Nested JSON output from mongodb via Get - mongodb

Question

I have some status-Data from a bunch of devices stored in mongoDB and I like to aggregate via mongoose some simple statistics pending on input variables e.g. input about timespan (start to end).
Plane Dataset in mongoDB looks somehowe like this:
{
"_id":"5d65b4a9cef78a5c987b2224",
"Date":"2019-08-01T00:00:00.000Z",
"Id":9,
"StandingNoMovement":21.9,
"DrivingHours":0.4,
"StandingWithEngineOn":1.6
},
{
"_id":"5d65b4a9cef78a5c987b2225",
"Date":"2019-08-02T00:00:00.000Z",
"Id":9,
"StandingNoMovement":19.2,
"DrivingHours":2.3,
"StandingWithEngineOn":2.3,
}
and I need to create a GET for an API with the structure of
[{"Id":9,
"DrivingHours":
{"Total":276.9,"Day":0.0,"ThisWeek":0.0,"ThisMonth":0.0},
"StandingNoMovement":
{"Total":678.4,"Day":0.0,"ThisWeek":0.0,"ThisMonth":0.0},
"StandingWithEngineOn":
{"Total":521.4,"Day":0.0,"ThisWeek":0.0,"ThisMonth":0.0}]
So fare, I only managed to aggregate some not nestet statistics in mongoose like:
const aggReport = mongoose.model('aggReport', aggReportingSchema);
aggReport.aggregate([
{ $match:
{ Id : req.params.Id ,'Date': { $gte: start, $lt: end}
}
},
{ $group:
{ _id: null,
'DrivingHours': {$sum: '$DrivingHours'},
'StandingWithEngineOn': {$sum: '$StandingWithEngineOn'},
'StandingNoMovement': {$sum: '$StandingNoMovement'}
}
}])
on the Schema
export const aggReportingSchema = new Schema({
Id:{ type: Number},
Date:{ type: Date},
StandingNoMovement:{ type: Number},
StandingWithEngineOn:{ type: Number},
},{ collection : 'status_daily' });
How to get the nested statistics as they look that simple to me?

Answer 1

I just switched now to a total different approach, as I got the impression, that there are no proper and usable solutions (perhaps with good reasons) to dynamically create such a API. So now I store all the date precalculated in the mondodb and I am using express and node just to call the necessary dataset.