MongoDB aggregation on Loopback

Question

How do I obtain the sum of a Loopback PersistedModel?

There does not seem to be a documentation on how to achieve that.

If possible I would like to avoid ha

Answer 1

Aggregate query with loopback

Products.getDataSource().connector.connect(function(err, db) {
     var collection = db.collection('Products');
        collection.aggregate(
       [{ $match: { "productCode" : "WIN10-NoOS" } }]
        ).toArray(function(err,servicesData){
              if(err){

               }else{
             cb(null,servicesData);
           }

         });
    });