Array object namespace meteor [duplicate] - arrays

Question

This question already has answers here:
How to use Meteor methods inside of a template helper
(6 answers)
Closed 7 years ago.
it seems like i can't display an array for my namespace
{{#each reports}}
{{_id}}
{{/each}}
my code looks like this
server method.
reports : function(){
var pipeline = [
{$group:{_id: "$activity.destination.name","count":{$sum:1 } } },
{$match:{_id:{$ne:null} }}];
var result = Reports.aggregate(pipeline);
console.log(result);
return result;
from helper
reports: function(){
Meteor.call("reports",function(err, data) {
arr =[];
data.forEach(function(doc){
arr.push(doc);
});
console.log(arr);
return arr;
});
}
in the browser console, the response looks like this
[Object]
0:Object
_id: "Balance Sheet and P&L Rates - Current Year"
count: 2 ..etc
im not sure if its the namespace or its an object array of non-cursors. but it doesn't give me an error. im not sure if what im doing is correct.

Answer 1

Meteor.call returns immediately, and the callback is called once the data is back from the server.
Your template is referencing a helper which in turn calls the server method then immediately returns nothing at all. The helper's callback, when it returns, cannot return the data to the template.
In your case you should:
Create a collection for your reports.
Subscribe to the reports collection when visiting the page in question (this is typically done from a route controller if you're using Iron Router.
Create a publish function to publish your reports to the collection.
The last point isn't as straightforwards as usual since you're aggregating the results, but it's still possible with something like this (untested):
Meteor.publish('reports', function(options) {
var sub = this;
var pipeline = [
{$group:{_id: "$activity.destination.name","count":{$sum:1 } } },
{$match:{_id:{$ne:null} }}];
var result = Reports.aggregate(pipeline);
var arrayLength = reports.length;
for (var i = 0; i < arrayLength; i++) {
var report = reports[i];
sub.added('reports', report._id, report);
}
})
Then you can just call find on the Reports collection from your helper:
reports: function() {
return Reports.find()
}
Or else return the that same cursor as part of your data context in your Iron Router controller and use the result directly in your template.