[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-2363) Hibernate is returning zero for the ID of a persistent object

[Steve Ebersole (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole closed HHH-2363.
-------------------------------

      Assignee: Steve Ebersole
    Resolution: Rejected

As specified in the documentation, classes (and their methods)  which you want to have lazy loaded cannot be final.  Your test AbstractNamed has both getId() and setId() defined as final...

> Hibernate is returning zero for the ID of a persistent object
> -------------------------------------------------------------
>
>                 Key: HHH-2363
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2363
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.0.ga
>         Environment: Hibernate 3.2.1 GA running on SuSE Linux
> MySQL 4.1.13
> java version "1.5.0_06"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
> Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)
>            Reporter: Archie Cobbs
>            Assignee: Steve Ebersole
>         Attachments: TRAK-3910.zip
>
>
> I have two classes, {{Patient}} and {{Room}}, where {{Patient}} has a FK many-to-one reference to {{Room}}, representing a room assignment.
> Both classes use a Java {{long}} field named "id" as their identifier.
> When I create a Session and find a Patient with a room assignment, the Patient's identifier is correct but the Room's identifier, when accessed via {{patient.getAssignedRoom().getId()}}, is ZERO. However, in the database the value is one and {{session.getIdentifier(patient.getAssignedRoom())}} also returns one, in contradiction.
> A simple reproducible test case will be attached. Instructions:
> # Edit {{doit.sh}} and set {{HIBERNATE_DIR}} to point to an unpacked {{hibernate-3.2.0.ga.tar.gz}} directory
> # Set {{MYSQL_CONNECTOR_JAVA}} to point to {{myslq-connector-java.jar}}
> # Set {{DATABASE_USERNAME}} and {{DATABASE_PASSWORD}} if needed
> # Run {{doit.sh}}.
> The output I get at the end is this:
> {noformat}
> 2037 [main] INFO org.hibernate.cache.StandardQueryCache  - starting query cache at region: org.hibernate.cache.StandardQueryCache
> Hibernate: select this_.id as id0_0_, this_.assignedRoom as assigned2_0_0_, this_.name as name0_0_, this_.medicalRecordNumber as medicalR4_0_0_ from Patient this_ where this_.medicalRecordNumber=?
> Hibernate: select room0_.id as id1_0_, room0_.name as name1_0_ from Room room0_ where room0_.id=?
> 2195 [main] INFO Main  - patient=Patient[Fred Example] patient.assignedRoom=Room[Room 101]
> 2196 [main] INFO Main  - patient.id=1
> 2196 [main] INFO Main  - patient.assignedRoom.id=0
> 2196 [main] ERROR Main  - WTF? ID OF ROOM IS ZERO!
> 2196 [main] INFO Main  - patient.assignedRoom.id=1
> {noformat}
> Note the line {{patient.assignedRoom.id=0}} ... see the corresponding code in {{Main.java}}.

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