my take on MVC on the client

controller.coffee

class ArticleViewController extends ViewController
  initialize: (@params) ->
    @event.on('button.new-comment', 'click', @new_comment)  
    @event.on('button.like', 'click', @like)
    
  new_comment: (event) ->
    comment_body = $('input.new-comment').val()
    comment = new Comment({body: comment_body})
    if comment.save()
      flash_notice("Comment posted!")
    else
      flash_alert("There was an error posting your comment")
      
  like: (event) ->
    $like_container = $(".article-likes").
    old_likes = parseInt($like_container.html())
    article = Article.find(@params.id)
    article.like()
    
    likes = ++old_likes
    $like_container.html(likes)

model.coffee

class Article extends Model
  url: articles_path()
  
  like: () ->
    endpoint.vote({type: 'up'})
    
class Comment extends Model
  url: article_comments_path(window.active_controller.id)

routes.coffee

Router.draw ->
  route articles_path(':id'), ArticleViewContoller