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From Andrus Adamchik <and...@objectstyle.org>
Subject Re: FaultFailureException
Date Fri, 23 Jun 2006 07:29:27 GMT
> Maybe it's easier to create a dummy partner so that the  
> relationship is not null.

That'll probably work too.

Andrus

On Jun 22, 2006, at 10:54 PM, Lothar Krenzien wrote:
> Hi Andrus,
>
> thanks a lot for your answer ! I think it's clear now.
>
> Maybe it's easier to create a dummy partner so that the  
> relationship is not null.
>
>
> Lothar
>
>> I think I might know the cause.
>>
>> tblPerson -> tblPartner relationship is a one-to-one where one side
>> is not a PK (tblPartner.personId). IIRC we had unresolved Jira issue
>> (s) related to nullable unique to-one FK ("unique" implies that the
>> relationship that looks like one-to-many is in fact one-to-one; while
>> "nullable" part is what causes the problem with faults and other
>> things).
>>
>> One suggested workaround is to map the relationship as many-to-one
>> and create cover methods if you want to treat it as one-to-one. This
>> should work smoothly.
>>
>> Wonder if this is related to the earlier exceptions as well?
>>
>>
>>
>> On Jun 22, 2006, at 7:12 PM, Andrus Adamchik wrote:
>>
>>> The error happens mostly when cayenne tries to resolve the relation
>>> tblPerson -> tblPartner. It's  an 1:1 relation but the relation can
>>> be null.
>>
>>
>>> DataContext context = getDaoContext(ctx);
>>> TblAccount account;
>>> Expression expr = ExpressionFactory.matchExp("loginName",  
>>> loginname);
>>> List<TblAccount> accountList = context.performQuery(new SelectQuery
>>> (TblAccount.class, expr));
>>> return accountList (0);
>>>
>>>
>>> and then :
>>>
>>> if (account.getTblPerson().getTblPartner() != null) {
>>>  TblPartner partner = account.getTblPerson().getTblPartner();
>>>  partner.getName() ; <----- here the exception happens
>>> }
>>> else {
>>>  ...
>>> }
>>
>
>
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