Knex Postgres Heroku - Error: Unable to Acquire Connection - postgresql

Question

I'm aware of the post and similar question here(Knex Migration Postgres Heroku - Error: Unable to Acquire Connection) I'm not sure what is missing in my .env I just basically have the following line in there : HOST= http://localhost:3000.
My knexfile:
module.exports = {
development: {
client: 'pg',
connection: 'postgres://localhost/eka_dev',
migrations: {
tableName: 'knex_migrations'
}
},
test: {
client: 'pg',
connection: 'postgres://localhost/eka_test',
migrations: {
tableName: 'knex_migrations'
}
},
production: {
client: 'pg',
connection: process.env.DATABASE_URL,
migrations: {
tableName: 'knex_migrations'
}
}
};
Knex file:
const environment = process.env.NODE_ENV || 'development';
const knexConfig = require('./knexfile')[environment];
const knex = require('knex')(knexConfig);
module.exports = knex;
app.js file:
const express= require('express');
const PORT = process.env.PORT || 3000;
const app = express();
const bodyParser = require('body-parser');
const path = require('path');
const cors = require('cors');
const usersRoute = require('./routes/users');
if (process.env.NODE_ENV !== 'production') {
require('dotenv').config();
}
const allowCrossDomain = function (req, res, next) {
res.header('Access-Control-Allow-Credentials', true);
res.header('Access-Control-Allow-Origin', req.headers.origin);
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
res.header('Access-Control-Allow-Headers', 'X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept');
if (req.method == 'OPTIONS') {
res.send(200);
} else {
next();
}
};
app.use(allowCrossDomain);
app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(express.static(path.join(__dirname, 'build')));
app.use('/api', usersRoute);
app.listen(PORT, () => {
console.log(`Express server listening on port ${PORT}`);
});
module.exports = app;

Answer 1

You need to define NODE_ENV=production environment variable in your Heroku setup and check what is the contents of DATABASE_URLvariable.