Distinguish Between Request Parameters in the same position? - node.js

Question

Is there a way to distinguish between request parameters in the same position in expressjs?
E.g., is there a way to have:
router.get('/pages/:id', function(req,res){
var id=req.params.id;
api.getPagebyID(id, function(err,pageData){
if (err) console.log(err);
console.log(pageData);
});
});
And to have:
router.get('/pages/:name', function(req,res){
var name=req.params.name;
api.getPagebyName(name, function(err,pageData){
if (err) console.log(err);
console.log(pageData);
});
});

Answer 1

You can certainly set multiple middlewares for a particular pattern, but it's up to you to decide when to skip a middleware (with next). After a response is sent, no further middlewares are executed.
router.get('/pages/:id', function(req, res, next){
var id=req.params.id;
api.getPagebyID(id, function(err,pageData){
console.log(pageData);
if (err){
console.log(err);
if(err.error === 'not_found'){
// No id. Try name:
next();
} else {
// Actual error:
res.status(500).send();
}
}
});
});
router.get('/pages/:name', function(req,res){
var name=req.params.name;
api.getPagebyName(name, function(err,pageData){
if (err) console.log(err);
console.log(pageData);
});
});

Answer 2

If ID is a number, you can use regex to only match numbers:
router.get('/user/:id([0-9]+)', function(req, res){
res.send('user ' + req.params.id);
});
router.get('/range/:range(\\w+\.\.\\w+)', function(req, res){
var range = req.params.range.split('..');
res.send('from ' + range[0] + ' to ' + range[1]);
});
Check out the docs here: http://expressjs.com/4x/api.html#router.param