Retrieving an array in Mithril

example.js

var Ids = [139502, 92769, 57443];

forecasts.model2 = function(Ids) {
	console.log(Ids);
	return m.request({
			method: 'GET',
			url: window.location.origin + '/api/',
			data: {
				reportIds: Ids
			}
		})
}
// this will send a request like this: GET /finviews/api/v0.1/allnormalised/?reportIds=139502&reportIds=92769&reportIds=57443
// and then will be able on the server side like this:
server.get(preUrl +'/allnormalised/', function(req, res) {
		// Need validation of req.query.reportIds
		console.log(req.query.reportIds)
		db.findAll({
				where: {
					ReportId: {
						$in: req.query.reportIds
					}
				}
			})
			.then(function(content) {
				res.json(content);
			})
			.catch(function(error) {
				console.log('Error retrieving normalised data: ', error);
				res.status(404).json(error)
			});
	});
// The drawback is everything is aggregated in one single array, so need to do data and recreate a tree structure 
	
// 	The other idea is mapping the array and doing as many requests as elements in the array, using m.sync which is like promise all
// 
var container = [];
m.sync(Ids.map(function(i) {
		return m.request({
			method: 'GET',
			url: window.location.origin + '/api/' + i
		})
	})).then(container)

// container is then an array of arrays, so still need to do some work on the data afterwards but at least separated already by Ids