If an object does not have a relationship set Cayenne returns an exception.
Would the best practice be to store an id instead and build a custom
getParentObject method using a query? All objects without relationships might
e.g. have the relationship id set to 0.
Example
public Object getParent(){
// Is parentId set to 0? Return null;
// Else query parent row using parentId;
}
----- Original Message -----
From: "Mike Kienenberger" <mkienen..laska.net>
To: "Orion Fields" <ofield..martserv.com>
Cc: <jsaa..eb.de>; <cayenne-user@objectstyle.org>
Sent: Friday, August 06, 2004 11:00 PM
Subject: Re: Testing for Valid Objects
> =?iso-8859-1?Q? J=FCrgen=20Saar ?= <jsaa..eb.de> wrote:
> > I use the actual version of cayenne
> > in difference to 1.0 where silently an empty DataObject was returned
> > reading the empty relation-object now a CayenneException is thrown.
>
> Thanks for the reminder. I thought this problem sounded familiar.
>
> Take a look at this from Cayenne Release Notes 1.1 B2:
>
> > - DataObject.resolveFault() will now throw an exception if the underlying
> DB row does not exist
> > follow this link for further discussion:
> > http://objectstyle.org/cayenne/lists/cayenne-user/2004/07/0124.html
>
> According to this, 1.1B2 started throwing Exceptions in addition to marking
> the object transient.
>
> Also covered in
> http://objectstyle.org/jira/secure/ViewIssue.jspa?key=CAY-132, so you may
> want to vote for this issue if it's important to you and you don't like the
> workaround.
>
> Sounds like it's a bug that'll be fixed after 1.1 (so that null is returned
> instead).
>
> -Mike
>
>
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