use mapReduce

app.js

@@ -37,10 +37,16 @@ var postSchema = new mongoose.Schema({
     content: String
 });
 
+var mapAgeSchema = new mongoose.Schema({
+    value: { type: Number, default: 0}
+});
+
 app.db = {
 	model: {
 		User: mongoose.model('user', vcardSchema),
-		Post: mongoose.model('post', postSchema)
+		Post: mongoose.model('post', postSchema),
+    /* MapReduce */
+    MapAge: mongoose.model('map_age', mapAgeSchema)
 	}
 };
 
@@ -63,6 +69,7 @@ if ('development' == app.get('env')) {
 }
 
 app.get('/', require('./routes/index').index);
+app.get('/post', require('./routes/index').post);
 
 // REST API
 app.post('/1/user', api.create);
@@ -73,10 +80,13 @@ app.delete('/1/user/:nickname', api.delete);
 app.get('/1/user/age/:age', api.readByAge);
 app.get('/1/user/age/:from/:to', api.readByAgeRange);
 
+app.get('/1/user/map/age', api.mapByAge);
+
 // Profile
 app.post('/1/user/:nickname/:type', api.upload);
 
 app.post('/1/post', api.createPost);
+app.get('/1/post', api.readPost);
 
 http.createServer(app).listen(app.get('port'), function(){
   console.log('Express server listening on port ' + app.get('port'));

public/post.js

@@ -0,0 +1,44 @@
+/**
+* SETUP
+**/
+var app = app || {};
+
+/**
+* MODELS
+**/
+app.Posts = Backbone.Model.extend({
+  url: function() {
+    return '/1/post';
+  },
+  defaults: {
+    errors: [],
+    errfor: {},
+    posts: []
+  }
+});
+
+/**
+* VIEWS
+**/
+app.ListView = Backbone.View.extend({
+	el: '#postList',
+  template: _.template( $('#tmpl-post-list').html() ),
+  events: {
+  },
+  initialize: function() {
+    this.model = new app.Posts();
+    this.listenTo(this.model, 'sync', this.render);
+    this.listenTo(this.model, 'change', this.render);
+    this.model.fetch();
+  },
+  render: function() {
+    this.$el.html(this.template( this.model.attributes ));
+  }
+});
+
+/**
+* BOOTUP
+**/
+$(document).ready(function() {
+  app.listView = new app.ListView();
+});

routes/api.js

@@ -102,6 +102,36 @@ exports.createPost = function(req, res){
   res.send({status: 'OK'});
 };
 
+exports.readPost = function(req, res){
+  var model = req.app.db.model.Post;
+
+  model
+  	.find({})
+  	.populate('uid')
+  	.exec(function(err, posts) {
+	  	res.send({
+	  		posts: posts
+	  	});
+	  	res.end();
+  	});
+};
+
+exports.mapByAge = function(req, res) {
+  var model = req.app.db.model.User;
+
+  model
+	.mapReduce(
+		function() { emit( this.Age, this.Name); },
+		function(key, values) { 
+			return values.toString();
+		},
+		{
+			query: { Age: { $gt: 30 } },
+			out: 'map_ages'
+		}
+    );
+};
+
 exports.upload = function(req, res) {
 
     var type = req.params.type;   // 'photo' or 'voice'

routes/index.js

@@ -5,4 +5,8 @@
 
 exports.index = function(req, res){
   res.render('index', { title: 'Express' });
+};
+
+exports.post = function(req, res){
+  res.render('post', { title: 'Express' });
 };

views/post.jade

@@ -0,0 +1,17 @@
+extends layout
+
+block content
+  h1= title
+  div#postList
+
+  script(type='text/template', id='tmpl-post-list')
+    h3 Post List
+    ul
+      <% _.each(posts, function(post) { %>
+      li <%= post.title %>, <%= post.uid.Name %>: <%= post.content %>
+      <% }); %>
+
+  script(src='jquery/dist/jquery.min.js', type='text/javascript')
+  script(src='underscore/underscore-min.js', type='text/javascript')
+  script(src='backbone/backbone.js', type='text/javascript')
+  script(src='post.js', type='text/javascript')