index.js

const mongoose = require('mongoose')
  , util = require('util')
  , config = require('config/env')
  , app = require('config/express');

const debug = require('debug')('express-mongoose-plain-es6-rest-api:index');

// plugin native ES6 promise in mongoose
mongoose.Promise = global.Promise;

// connect to mongo db
mongoose.connect(config.db, { server: { socketOptions: { keepAlive: 1 } } });
mongoose.connection.on('error', () => {
  throw new Error(`unable to connect to database: ${config.db}`);
});

// print mongoose logs in dev env
if (config.MONGOOSE_DEBUG) {
  mongoose.set('debug', (collectionName, method, query, doc) => {
    debug(`${collectionName}.${method}`, util.inspect(query, false, 20), doc);
  });
}

// module.parent check is required to support mocha watch
// src: https://github.com/mochajs/mocha/issues/1912
if (!module.parent) {
  // listen on port config.port
  app.listen(config.port, () => {
    debug(`server started on port ${config.port} (${config.env})`);
  });
}

module.exports = app;