Mongoose Js bootstrapping

config.js

var dbConfig = {

    db   : null,
    host : '127.0.0.1',
    port : '27017',
    name : 'test',

    getConString : function(){
        return 'mongodb://' + this.host +
            ':' + this.port + '/' + this.dbName;
    }
}

dbConfig.setup = function(){

    this.mongoose = require('mongoose');
    this.mongoose.connect(this.getConString());

    this.db = this.mongoose.connection;
    this.db.on('error', console.error.bind(console, 'connection error:'));
    this.db.once('open', function(){ console.log('mongoDb connected');});
}

dbConfig.setup();

module.exports = {
    db : dbConfig.db,
    mongoose : dbConfig.mongoose
};