node.js - Recover an object requested with MongoDB Driver on node JS -

i try recover object mongo db database, in node js file , doesn't work.

in file called db.js , have made following code :

var mongoclient = require('mongodb').mongoclient;  module.exports = {   findincoladsl: function() {     return mongoclient.connect("mongodb://localhost/sdb").then(function(db) {       var collection = db.collection('scollection');        return collection.find({"type" : "adsl"}).toarray();     }).then(function(items) {       return items;     });   } }; 

and, try use in file server.js :

var db = require(__dirname+'/model/db.js');  var collection = db.findincoladsl().then(function(items) {  return items; }, function(err) {   console.error('the promise rejected', err, err.stack); });  console.log(collection); 

in result have "promise { }". why ?

i want obtain object database in order manipulate in others functions situated in server.js file.

then then function called on promises returns promise. if value returned within promise, object promise evaluates promise resolves value returned. take @ this question full explanation of how works.

if want verify code getting items, have restructure code account the structure of promises.

var db = require(__dirname+'/model/db.js');  var collection = db.findincoladsl().then(function(items) {  console.log(items);  return items; }, function(err) {   console.error('the promise rejected', err, err.stack); }); 

that should log items after retrieved database.

promises work way make working asynchronously more simple. if put more code below collection code, run @ same time database code. if have other functions within server.js file, should able call them within body of promises.

as rule, remember promise return promise.