connect ElephantSQL with node.js - node.js

Question

I am new to programming I tried to Use ElephantSql postgres database server in node..but its not connecting..(i used the same code from doumentation.)
const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
const PORT = process.env.PORT || 3001;
const app = express();
app.use(cors())
app.use(bodyParser.json());
var pg = require('pg');
var client = new pg.Client("postgres:/.elephantsql.com:The Actual url");
client.connect(function(err) {
if(err) {
return console.error('could not connect to postgres', err);
}
client.query('SELECT NOW() AS "theTime"', function(err, result) {
if(err) {
return console.error('error running query', err);
}
console.log(result.rows[0].theTime);
// >> output: 2018-08-23T14:02:57.117Z
client.end();
});
});
app.get('/', (req, res) => { res.send('its working') })
app.listen(PORT, () => {
console.log(`app is running on PORT:${PORT}`);
})

Answer 1

Removing client.end() worked for me. You can then use client.query in your routes to run queries.
For example,
app.get('/', async (req, res) => {
try {
const results = await client.query('SELECT * FROM your_table');
res.json(results);
} catch (err) {
console.log(err);
}
}
I would however suggest putting the block of code that you copied in a separate file as the documentation says. Then export client.
For example, we'll call the file elephantsql.js
var pg = require('pg');
var client = new pg.Client("postgres:/.elephantsql.com:The Actual url");
client.connect(function(err) {
if(err) {
return console.error('could not connect to postgres', err);
}
client.query('SELECT NOW() AS "theTime"', function(err, result) {
if(err) {
return console.error('error running query', err);
}
console.log(result.rows[0].theTime);
// >> output: 2018-08-23T14:02:57.117Z
});
});
module.exports = client;
Then, all you need to do is require the client variable wherever your routes are and you can use client.query again.
const client = require('./elephantsql');
app.get('/', async (req, res) => {
try {
const results = await client.query('SELECT * FROM your_table');
res.json(results);
} catch (err) {
console.log(err);
}
}