Simple Mongoose example

created and updated field.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/myapp');

var schema = new mongoose.Schema({
  name: String,
  created: {
    type: Date,
    'default': Date.now
  },
  updated: Date
}).pre('save', function(next) {
  this.updated = new Date();
  next();
});

var model = mongoose.model('MyModel', schema);

new model({
  name: 'Taro'
}).save(function(err, saved) {
  if (err) throw err;

  setTimeout(function() {
    console.log('generated ID : ', saved._id);

    model.findById(saved._id, function(err, data) {
      if (err) throw err;

      data.name = 'Jiro';
      data.save(function(err, updated) {
        if (err) throw err;

        console.log('updated', updated);
      });
    });
  }, 1000);
});

Simple Mongoose example.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/myapp');

var schema = new mongoose.Schema({
  name: String
});

var model = mongoose.model('MyModel', schema);

new model({
  name: 'Taro'
}).save(function(err) {
  console.log(err);
});