Video Course on Building Web Applications with Node.js

Use Mongoose to save and retreive blog articles

Start up mongodb locally:NodeJS mongoose module to interact with the DB:

  // Post.js

// Require mongoose
var mongoose = require('mongoose');

// Configure conenction URL (only needs to happen once per app)
mongoose.connect('mongodb://localhost/test');

// Create a database schema for our Post object, which will describe both it's
// data and it's behavior.
var postSchema = mongoose.Schema({
    title:String,
    content:String
});

// Create a model object constructor that will have ODM functionality like .save()...
var Post = mongoose.model('Post', postSchema);

// Expose out model as the module interface
module.exports = Post;

Use this module in app.js:list all items with find:

  // Render our home page with all blog posts
app.get('/', function(request, response) {
    Post.find(function(err, posts) {
        if (err) {
            response.send(500, 'There was an error - tough luck.');
        }
        else {
            response.render('index', {
                posts:posts
            });
        }
    });
});

Create a post route, create a new item and save it. Get the post data from the ​request.body​ object:

  // create a new blog post object
app.post('/create', function(request, response) {
    //Create and save a Post model
    var post = new Post({
        title: request.body.title,
        content: request.body.content
    });

    //Save the model
    post.save(function(err, model) {
        if (err) {
            response.send(500, 'There was an error - tough luck.');
        }
        else {
            response.redirect('/');
        }
    });
});

the HTML for the form to POST:

  <form action="/create" method="POST">
    <label>Post Title</label>
    <input type="text" name="title" placeholder="Type a title..."/>

    <label>Post Content</label>
    <textarea name="content" rows="5"></textarea>
    <p>
        <button type="submit" class="btn">Submit</button>
    </p>
    
</form>

explains package.json file, most notable the ​dependencies​ section 

Use authentication

  var auth = express.basicAuth(function(username, password){
    return username === "foo" && password === "bar";
})

Then just add the ​auth​ middleware we created to our routes:

Create an API for listing blog posts as JSON

  app.get('/posts.json', function(request, response) {
    Post.find(function(err, posts) {
        if (err) {
            response.send(500, {
                success: false
            });
        }
        else {
            response.send({
                success: true,
                posts: posts
            });
        }
    });
});