheritance strategy to the default (SINGLE_TABLE), and if needed
>>>>use java2db (auto DDL generation) to avoid changing your schema?
>>>
>>>
>>>I change inheritance strategy to SINGLE_TABLE and deploy with Derby database -
>>>
>>>SAME RESULT :(
>>
>>Close to impossible :(.
>>
>>Can you send us the code snippet that creates/changes B grade?
>
>
> I found my problem.
> I use bad find method:
>
> em.createQuery("select o from Grade o where o.id =" + id).getSingleResult();
>
> instead of
>
> em.find(Grade.class, id);
>
> But where i can read why search through em.createQuery() bring to such unexpected results?
Nowhere :(. It should work exactly the same way. Is it possible to create a
simple test case to reproduce this problem?
Please also try to set toplink log level to FINEST and check the generated SQL?
Are you using your application in Java EE or Java SE mode?
Do you map your entities to existing tables or are tables auto-generated for you
by our code?
thanks,
-marina
>
>
>>thanks,
>>-marina
>>
>>
>>>
>>>>Also, is @Id correctly defined on the VersionControl class?
>>>
>>>
>>>
>>>@Entity
>>>@Inheritance(strategy=InheritanceType.JOINED)
>>>public class VersionControl implements Serializable {
>>>
>>> @Id
>>> @GeneratedValue(strategy = GenerationType.AUTO)
>>> private Long id;
>>>...
>>>
>>>
>>>
>>>>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?
>>>>>>>>
>>>>>>
>>>