I use aggregation framework for group by of multiple fields as
{
_id:{_id:"$_id",feature_type:"$feature_type",feature_name:"$feature_name"},
features: { $push: "$features" }
}
it give result like
{_id:
{_id:1,feature_type:"Test",feature_name:"Tests"},
features:["23423","32423","2342342"]
}
but I want result like
{_id:1,feature_type:"Test",feature_name:"Tests",
features:["23423","32423","2342342"]
}
how can i acheve this using aggregration framework.
db.collection.aggregate([
{
$project: {
_id: "$_id._id",
feature_type:"$_id.feature_type",
feature_name:"$_id.feature_name",
features:1
}
}
])