you have different constructions:
{ $gt: { "number_field": 42 } }
and so on... always with dictionaries (bah, json structs).
as a query language it kinda sucks... but well... is how it is :)
On Jul 4, 2013, at 7:34 PM, Stéphane Ducasse <stephane.duca...@inria.fr> wrote:
> Ok but how do I map conceptual a query to a dictionary
>
> Do I guess right that there is an exact match
>
> selectOne: { id -> 10} asDictionary
>
> will match id = 10
>
> Now we can only do exact mathc?
>
> name matches: 'stef*'
>
>
> On Jul 4, 2013, at 6:04 PM, Esteban A. Maringolo <emaring...@gmail.com> wrote:
>
>> Stef,
>>
>> You're asking the other Esteban, but having used Voyage and Mongo I
>> think I can answer this.
>>
>> Mongo receives a JSON object to do all the query filtering. For a
>> simple lookup it is has a simple structre, as the query gets more
>> complex it gets esoteric as well (with "special" MongoDB keys in the
>> format of "$key").
>>
>> Because the simplest map we have to a JSON Object is the Dictionary, I
>> guess that's why it ends up being converted to a Dictionary, which in
>> turn gets converted to JSON and/or BSON.
>>
>> Regards,
>>
>> Esteban A. Maringolo
>>
>>
>> 2013/7/4 Stéphane Ducasse <stephane.duca...@inria.fr>:
>>>
>>> On Jul 4, 2013, at 2:58 PM, Esteban Lorenzano <esteba...@gmail.com> wrote:
>>>
>>> Hi :)
>>>
>>> can you check if you have the "MongoQueries" package installed?
>>>
>>> cheers,
>>> Esteban
>>>
>>> ps: please notice that in anycase you will not be able to execute
>>>
>>> [ :each | each name first = $X ]
>>>
>>> because the MongoQueries package just translates the block into a
>>> mongo-query which is a dictionary (a JSON expression). But you will found
>>> some ways to help you, some special keywords like #in: and #where: (you can
>>> see how they work in the tests)
>>>
>>>
>>> esteban
>>> how a dictionary is used to work as a block for a query?
>>> Can you explain because I would have thought that the first line did not
>>> work and the second would work.
>>>
>>> Stef
>>>
>>>
>>>
>>>
>>> On Jul 4, 2013, at 2:17 PM, Bernat Romagosa <tibabenfortlapala...@gmail.com>
>>> wrote:
>>>
>>> Hi!
>>>
>>> I realize probably only Esteban will be able to answer, but I prefer to
>>> write to the list so the mail is logged and other people can benefit from
>>> it.
>>>
>>> I'm trying to use blocks as arguments for #selectOne: and #selectMany:, but
>>> it doesn't seem to work. Here's my code:
>>>
>>> MyClass selectOne: { #name -> 'Some name' } asDictionary.
>>> MyClass selectOne: [ :each | each name = 'Some name' ].
>>>
>>>
>>> The first one works, but the second one raises a VOMongoConnectionError.
>>>
>>> Also:
>>>
>>> MyClass selectMany: { #name -> 'Some name' } asDictionary.
>>> MyClass selectMany: [ :each | each name = 'Some name' ].
>>>
>>>
>>> The first does work, the second one doesn't, which prevents me from writing
>>> more useful stuff like:
>>>
>>> MyClass selectMany: [ :each | each name first = $P ].
>>>
>>> Any idea why this could be failing? I've the latest stable version loaded
>>> via:
>>>
>>> Gofer it
>>> url: 'http://smalltalkhub.com/mc/estebanlm/Voyage/main';
>>> package: 'ConfigurationOfVoyageMongo';
>>> load.
>>> (Smalltalk at: #ConfigurationOfVoyageMongo) load.
>>>
>>> Thanks! :)
>>>
>>> Bernat.
>>>
>>> --
>>> Bernat Romagosa.
>>>
>>>
>>>
>>
>
>
