Esteban,

I didn't know about the #isVoyageRoot difference based on where was the method defined. 

I mean... if I define  

Member class>>#isVoyageRoot 

    ^true

why sould SingleMember answer false?

Do I have to redefine it to answer false in each of Member subclasses?

Regards!

Esteban A. Maringolo

2013/9/10 Esteban Lorenzano <estebanlm@gmail.com>

Hi,

what happens is that if you declare a "kind", you forces all elements to be of that specific class.
Solution is just not add that property:

<mongoDescription>
        ^VOMongoToManyDescription new
                attributeName: 'members';
                accessor: #members;

                "kind: Member; "                                                "<-- NO!"
                beLazy;
                yourself.

And same happens in the <mongoContainer> description in the top of your hierarchy... you must NOT declare a kind.
Also, if you want all members to go in just one collection. #isVoyageRoot has to be implemented in the top of the hierarchy and not in the subclasses

Member                                                                          "<-- #isVoyageRoot = true here!"
        SingleMember
        ComplexMember

what happens then is that voyage will create a collection and for each document it stores in it will also store the attribute '#instanceOf', which will be used to retrieve the correct object.

Esteban


what happens then is that

On Aug 31, 2013, at 12:53 AM, Esteban A. Maringolo <emaringolo@gmail.com> wrote:

> More or less, I have this working.
>
> In the Group class I have a description named:
> descriptionMembers
> <mongoDescription>
> ^VOMongoToManyDescription new
> attributeName: 'members';
> accessor: #members;
> kind: Member;
> beLazy;
> yourself
>
>
> And in the Member class I have
> descriptionGroups
> <mongoDescription>
> ^VOMongoToManyDescription new
>      attributeName: 'groups';
>      accessor: #groups;
>      kind: Group;
>      beLazy;
>      yourself
>
>
>
> But what if Member is an abstract class and the elements can be any of
> SingleMember or ComplexMember?, each one is stored in a separate
> collection in Mongo.
>
> If I do specify #kind: Member in my #descriptionMembers it won't work.
>
> Any ideas?
>
> Regards,
>
>
> Esteban A. Maringolo
>
>
> 2013/8/30 Esteban A. Maringolo <emaringolo@gmail.com>:
>> 2013/8/30 James Foster <Smalltalk@jgfoster.net>:
>>> It seems that I mistook the question for something easy enough for me to answer! Unfortunately, I don't have any knowledge of Voyage+MongoDB so can't really give the proper answer.
>>
>> Thanks anyway, it is a problem you'll never find in GemStone/S ;-)
>