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Problem accessing groupes values with mongodb


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Hi everybody,

I'm a newcommer to Jaspersoft. I have a query in jaspersoft Studio (with a mongodb datasource) like this:

{   runCommand: {        aggregate : 'Fait',        pipeline : [                {                        $group : {                                _id : {pref:'$prefixSociete',typ:'$typeOperation'},                                total: {                                        $sum : '$montant'                                }                        }                },                {                        $sort : {                                _id:1                        }                }        ]}}[/code]

Accessing "_id" with a text field (with: $F{_id) gives me something like that:


So far, so good! I would be glad to access the values behind the field named "$prefixeSociete" or even other fields comming from the collection named "Fait". Does anyone have an idea on how I could achieve this?

Thanks for helping in evaluating Jaspersoft as the apropriate solution for my company.

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