gistfile1.txt

In body.html:

<%= select_field_view :store, 
                      :name_key => 'name',
                      :value_key => 'guid',
                       :sort_key => 'name',
                      :empty => 'Select a store',
                      :bind => { 
                        :value => 'TestHarness.storesController.selection',
                        :objects => 'TestHarness.storesController.arrangedObjects'
                      } %>

In TestHarness.storesController:

TestHarness.storesController = SC.CollectionController.create(
/** @scope TestHarness.storesController */ {
  //content: [],

  allowsEmptySelection: false,
  allowsMultipleSelection: true,

  filterAreas: function() {
	alert('observed!');
	TestHarness.areasController.set('content', this.get('selection').get('areas'));	
  }.observes('selection')

}) ;

In TestHarness.Store (model):

TestHarness.Store = SC.Record.extend(
/** @scope TestHarness.Stores.prototype */ {
  
  dataSource: TestHarness.server,

  resourceURL: 'rest/rest/stores',

  //properties: ['active', 'class', 'corporateOwner', 'name', 'notes', 'storeId', 'updatedBy', 'updatedTimestamp', 'version'], 

  properties: ['name'],

  areas: SC.Record.hasMany('TestHarness.Area', 'store')

}) ;

TestHarness.Store.all = SC.Collection.create({recordType: TestHarness.Store });

in TestHarness.Area (model):

TestHarness.Area = SC.Record.extend(
/** @scope TestHarness.Area.prototype */ {

  storeType: 'TestHarness.Store'

}) ;