The version is being left as null - we are never setting it.
Thanks,
Ellen
Gordon Yorke wrote:
>Hello Ellen,
> In the constrctor of FileCategory is version being initialized to new Long(X) or being left as null?
>--Gordon
>
>-----Original Message-----
>From: Ellen Kraffmiller [mailto:ekraffmiller_at_hmdc.harvard.edu]
>Sent: Thursday, September 28, 2006 10:27 AM
>To: persistence_at_glassfish.dev.java.net
>Subject: Re: Trting to add new child entity; getting
>OptimisticLockException
>
>
>Hi Gordon,
>I am working with Gustavo on this problem so I thought I'd answer your
>questions. The version field is defined as:
>
> @Version
> private Long version;
>(with normal getters and setters)
>
>We are using SostgreSQL, and the database column is version, int8.
>
>Thanks,
>Ellen
>
>Gordon Yorke wrote:
>
>
>
>>Hello Gustavo,
>> What is the version field in FileCategory being initialized to? What type is the version field?
>>--Gordon
>>
>>-----Original Message-----
>>From: gdurand_at_hmdc.harvard.edu [mailto:gdurand_at_hmdc.harvard.edu]
>>Sent: Wednesday, September 27, 2006 5:57 PM
>>To: persistence_at_glassfish.dev.java.net
>>Subject: Trting to add new child entity; getting OptimisticLockException
>>
>>
>>Hi,
>>
>>I'm am trying a very simple example and am getting a problem
>>(I am using glassfish v2 milestone 1):
>>
>>Our DB has a Study entity which has a one to many relationship
>>with a FileCategory entity.
>>
>>When I try to add a FileCategory to an existing study:
>>
>> Collection categories = study.getFileCategories();
>>
>> FileCategory c = new FileCategory();
>> c.setName( "test" );
>>
>>
>> c.setStudy(study);
>> categories.add(c);
>>
>> em.merge(study);
>>
>>I am getting:
>>
>>Exception Details:
>>oracle.toplink.essentials.exceptions.OptimisticLockException
>> Exception Description: The object
>>[edu.harvard.hmdc.vdcnet.study.FileCategory_at_1f1c748] cannot be merged
>>because it has changed or been deleted since it was last read.
>>{3}Class> edu.harvard.hmdc.vdcnet.study.FileCategory
>>
>>
>>
>>Any ideas why this is happening, since the FileCategory doesn't exist
>>in the first place? (I have seen an example in the O'Reilly book that
>>pretty much does just this)?
>>
>>Thanks,
>>Gustavo
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>