Mongojs get all database indexes and map them to their collection in an object

getAllDatabaseIndexes.js

"use strict";

var db = require('../db');
var indexes = {};

db.getCollectionNames(function (err, collections) {
  for (var i=0; i<collections.length; i++) {
    indexes[collections[i]] = [];
    (function (i) {
      db.collection(collections[i]).getIndexes(function (err, collectionIndexes) {
        for (var j=0; j<collectionIndexes.length; j++) {
          indexes[collections[i]].push(collectionIndexes[j].name);
        }
      })
    })(i);
  }
});

module.exports = indexes;

Should bring db connection inside this gist