Calling a $resource action from inside a user defined $scope function - ruby-on-rails-3

Question

The frontend: AngularJS 1.1.5, which has ngResource returning a promise's $then function
The backend: Rails 3.2
The problem: Whenever I call the Card.update action from inside a function in an AngJS controller, I get no response from attempting to log both the success and error responses. The Card $resource behaves as expected works when calling the Card.update action from outside the function.
Rails Associations
Deck has_and_belongs_to_many :cards
Card has_and_belongs_to_many :decks
Rails routes
resources :cards do
get '/decks' => 'cards#decks', on: :member
end
Rails Card Controller 'update' action
def update
#card = Card.where( id: params[:id] ).first
unless params[:deck_id].nil?
#deck = Deck.where( id: params[:deck_id] ).first
#deck.cards << #card
end
render json: Card.update( params[:id], params[:card] )
end
Cards Resource Factory
app.factory "Card", ($resource) ->
$resource "/cards/:id",
id: "#id"
,
index:
method: "GET"
isArray: true
show:
method: "GET"
isArray: false
create:
method: "POST"
update:
method: "PUT"
destroy:
method: "DELETE"
decks:
method: "GET"
isArray: true
url: 'cards/:id/decks'
Cards update function (inside AngJS Controller): (Success/error messages aren't logged to the console).
$scope.updateCard = ( card_id, old_deck, new_deck ) ->
console.log 'CardCtrl updateCard function'
card_id = parseInt(card_id)
old_deck = parseInt(old_deck)
new_deck = parseInt(new_deck)
Card.update( id: card_id, deck_id: new_deck ).$then (success, error) ->
console.log 'Success'
console.log success
console.log 'Error'
console.log error

Answer 1

Introduction
I solved my own problem. I used this Github comment from Misko Hevery as reference.
Why my PUT request wasn't executing:
Apparently, in Angular 1.1.x, if you ever leave the angular execution context, you'll be outside of Angular's $scope.$apply function. In my case, I was working with JQuery UI's sortable function - whenever a Card was placed in a new Deck, I wanted to update the Deck's cards to reflect that update.
To the best of my understanding, because of this, I was outside the angular execution context. ngResource wouldn't execute the PUT statement and the $then function of the Angular's promise object will never be called.
The solution:
Simply wrapping the $scope.$apply function around the Card.updateaction allowed the action to execute, which subsequently allowed the $then function to execute. See the code example below for further clarification:
$scope.$apply ->
Card.update(
id: 1
deck_id: 2
front: "HELLO WORLD!"
).$then ((success) ->
console.log "Success"
console.log success
), (error) ->
console.log "Error"
console.log error