// possible baselayers
App.BaseLayer = Ember.Model.extend({
  // has various props
});

//config
App.Config = Ember.Model.extend({
  appName: attr(),
  appId: attr(),
  login: attr(),
  baseLayers: Ember.hasMany('App.BaseLayer', {key: 'baseLayerItems', embedded: true}),
  //...and so on
});

//create config instance
App.initializer({
  name: 'preload',

  initialize: function(container) {
    // defer and advance readiness used to allow app
    // to grab config before loading rest of app
    App.deferReadiness();

    App.ConfigStore.getConfigJSON().then(
      function(json) {

        var config = App.Config.create({container: container});
        container.register('app:config', config, {instantiate: false});
        config.load(1, json);
        // we actually inject this config in various spots, but that's not relevant here...
        App.appConfig = config;

      },
      function(status, request, error) {
        window.location.replace("initialize_error.html");
      }
    );
  }
});

App.BaseLayer.forEachCachedRecord(
  function(r) {console.log(r.get('id'));
});