Insert to database with javascript on click with node.js

Question

I am trying to insert data in my database when I click an element, on the element I got a function which gets some data from it. Then I want to insert that data + some more to my database, like this:

 function insertItem(x)
  {     
    var Aktiv = "Bokad";      
    var tid = x.dataset.tid;
    var dag = x.dataset.dag;
    var namn = "Filip";
    var url = '/insert/' + Aktiv + '/' + tid + '/' + dag + '/' + namn;
    $.ajax({
      url: url,
      type: 'POST',
      success: function(result){
    console.log(result);
      },
      error: function(err){
        console.log(err);
      }
    });    
  }

Then in my node file I think I should retrive it like this:

app.post('/insert/:Aktiv/:dag/:namn/:tid', function(req, res){
pool.connect(function(err, bokad, done){

 if(err){
     return console.error('error fetching bokad inserted', err);
 }
 bokad.query("INSERT INTO bokad(aktiv, dag, namn, tid) VALUES($1, $2, $3, $4)",
 [req.body.Aktiv, req.body.dag, req.body.namn, req.body.tid]);
 console.log(req.body.Aktiv);

done();
res.redirect('/');
});
});

Element I click contains this

<td onclick = "insertItem(this)" data-dag = "<%= bord.rows[19].dag %>" data-tid = "<%= bord.rows[19].tid %>" class = "<%= bord.rows[19].Aktiv %>"></td>

Answer 1

In your post route you can see that you declared parameter variables: :Aktiv. You would also have to do this with dag, namn, tid. with a : before it.

There are multiple ways of sending information with a http request. I would not do this with params. But I would put it in the body of your request and access it with req.body[variabel]. If you would send your variables in the body of the POST request please do not forget to add your body parsers, if it would be a normal form: http://expressjs.com/en/api.html#express.urlencoded , if it would be as JSON: http://expressjs.com/en/api.html#express.json

If you want to do it with params you have to access them with req.params[variable name], eg: req.params.Aktiv.

I suggest reading: https://expressjs.com/en/guide/routing.html#route-parameters and https://expressjs.com/en/4x/api.html#req.params

Good luck. I hope this helped.