added features

app.js

@@ -28,7 +28,22 @@ const Pokemon = require('./models/Pokemon')
 app.get('/', (req, res) =>{
  const promise = Pokemon.find({})
  promise.then(data => res.json(data)).catch(err => res.json(err))
-
+ // The same works with a callback function:
+ /*Pokemon.find({}, function(data, err){
+ if(data)
+ res.json(data)
+ else
+ res.json(err)
+ })*/
+})
+
+app.get('/:id', (req, res, next) => {
+ const promise = Pokemon.find({national_id:req.params.id})
+ promise.then((pokemon) => {
+ if(!pokemon)
+ next({message: "The pokemon doesn't exist"})
+ res.json(pokemon)
+ }).catch(err => res.json(err))
 })
 
 app.listen(process.env.PORT || 3000, () => {