Converting retrieved Ember Data records into plain javascript objects

I have a model, in the route I would like to query the store, convert the results to pure javascript json objects. How can I achieve this? Bellow the route:

myApp.EunitsRoute = Ember.Route.extend({
  model: function() {
        return this.store.find('unit');
        // return this results as pure javascript objects
  },
    setupController: function(controller, model) {
        this._super(controller, model);
        controller.set('units', model);
    },