javascript - Cannot display data in a view in a express nodejs app -

i'm brand new express , node , i'm creating simple express app gets data stored in json file,on post/details view data stored not rendering.i believe way pull data json file can't see error??

here code:

posts.json

[     {         "name": "first name",         "description": "test first description",         "slug": "first-name",         "id": "2f065d59"     },    {         "name": "second name",         "description": "test second description",         "slug": "second-name",         "id": "0071b034"     } ] 

postslist.js

var express = require('express'); var creatordb = require('./database/posts.json'); var fs = require('fs'); var uuid = require('node-uuid');  var list = function () { return creatordb; };  var getbyid = function (id) {      for(var i=0;i<creatordb.length;i++) {          var id = creatordb[i].id;    } return id; };  exports.list = list; exports.getbyid = getbyid; 

post.js

var express = require('express'); var router = express.router(); var db = require('./postslist'); var fs = require('fs');  exports.index = router.get('/',function (req, res) {     res.render('post/index', { posts: db.list()}); });  exports.form = router.get('/create',function (req, res) {     res.render('post/form'); });  exports.details = router.get('/details/:id',function (req, res, next) {     console.log(req.body.name);     console.log(req.body.description);     console.log(req.body.id);     //console log gives me this:     undefined     undefined     undefined      var post = db.getbyid(req.params.id);     res.render('post/details', {post:post});     });  module.exports = router; 

app.js

var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieparser = require('cookie-parser'); var bodyparser = require('body-parser'); var uuid = require('node-uuid'); var routes = require('./routes/index'); var post = require('./routes/post');  var app = express();  // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'ejs');  // uncomment after placing favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyparser.json()); app.use(bodyparser.urlencoded({ extended: false })); app.use(cookieparser());  app.use('/', routes); app.use('/post', post);  module.exports = app; 

i can acess post/details/:id route fine name description , other params don't display. can explain me i'm missing here? - thanks.

correct getbyid function

    var getbyid = function (id) {       for(var i=0;i<creatordb.length;i++) {         if(creatordb[i].id == id){           return creatordb[i];         }       }     };