digitalAssetsCollection.js

var DigitalAssetsCollection = Backbone.Collection.extend({
  model: Backbone.Model,
  initialize: function(undefined, options) {
    Backbone.Collection.prototype.initialize.apply(this, arguments);
    this.parent = options && options.parent;
    if ( !this.parent ) {
      throw "a parent product must be provided at initialization";
    }
  },
 
  // Uses the path of the parent to generate the url for this digital
  // assets collection
  url: function() {
    return _.result(this.parent, "url") + "/digital_assets";
  }
});