Create nodejs express 4 route on runtime - node.js

Question

I am trying to create a route on runtime. I am trying to create a flat url structure so if we add an article it will create a slug for it and will create a new route.
I use express 4 new router function
app.js
var express = require('express');
var routes = require('./routes.js');
app.use('/', routes);
var server = http.createServer(app).listen(app.get('port'));
routes.js
var express = require('express');
var router = express.Router();
router.get('/new' ,site.new);
module.exports = router;
I tried creating a function in the router and calling it from the app.js also creating a function in the router while sharing the app instance accross the files
module.exports = app;
and calling it
var app = require("./app.js");
It doesnt seem to work any other idea ?
update:
I have a file called helpers.js and i added the following function
module.exports={
addRoute:function(){
var express = require('express');
var router = express.Router();
var app = require('../app.js');
var routes = require('../routes.js');
router.get('/book', function (req, res) {
res.send('Hello World!');
});
app.use('/book', router);
},
I end up doing that
addRoute:function(){
var express = require('express');
var router = express.Router();
var routes = require('../routes.js');
var app = require('../start-freedom1.js');
router.get('/book' ,function (req, res, next) {
res.send({"data":"kaki","values":"","errors":""});
});
for(var layer in app._router.stack){
if(app._router.stack[layer].name=="router"){
app._router.stack[layer].handle.stack.splice(0, 0, router.stack[0]);
console.log(app._router.stack[layer].handle.stack)
break;
}
}
// / app.use('/', routes);
},
the problem that i had router.get("*"..... at the end of the rout file so i always saw 404

Answer 1

I think that what you are looking for is passing parameters in the URL which you can extract and then use to do some processing. You can do something like below:
app.get('/article/:article_id', function(req, res){
art_id = req.params.article_id;
//query database using art_id
}
If you want to use query parameters instead (with "...../article?id=234") then you would have to use req.query. Have a look at the following page http://expressjs.com/en/api.html#req.params.
Request parameters are considered best practice as they are more readable and are also SEO friendly. You can edit your model to store the article slug as a field but should be unique, that way they can be used to query your DB.