'aggregate' does not exist in angular2-meteor

[kai-iak]

Installing package in angular2-meteor project does not work.

To reproduce:

1. Start with some code from the Socially tutorial
2. In Terminal Run:
   meteor npm install and meteor
3. Add package:
   meteor add meteorhacks:aggregate
4. Add the following code to server\publications\parties:

Meteor.publish('party', function(partyId: string) {
  var metrics = new Mongo.Collection('metrics');
var pipeline = [
  {$group: {_id: null, resTime: {$sum: "$resTime"}}}
];
var result = metrics.aggregate(pipeline);
  return Parties.find(buildQuery.call(this, partyId));
}); 

Error appears in the terminal:
server/imports/publications/parties.ts (13, 22): Property 'aggregate' does not exist on type 'Collection<{}>'.

[michaelb-01]

I'm having the same problem, did you resolve this in the end?

[GuofuHuang]

I have the same issue. +1

[vdavi]

I'm having the same issue.

[mhewett]

Add this to the file that uses the function:

/// < reference path="..path../declarations.d.ts" / >

And put this in the declarations.d.ts file:

declare module Mongo {

interface Collection {
    aggregate(args:any, filter:any): Array<any>;
}

}

[hsynaksu]

I am still getting this error with Angular 4.
I put the code you provided to declarations.d.ts file like this:
declare module Mongo {
interface Collection<T> {
aggregate(args:any, filter:any): Array<any>;
}
}

I had to add <T> for Typescript to not give error.
And I added /// <reference path="..path../declarations.d.ts" /> to the file I am using aggregate but
I am still getting "Property 'aggregate' does not exist on type" error.

[davinciagf]

With angular4 (4.2.0-rc.2) and meteor 1.5.1, I add the meteorhacks:aggregate package. Unfortunately I have the following issue

.aggregate is not a function

I completed the *.d.ts file with

declare module Mongo { interface Collection<T> { aggregate(args:any, filter:any): Array<any>; } }

and I added the reference to this file /// <reference path="..path../declarations.d.ts" />.

I used the aggregate module like this:

Meteor.publish('items', function(options:any) { return Results.aggregate( [ { $match: { score: { $gt: 80 } } }, { $count: "passing_scores" } ] )

[romiohasan]

meteorhacks:aggregate is working for my angular2-meteor project, so I put the details below :

export const ProductDB = new MongoObservable.Collection('product');

declarations.d.ts file :

declare module '*';

declare module Mongo {
interface Collection {
    aggregate(args:any, filter:any): Array<any>;
}
}

My server-side script where I am using the aggregate function:

/// <reference path="/declarations.d.ts" />

import { Meteor } from 'meteor/meteor';

if (Meteor.isServer) {

  Meteor.methods({

    'getMinPrice'() {
       
              var op = [
                  {
                    $group:
                    {
                      _id: "$shopID",
                      minPrice: { $min: "$price" }
                    }
                  }
                ]
              let result = ProductDB.collection.aggregate(op);
    }

  }) //end meteor.method

}
//end if server

Hope this helps :)