app.js

  .state('app.favorites', {
    url: "/favorites",
    views: {
      'menuContent': {
        templateUrl: "templates/favorites.html",
        controller: 'FavoritesCtrl'
      }
    },
    resolve: {
      favorites: function(FavsService){
        return FavsService.getFavs()
      }
    }
  })

  .state('app.favorite', {
    url: "/favorites/:favoriteId",
    views: {
      'menuContent': {
        templateUrl: "templates/favorite.html",
        controller: 'FavoriteCtrl'
      }
    },
    resolve: {
      art: function($stateParams, FavsService){
        return FavsService.getFav($stateParams.favoriteId)
      }
    }