how to use aggregate function in meteor

Question

I\'m working on the following document

{
\"_id\" : 12,
\"firstName\" : \"wer\",
\"People\" : [ 
    {
        \"uuid\" : \"123\",
        \"name\" : \"sugun\         


        

Answer 1

You need to add a package to expose the aggregate feature:

meteor add monbro:mongodb-mapreduce-aggregation

Then you can use the code like normal:

var MyCollection = new Mongo.Collection('metrics');
var pipeline = [
  {$group: {_id: null, resTime: {$sum: "$resTime"}}}
];

var result = MyCollection.aggregate(pipeline);

Just a couple of things to note, this works best on the server side. For docs to use it on the client side a fork of the package is needed, check the package's docs: https://atmospherejs.com/monbro/mongodb-mapreduce-aggregation