example.js

app.factory('AlbumFactory', function(DS){
  var AlbumFactory = DS.defineResource({
    basePath: 'api',
    name: 'albums',  
    idAttribute: '_id',  
    methods: {
      raw: function(){
        return 'api/albums/'+ this._id + '.image'
      }
    }
  })
  return AlbumFactory; 
})
.controller('AlbumController', function(AlbumFactory){
  // GET to 'api/albums'
  AlbumFactory.findAll()
  .then(function(albums){
    var firstAlbum = albums[0]
  })
})