SpineJS User's Name helper + showing off getters/setters in Spine

_schema.rb

ActiveRecord::Schema.define(:version => 00000000000000) do

  create_table "users", :force => true do |t|
    t.string   "username",               :default => "", :null => false
    t.string   "email",                  :default => "", :null => false
    t.string   "encrypted_password",     :default => "", :null => false
    
    # Devise fluff here...
    
    t.string   "first_name",             :default => "", :null => false
    t.string   "last_name",              :default => "", :null => false
  end

end

name.js.coffee

window.Name = class Name
  constructor: (user, name_parts) ->
    @user = user
    _full = name_parts.map (w) -> w.capitalize()
    _first = _full[0]
    _last = _full[_full.length-1]
    
    Object.defineProperty @, "first",
        get: -> _first
        set: (val) ->
          _first = val.trim().capitalize()
          user.first_name = _first
    
    Object.defineProperty @, "last",
        get: -> _last
        set: (val) ->
          _last = val.trim().capitalize()
          user.last_name = _last
    
    Object.defineProperty @, "full",
        get: -> [_first, _last].join(" ")
        set: (val) ->
          _full = val.underscore().split("_").map (w) -> w.trim().capitalize()
          @first = _full[0]
          @last = _full[_full.length-1]

user.js.coffee

class User extends Spine.Model
  @configure 'User', 'email', 'username', 'first_name', 'last_name'
  @extend Spine.Model.Ajax
  
  constructor: (attributes) ->
    super attributes
    
    @name = new Name(@, [@first_name, @last_name])

z - Chrome Console Output.txt

> user = new User({first_name: "Ryan", last_name: "Lewis"});
< User

> user.first_name;
< "Ryan"

> user.last_name;
< "Lewis"

> user.name.first;
< "Ryan"

> user.name.first = "Randy"
< "Randy"

> user.name.first;
< "Randy"

> user.name.full;
< "Randy Lewis"

> user.name.full = "Janis Joplin";
< "Janis Joplin"

> user.name.first;
< "Janis"

> user.name.last;
< "Joplin"

> user.name.full;
< "Janis Joplin"

> user.first_name;
< "Janis"

> user.last_name;
< "Joplin"

> console.log("Cool, it just works!);