Mongoose connect but doesn't record documents - angularjs

Question

I am working on a MEAN application and I am trying to execute a job every X seconds that updates my DB. But, as first sprint, I am trying to launch a couple of queries just when I start express server (one for populate and another to list). Here is my code:
// set up ========================
var express = require('express');
var app = express(); // create our app w/ express
var mongoose = require('mongoose'); // mongoose for mongodb
[....]
var Schema = mongoose.Schema;
// configuration =================
// connect to mongoDB database on localhost
var connection = mongoose.createConnection('mongodb://localhost/dv_db_admin');
connection.on('error', console.error.bind(console, 'connection error:'));
connection.once('open', function () {
console.info('connected to database dv_db_admin')
});
[...express stuff...]
// define model =================
var CountrySchema = new Schema({
name : String,
icaoCode : String,
documents : [String]
});
var Country = mongoose.model('Country', CountrySchema);
var country = new Country({
name : 'Afghanistan',
icaoCode : 'AFG',
documents : []
});
country.save(function(err, country) {
if (err) console.log("Error:",err);
console.log("Saved:",country);
});
console.log("After save");
Country.findOne({}, function(err, country) {
if (err) console.log("Error:",err);
console.log("Load:",country);
});
console.log("After find");
app.get('*', function(req, res) {
// load the single view file (angular will handle the page changes on the front-end)
res.sendfile('./public/index.html');
});
// listen (start app with node server.js) ======================================
app.listen(8080);
console.log("App listening on port 8080");
When I launch it, I have the following log output:
C:\Mercurial\DV-DB-Catalog>npm start
> dv-db-catalog#1.0.0 start C:\Mercurial\DV-DB-Catalog
> node server.js
After save
After find
App listening on port 8080
connected to database dv_db_admin
As you can see, there is no log about saved or list executions. I've run mongo shell and executed show dbs but it didn't appear.
Anybody knows what's happening?
Thanks in advance!
P.S.: I am running on background mongo service. When I start express server, Mongo log shows the following:
2016-04-15T12:00:50.876+0200 I NETWORK [initandlisten] connection accepted from 127.0.0.1:50766 #71 (3 connections now open)
2016-04-15T12:00:50.877+0200 I NETWORK [initandlisten] connection accepted from 127.0.0.1:50767 #72 (4 connections now open)
2016-04-15T12:00:50.878+0200 I NETWORK [initandlisten] connection accepted from 127.0.0.1:50768 #73 (5 connections now open)
2016-04-15T12:00:50.881+0200 I NETWORK [initandlisten] connection accepted from 127.0.0.1:50769 #74 (6 connections now open)

Answer 1

Try moving all of your calls to MongoDB in the connection.once callback. It looks like you are trying to save/load data from MongoDB before you have connected:
connection.once('open', function () {
console.info('connected to database dv_db_admin')
// define model =================
var CountrySchema = new Schema({
name : String,
icaoCode : String,
documents : [String]
});
var Country = mongoose.model('Country', CountrySchema);
var country = new Country({
name : 'Afghanistan',
icaoCode : 'AFG',
documents : []
});
country.save(function(err, country) {
if (err) console.log("Error:",err);
console.log("Saved:",country);
});
console.log("After save");
Country.findOne({}, function(err, country) {
if (err) console.log("Error:",err);
console.log("Load:",country);
});
console.log("After find");
});