yayson

YAYSON

A library for serializing and reading JSON API data in JavaScript. As of 2.0.0 YAYSON aims to support JSON API version 1.

Installing

Install yayson by running:

$ npm install yayson --save

Presenting data

A basic Presenter can look like this in Coffeescript:

  {Presenter} = require('yayson')(adapter: 'default')

  class ItemsPresenter extends Presenter
    type: 'items'

  item =
    id: 5
    name: 'First'

  ItemsPresenter.render(item)

Or in plain JavaScript:

  const Presenter = require('yayson')({
    adapter: 'default'
  }).Presenter;

  class ItemsPresenter extends Presenter {};
  ItemsPresenter.prototype.type = 'items';

  var item = {
    id: 5,
    name: 'First'
  };

  ItemsPresenter.render(item);

This would produce:

{
  data: {
    id: 5,
    type: 'items',
    attributes: {
      id: 5,
      name: 'First'
    }
  }
}

It also works with arrays, so if you send an array to render, "data" will be an array.

A bit more advanced example:

  {Presenter} = require('yayson')(adapter: 'default')

  class ItemsPresenter extends Presenter
    type: 'items'

    attributes: ->
      attrs = super
      attrs.start = moment.utc(attrs.start).toDate()
      attrs

    relationships: ->
      event: EventsPresenter

  ItemsPresenter.render(item)

In JavaScript this would be done as:

var Presenter = require('yayson')().Presenter;

class ItemsPresenter extends Presenter {};
ItemsPresenter.prototype.type = 'items'

ItemsPresenter.prototype.attributes = function() {
  var attrs = Presenter.prototype.attributes.apply(this, arguments);

  attrs.start = moment.utc(attrs.start).toDate();
  return attrs;
}

ItemsPresenter.prototype.relationships = function() {
  return {
    event: EventsPresenter
  }
}

ItemsPresenter.render(item)

Sequelize support

By default it is set up to handle standard JS objects. You can also make it handle Sequelize.js models like this:

{Presenter} = require('yayson')({adapter: 'sequelize'})

You can also define your own adapter globally:

{Presenter} = require('yayson')(adapter: {
  id: function(model){ return 'omg' + model.id},
  get: function(model, key){ return model[key] }
})

Or at Presenter level:

ItemPresenter.adapter = {
  id: function(model){ return 'omg' + model.id},
  get: function(model, key){ return model[key] }
}

Take a look at the SequelizeAdapter if you want to extend YAYSON to your ORM. Pull requests are welcome. :)

Metadata

You can add metadata to the top level object.

  ItemsPresenter.render(items, meta: count: 10)

This would produce:

{
  meta: {
    count: 10
  }
  data: {
    id: 5,
    type: 'items',
    attributes: {
      id: 5,
      name: 'First'
    }
  }
}

Parsing data

You can use a Store can like this:

    {Store} = require('yayson')()
    store = new Store()

    adapter.get(path: '/events/' + id).then (data) ->
      event = store.sync(data)

This will give you the parsed event with all its relationships.

Use in the browser

Recommended way is to use it via webpack or similar build system wich lets you just require the package as usual.

If you just want to try it out, copy the file dist/yayson.js to your project. Then simply include it:

    <script src="./lib/yayson.js"></script>

Then you can var yayson = window.yayson() use the yayson.Presenter and yayson.Store as usual.

Browser support

Tested

• Chrome
• Firefox
• Safari
• Safari iOS

Untested, but should work

• IE 9+
• Android