> Am 09.03.2016 um 09:35 schrieb Sabine Manaa <manaa.sab...@gmail.com>:
>
> you are right.
>
> I tried to introduce a parent class "Numbers" as superclass of One, Two and
> Three and defined the relation like this
>
> mongoLink
> <mongoDescription>
> ^ VOMongoToOneDescription new
> attributeName: 'link';
> kind: Numbers;
> yourself
>
> But it did not work.
>
> I get a system error...I don't have so much time but I keep thinking and I am
> interested in your results.
I think you can always expect problems when using magritte relationships that
aren't homogenous. Voyage is capable of finding objects that are not of the
same class. But they need to be in the same inheritance chain. Meaning if you
request Numbers than all objects being found need to be kindOf Numbers. The
second aspect is that the collection in mongo is derived from the class name so
it cannot work because queries over multiple collections are not possible in
mongo. You need to do
<mongoContainer>
^ VOMongoContainer new
collectionName: 'Numbers';
yourself
in all subclasses of Numbers. This way every object is stored in the same
collection, a query will find them all and will istantiate them because they
have the right relationship.
Norbert
>
> My model is so, that I always have the same types in one relationship, so it
> did not occur in my project.
>
> 2016-03-08 19:58 GMT+01:00 Sabine Manaa <manaa.sab...@gmail.com
> <mailto:manaa.sab...@gmail.com>>:
> I don't think it is a bug, there is missing the description of the
> relationship between one and two:
> If I define the following method, it works.
>
> Thomasso, do you know this documentation?
>
> https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/ws/book-result/Voyage/Voyage.pdf
>
> <https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/ws/book-result/Voyage/Voyage.pdf>
>
>
> One class>>mongoLink
> <mongoDescription>
> ^ VOMongoToOneDescription new
> attributeName: 'link';
> kind: Two;
> yourself
>
> regards
> Sabine
>
> 2016-03-08 16:31 GMT+01:00 EstebanLM [via Smalltalk] <[hidden email]
> <http://user/SendEmail.jtp?type=node&node=4883306&i=0>>:
> Hi Tommaso,
>
> that might be a bug… which version are you using?
> if latest, can you fill a bug here:
> https://github.com/estebanlm/voyage/issues
> <https://github.com/estebanlm/voyage/issues> (so I do not forget it)?
>
> thanks,
> Esteban
>
>> On 08 Mar 2016, at 16:25, Tommaso Dal Sasso <[hidden email]
>> <http://user/SendEmail.jtp?type=node&node=4883253&i=0>> wrote:
>>
>> Hi,
>>
>> thanks for your answer, I also tried with One>>mongoContainer, but sadly
>> that does not solve the issue.
>> I think it works in your case because you have the One object cached from
>> the previous query, but if you inspect the "link" field, it should be nil.
>>
>> If you reset the repository connection, it should give the exception again.
>>
>> I'll keep trying :-)
>> Tommaso
>>
>>
>>
>> On 07/03/16 14:07, Sabine Manaa wrote:
>>> Hi Tommaso,
>>>
>>> you did not define a One>>mongoContainer. I defined it and then it seems to
>>> work.
>>>
>>> Regards
>>>
>>> 2016-03-06 1:42 GMT+01:00 Tommaso DS [via Smalltalk] <<a
>>> moz-do-not-send="true"
>>> href="x-msg://133/user/SendEmail.jtp?type=node&node=4882948&i=0"
>>> target="_top" rel="nofollow" link="external" class="">[hidden email]>:
>>> Hi,
>>>
>>> I am having troubles with Voyage and Mongo.
>>> I have some Classes that I save in Mongo, say "One", "Two", and "Three".
>>> All three classes and are voyage roots, so the objects from each class
>>> are stored in different collections.
>>> One objects has a reference to Two or Three objects.
>>>
>>> The problem arises when I use a Magritte description and define a Mongo
>>> container to optimize the storage: since each class is stored in its own
>>> collection, there is no point in storing the #instanceOf attribute as well.
>>>
>>> Two>>mongoContainer
>>> <mongoContainer>
>>>
>>> ^ VOMongoContainer new
>>> kind: Two;
>>> yourself
>>>
>>> If I add this method, when I try to load an object One, I get the
>>> exception: "KeyNotFound: key #nil not found in SystemDictionary".
>>> It looks like Voyage is not able to understand the type of the objects
>>> stored in the collection Two, when loaded from a reference.
>>>
>>> Am I missing something? Do I need to specify something more to make it
>>> work?
>>>
>>> I reproduced the scenario in an image that can be downloaded here:
>>> https://dl.dropboxusercontent.com/u/11506662/VoyageMongo-Link-Test.zip
>>> <https://dl.dropboxusercontent.com/u/11506662/VoyageMongo-Link-Test.zip>
>>>
>>> Do you have any idea? Should I report this on the issue tracker?
>>>
>>> Thanks!
>>> Tommaso
>>>
>>>
>>>
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