EconnRefused Heroku Trailhead Quick Start: Heroku Connect Change and Redeploy the Application - heroku

Question

working through the salesforce trailhead on Heroku Connect. Everything has worked up until the step Change and Redeploy the Application. After stopping the application and modifying the server.js file, I am unable to connect/update the database records. restored the server.js file, same issue. I am on windows 7, npm --version = 4.6.1, node --version = v8.11.1, git --version = 2.14.2.windows.2. Any idea what might be causing the following error:
{
Error: connect ECONNREFUSED 127.0.0.1:5432
at Object._errnoException (util.js:1022:11)
at _exceptionWithHostPort (util.js:1044:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1198:14)
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 5432
}
Thanks!
Here's the commands to set/start the application:
SET DATABASE_URL=`heroku config:get DATABASE_URL`
SET PGSSLMODE=require
npm start
Here's the contents of the server.js file:
var express = require('express');
var bodyParser = require('body-parser');
var pg = require('pg');
var app = express();
app.set('port', process.env.PORT || 5000);
app.use(express.static('public'));
app.use(bodyParser.json());
app.post('/update', function(req, res) {
pg.connect(process.env.DATABASE_URL, function (err, conn, done) {
// watch for any connect issues
if (err) console.log(err);
conn.query(
'UPDATE salesforce.Contact SET Phone = $1, MobilePhone = $1 WHERE LOWER(FirstName) = LOWER($2) AND LOWER(LastName) = LOWER($3) AND
LOWER(Email) = LOWER($4)',
[req.body.phone.trim(), req.body.firstName.trim(),
req.body.lastName.trim(), req.body.email.trim()],
function(err, result) {
if (err != null || result.rowCount == 0) {
conn.query('INSERT INTO salesforce.Contact (Phone,
MobilePhone, FirstName, LastName, Email) VALUES ($1, $2, $3, $4, $5)',
[req.body.phone.trim(), req.body.phone.trim(),
req.body.firstName.trim(), req.body.lastName.trim(),
req.body.email.trim()],
function(err, result) {
done();
if (err) {
res.status(400).json({error: err.message});
}
else {
// this will still cause jquery to display 'Record
updated!'
// eventhough it was inserted
res.json(result);
}
});
}
else {
done();
res.json(result);
}
}
);
});
});
app.listen(app.get('port'), function () {
console.log('Express server listening on port ' + app.get('port'));
});

Answer 1

You're attempting to connect to a local database (127.0.0.1) where you need to connect to the Heroku Postgres instance. This is the relevant config from the application code. Make sure that server.js is connecting to DATABASE_URL which Heroku manages on your behalf.