Sorry to revive this old topic, but I still see this problem in
1.3.3.1
I get it in the following scenario:
class Parent {}
class Child {
private Key id;
private Parent mother;
private Parent father
}
Error message:
Child has multiple relationship fields of type Parent: father and
mother. This is not yet supported.
John, are you saying that Twig, Objectify, SimpleDS, Slim3 and Siena
don't have this problem? If yes, which one can you recommend? I am a
little bit reluctant to use anything that makes your code tied to GAE.
The beauty of JDO/JPA is that I can use the same code and deploy
anywhere else. But if that is my only option to get around this
limitation I probably would use Twig, Objectify ...
Thanks,
Johannes
On Mar 28, 9:25 am, John Patterson <jdpatter...@gmail.com> wrote:
> There are alternatives: Twig, Objectify, SimpleDS, Slim3, Siena. Take
> your pick and get your app working today.
>
> On 28 Mar 2010, at 21:47, Trung wrote:
>
>
>
> > Hi GAE team,
>
> > Any workarounds for this issue?
>
> > Thanks
>
> > On Feb 14, 8:55 am, Payam <pmoghad...@gmail.com> wrote:
> >> The problem is still not solved.
> >> Although you can "persist" an object with multiple relations of the
> >> same type. When you actually query the object, the retrieved object
> >> has duplicates for the multiple relations.
> >> As in, if I were to persist instances A, B inside C. When I query for
> >> C, both objects retrieved will be A. There will be no B.
>
> >> This is a serious bug!
>
> >> On Jan 26, 4:54 pm, oth <other...@gmail.com> wrote:
>
> >>> Michael,
>
> >>> In your jdoconfig.xml file add this entry:
>
> >>> <property
> >>> name="datanucleus.appengine.allowMultipleRelationsOfSameType"
> >>> value="true"/>
>
> >>> Thanks
>
> >>> On Jan 26, 3:12 pm, Michael Shtelma <mshte...@gmail.com> wrote:
>
> >>>> Hi all,
>
> >>>> I am also experiencing this problem on GAE 1.3.0.
> >>>> Using multipleRelationsOfSameTypeAreErrors helps not in all cases,
> >>>> when I am trying to read such entities I get mentioned exception.
> >>>> Are the any solution for the 1.3.0 ?
>
> >>>> Thanks,
> >>>> Michael
>
> >>>> On Jan 21, 9:20 am, cowper <iamco...@gmail.com> wrote:
>
> >>>>> Hi,
> >>>>> I have a similar issue with 1.3.0 however it arises when the
> >>>>> types
> >>>>> are the same and not related to inheritance of any type.
>
> >>>>> The work around suggested doesn't seem to work. Is the workaround
> >>>>> valid for 1.3.0?
>
> >>>>> thx,
>
> >>>>> Conor
>
> >>>>> On Dec 4 2009, 9:52 pm, "Max Ross (Google)" <maxr
>
> >>>>> +appeng...@google.com> wrote:
> >>>>>> SDK 1.2.8 contains a new check that detects if one of your JDO
> >>>>>> or JPA model
> >>>>>> objects has two relationship fields of the same type. For
> >>>>>> example:
>
> >>>>>> class A {
> >>>>>> List<B> bList;
> >>>>>> List<B> anotherBList;
>
> >>>>>> }
>
> >>>>>> Unfortunately I was a little too aggressive with this check, so
> >>>>>> the
> >>>>>> following also run afoul of the check:
>
> >>>>>> abstract class B {}
>
> >>>>>> class C extends B {}
> >>>>>> class D extends B {}
>
> >>>>>> class A {
> >>>>>> List<C> cList:
> >>>>>> List<D> dList;
>
> >>>>>> }
>
> >>>>>> If you get an exception that says
>
> >>>>>> Class XXX has multiple relationship fields of type YYYY. This
> >>>>>> is not yet
> >>>>>> supported.
>
> >>>>>> and your class hierarchy resembles the one above, you can
> >>>>>> disable this check
> >>>>>> by with the following config property:
>
> >>>>>> <property
> >>>>>> name="datanucleus.appengine.multipleRelationsOfSameTypeAreErrors"
> >>>>>> value="true"/>
>
> >>>>>> We'll get this fixed shortly.
>
> >>>>>> Sorry for the trouble,
> >>>>>> Max
>
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