Passing a get parameter to express route

Question

I'm new to nodejs and express and trying to build a simple functionality

I have this piece of code which successfully sends my get requests to the appropriate route (in this case a service where I have a mysql query written)

app.get('/requests', service.getRequests);

This works with simple get request like http://localhost:5000/requests

I'm wondering how I can get a parameter from the get request and pass it in the route handler ?

For example: something like http://localhost:5000/requests?id=123 I'd like to pass in the id to the service.getRequests function, but the below doesn't work -

app.get('/request',function(req,res){
  res.send(service.getRequests(req));
});

Here's how service.js (part of it) looks like

exports.getRequests = function(req,res){
  //console.log(req.id);
  connection.connect()
  connection.query('SELECT * FROM table1 t where t.uid = ? LIMIT 10',[req.id], function (err, result, fields) {
    if (err) throw err
    res.json({ results: result });
  })
  connection.end()
}

EDIT : My question specifically is not how to get a GET parameter but how do I use it with res.send / call a service with this parameter, specifically the below line -

app.get('/request',function(req,res){
  res.send(service.getRequests(req));
});

Answer 1

It's not clear which node module you're using to send queries to PostgreSQL. But, assuming you're using pg , then the problem is you should put the param as follows:

SELECT * FROM table1 t where t.uid = $1 LIMIT 10

Answer 2

You can configure your endpoint to take a variable like this

http://localhost:5000/requests/123

app.get('/request/:id',function(req,res){
    const id = req.params.id;
    console.log(id); // should display 123
});