biggie-orm.js

var orm = require('biggie-orm');

orm.connect();

var Deck = orm.model('Deck', {
  name: {type: 'string'},

  has_many: ['slides'],
  indexes: ['name']
});

var Slide = orm.model('Slide', {
  position: {type: 'number'},

  belongs_to: ['deck'],
  indexes:    ['position']
});

var my_deck = new Deck({
  name: 'My Deck'
});

var some_slides = new orm.Collection([
  new Slide({ position: 1 }),
  new Slide({ position: 2 }),
  new Slide({ position: 3 }),
  new Slide({ position: 4 })
]);

my_deck.addSlides(some_slides);

my_deck.save(function (error) {
  // Deck + associated slides saved!
  // Lets insert a new one at position 3!
  my_deck.findSlides({ position: { gt: 2 } }).all(function (error, coll) {
    var slide;

    for (var i = 0, il = coll.length; i < il; i++) {
      slide = coll[i];
      slide.position += 1;
    }

    coll.save(function (err) {
      var new_slide = new Slide({ position: 3 });

      my_deck.addSlide(new_slide);
      my_deck.save(callback);
    });
  });
});