gistfile1.js

var Comment = Model("comment", 

  // Class methods
  {
    persistence: Model.RestPersistence("/posts/:post_id/comments"),
  
    findAllRemote: function(context, callback) {
      $.getJSON("/posts/" + context.post_id() + "/comments.json", function(json) {
        $.each(json, function(i, comment) {
          Comment.add(new Comment($.extend(comment, {post_id: context.post_id()})));          
        });
        callback.call(this);
      });
    },

    create: function(params, callback) {
      var comment = new Comment({ 
        post_id:  params['post_id'], 
        name:     params['comment']['name'], 
        email:    params['comment']['email'], 
        gravatar: params['comment']['gravatar'],
        body:     params['comment']['body']
      });
      comment.save(function(success) {
        if (success) Comment.add(comment);
        callback.call(this, success, comment);
      });
    },
    
    to_html: function() {
      var $html = "";
      Comment.each(function(i) {
        $html += this.to_html();
      });
      return $html;
    }
    
  },
   
  // Instance methods 
  {
    validate: function() {
      if (this.attr('body') == null || this.attr('body') == '') {
        this.errors.add("body", "cannot be empty");
      }
    },
    
    body: function() {
      return this.attr('body');
    },
    
    to_html: function() {
      return new EJS({url: "/javascripts/views/comments/_comment.ejs"}).render(this);
    },
    
    to_form: function() {
      return new EJS({url: "/javascripts/views/comments/_form.ejs"}).render(this);
    }
  }

);