javascript - Backbone get() returns undefined -

problem lies in postrouter var in app.js file. logging this.posts.tojson() returns data in db calling passing id returns undefined. routing works id passed in url , logged in function. using mongo store data , monk query db.

my server file

//configure app.configure(function(){     app.use(express.json()); //parses json requests being sent server     app.use(express.static( path.join(__dirname, 'public') )); //serve files path given });  app.get("/posts", function(req, res){     var db = req.db;      db.get("postscollection").find({}, function (err, results) {         res.json(results);     }); });  //create route using express rest api app.get('/*', function(req, res){     var db = req.db;      db.get("postscollection").find({}, function (err, results) {         res.render("index.ejs", { posts: json.stringify(results) }); //pass object of values use in template     }); });  app.listen(3000); 

my app file

//post var post = backbone.model.extend({});  //posts var posts = backbone.collection.extend({         model: post,         url: "/posts"     });  //postlistview var postlistview = backbone.view.extend({     tagname: 'li',      template: _.template("<a href='/posts/{{_id}}'>{{title}}</a>"),      render: function () {         this.el.innerhtml = this.template(this.model.tojson()); //this.model view instance         return this;     },      events: {         'click a': 'handleclick'     },      handleclick: function (e) {         e.preventdefault();         postrouter.navigate($(e.currenttarget).attr("href"), { trigger: true }); //navigate specified route , trigger routing     } });  //postslistview var postslistview = backbone.view.extend({     template: _.template("<h1>my blog</h1><ul></ul>"),      render: function () {         this.el.innerhtml = this.template();          var ul = this.$el.find("ul"); //this.$el == $(el)          this.collection.foreach(function (post) {             ul.append(new postlistview({ model: post }).render().el);         });          return this;     } });  //postview var postview = backbone.view.extend({             events: {         'click a': 'handleclick'     },      initialize: function(){         _.bindall(this, "render");         this.template = _.template($("#postview").html()); //to prevent template loading before scripts     },      render: function () {         var model = this.model.tojson();          this.el.innerhtml = this.template(model);          return this;     },      handleclick: function (e) {         e.preventdefault();         postrouter.navigate($(e.currenttarget).attr("href"), {trigger: true});     } });  //postrouter var postrouter = backbone.router.extend({     initialize: function (options) {         this.posts = options.posts; //the posts collection         this.main  = options.main; //the main id div in view     },      routes: {         ''         : 'index',         'posts/:id': 'singlepost'     },      index: function () {         var pv = new postslistview({ collection: this.posts });         this.main.html(pv.render().el);     },      singlepost: function (id) {             console.log("view post " + id); //logs id passed         console.log(this.posts.tojson()); //logs data in db          var post = this.posts.get(id); //returns undefined         var pv = new postview({ model: post });          this.main.html(pv.render().el);     } }); 

the index works fine , display data trying view individual posts breaks application.