Model event

http://stackoverflow.com/questions/12051775/backbonejs-object-object-has-no-method-apply-when-setting-model-attribute#comment16092817_12051775

by fguillen

HTML

<script src="http://documentcloud.github.com/underscore/underscore.js"></script>
<script src="http://documentcloud.github.com/backbone/backbone.js"></script>

JavaScript

var Box = Backbone.Model.extend({
  initialize: function() {
    this.on( "change:status", this.hasChanged, this);
  },

  hasChanged: function() {
    console.log( "I changed", this.get( "name" ), this.get( "status" ) );
  }
});

var BoxList = Backbone.Collection.extend({
  model: Box,

  boxStatusChanged: function() {
    boxes.each( function( model ) {
      model.set({status: "changed"});
    });
  },

});

var boxes = new BoxList();

var box1 = new Box({ name: "box 1", status: "init" });
boxes.add( box1 );

var box2 = new Box({ name: "box 2", status: "init" });
boxes.add( box2 );

boxes.boxStatusChanged();