Simple blog with node.js, express and mongodb

app.js

var express = require('express'),
    app = express.createServer(),
    Post = require('./models/post');

app.configure(function () {
    app.use(express.methodOverride());
    app.use(express.bodyDecoder());
    app.use(express.staticProvider(__dirname + '/public'));
    app.use(express.compiler({src: __dirname + '/public', enable: ['sass']}));
    app.use(express.logger());

    app.set('view engine', 'haml');
    app.register('.haml', require('hamljs'));
});

app.get('/', function (req, res) {
    Post.find().all(function (docs) {
       res.render('index', {
           locals: {title: 'Blog', articles: docs}
       });
    });
});

app.get('/blog/new', function(req, res) {
    res.render('new', {locals: {title: 'New Post'}});
});

app.post('/blog/new', function(req, res) {
    var p = new Post();
    p.title = req.body.title;
    p.body = req.body.body;

    p.save(function () {
        res.redirect('/');
    });
});

app.post('/blog/addComment', function(req, res) {
    Post.findById(req.body._id, function(article) {
        var comment = {person: req.body.person, comment: req.body.comment, created_at: new Date()};
        article.comments.unshift(comment);
        article.save(function() {
            res.redirect('/blog/' + req.body._id);
        });
    });
});

app.get('/blog/:id', function(req, res) {
    Post.findById(req.params.id, function(data) {
        res.render('view', {locals: {title: data.title, article: data}});
    });
});

app.listen();

index.haml

%h1= title
#articles
  - each article in articles
    %div.article
      %div.created_at= article.created_at
      %div.title
        %a{href: "/blog/" + article._id.toHexString()}= article.title
      %div.body= article.body

layout.haml

!!! 5
%html
  %head
    %title= title
    %link{rel: 'stylesheet', href: '/css/style.css', type: 'text/css'}
  %body
    #wrapper
      != body

new.haml

%h1= title
%form{method: 'post', action: '/blog/new'}
  %div
    %div
      %span Title :
      %input{type: 'text', name: 'title', id: 'editArticleTitle'}
    %div
      %span Body :
        %textarea{name: 'body', rows: 20, id: 'editArticleBody'}
    %div#editArticleSubmit
      %input{type: 'submit', value: 'Send'}

post.js

var mongoose = require('mongoose').Mongoose,
    db = mongoose.connect('mongodb://localhost/blog');

mongoose.model('Post', {
    properties: [
        'title', 'body',
        {comments: [['person', 'comment', 'created_at']]},
        'created_at'
    ],

    methods: {
        save: function (fn) {
            this.created_at = new Date();
            this.__super__(fn);
        }
    }
});

module.exports = db.model('Post');

style.sass

body
  :font-family "Helvetica Neue", "Lucida Grande", "Arial"
  :font-size 13px
  :text-align center
  =text-stroke 1px rgba(255, 255, 255, 0.1)
  :color #555
h1, h2
  :margin 0
  :font-size 22px
  :color #343434
h1
  :text-shadow 1px 2px 2px #DDD
  :font-size 60px
#articles
  :text-align left
  :margin-left auto
  :margin-right auto
  :width 320px
  .article
    :margin 20px
    .created_at
      :display none
    .title
      :font-weight bold
      :text-decoration underline
      :background-color #EEE
    .body
      :background-color #FFA
#article
  .created_at
    :display none
  input[type=text]
    :width 490px
    :margin-left 16px
  input[type=button]
    :text-align left
    :margin-left 440px
  textarea
    :width 490px
    :height 90px

view.haml

%h1= title
%div#article
  %div.created_at= article.created_at
  %div.title= article.title
  %div.body= article.body
  - each comment in article.comments
    %div.comment
      %div.person= comment.person
      %div.comment= comment.comment
  %div
    %form{method: 'post', action: "/blog/addComment"}
      %input{type: 'hidden', name: '_id', value: article._id.toHexString()}
      %div
        %span Author :
        %input{type: 'text', name: 'person', id: 'addCommentPerson'}
      %div
        %span Comment :
        %textarea{name: 'comment', row: 5, id: 'addCommentComment'}
      %div#editArticleSubmit
        %input{type: 'submit', value: 'Send'}