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From "Michael Gentry" <blackn...@gmail.com>
Subject Re: Null pointer in Cayenne 2.0.3 code
Date Fri, 31 Aug 2007 15:07:43 GMT
Hi Alex,

I'm curious as to why:

at ch.rodano.msbase.model.Patient.patientWithPKInContext(Patient.java:30)

is in your stack trace?  What does that method do?

Thanks,

/dev/mrg


On 8/31/07, Alexander Lamb (dev) <alamb@mac.com> wrote:
> Hello list,
>
> We are experimenting a Cayenne crash and wondering how to get around it.
>
> Here is the place of the crash:
>
> java.lang.NullPointerException
>         at org.apache.cayenne.query.BaseQueryMetadata.resolve
> (BaseQueryMetadata.java:97)
>         at org.apache.cayenne.query.SelectQuery.getMetaData(SelectQuery.java:
> 151)
>         at org.apache.cayenne.util.ObjectContextQueryAction.<init>
> (ObjectContextQueryAction.java:69)
>         at org.apache.cayenne.access.DataContextQueryAction.<init>
> (DataContextQueryAction.java:46)
>         at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1387)
>         at org.apache.cayenne.access.DataContext.performQuery
> (DataContext.java:1376)
>         at ch.rodano.msbase.model.Patient.patientWithPKInContext
> (Patient.java:30)
>
> I am not certain how to check the line were it crashed (looking at
> the code repository on-line does not probably garantee the line
> number is the same).
>
> We are simply trying to get a list of objects:
>
>      SelectQuery allPatients = new SelectQuery(Patient.class);
>      List patients = dataContext.performQuery(allPatients);
>
> Probably something is wrong with our model, but what? How to find out?
> The only different thing we did (which we did already previously) is
> that the primary key for Patient is a varchar (String) and is not
> hidden in the Java Class.
>
> Thanks for any hints (we regenerated everyting, etc... always the
> same crash)
>
> Alex

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