title: Trying to connect my node.js to Heroku PostgreSQL database. Following Heroku Postgres tutorial
body: <p>I'm following these two Heroku tutorials:</p>
  
  <p><a href="https://devcenter.heroku.com/articles/getting-started-with-nodejs" rel="noreferrer">https://devcenter.heroku.com/articles/getting-started-with-nodejs</a></p>
  
  <p>and</p>
  
  <p><a href="https://devcenter.heroku.com/articles/heroku-postgresql" rel="noreferrer">https://devcenter.heroku.com/articles/heroku-postgresql</a> </p>
  
  <p>I have the 'hello world' app working. But I am getting an error when I add the node.js code to connect to postgreSQL. </p>
  
  <p>My package.json</p>
  
  <pre><code>{
    "name": "node-example",
    "version": "0.0.1",
    "dependencies": {
      "pg": "2.x",
      "express": "3.1.x"
    },
    "engines": {
      "node": "0.10.x",
      "npm": "1.2.x"
    }
  }
  </code></pre>
  
  <p>My web.js</p>
  
  <pre><code>var express = require("express");
  var app = express();
  app.use(express.logger());
  
  app.get('/', function(request, response) {
    response.send('Hello World!');
  });
  
  var port = process.env.PORT || 5000;
  app.listen(port, function() {
    console.log("Listening on " + port);
  });
  
  var pg = require('pg');
  
  pg.connect(process.env.DATABASE_URL, function(err, client, done) {
    client.query('SELECT * FROM your_table', function(err, result) {
      done();
      if(err) return console.error(err);
      console.log(result.rows);
    });
  });
  </code></pre>
  
  <p>My Heroku postgres database is working well and I can connect to it directly with </p>
  
  <pre><code>heroku pg:psql
  </code></pre>
  
  <p>Here are my logs:</p>
  
  <pre><code>2013-09-29T13:13:34.777156+00:00 heroku[web.1]: State changed from starting to up
  2013-09-29T13:13:34.784018+00:00 app[web.1]: 
  2013-09-29T13:13:34.787193+00:00 app[web.1]: events.js:72
  2013-09-29T13:13:34.787469+00:00 app[web.1]:         throw er; // Unhandled 'error' event
  2013-09-29T13:13:34.787642+00:00 app[web.1]:               ^
  2013-09-29T13:13:34.790791+00:00 app[web.1]: error: relation "junk" does not exist
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at Connection.parseE (/app/node_modules/pg/lib/connection.js:546:11)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at Connection.parseMessage (/app/node_modules/pg/lib/connection.js:375:17)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at null.&lt;anonymous&gt; (/app/node_modules/pg/lib/connection.js:92:20)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at Socket.EventEmitter.emit (events.js:95:17)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at Socket.&lt;anonymous&gt; (_stream_readable.js:746:14)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at Socket.EventEmitter.emit (events.js:92:17)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at emitReadable_ (_stream_readable.js:408:10)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at emitReadable (_stream_readable.js:404:5)
  2013-09-29T13:13:34.790791+00:00 app[web.1]:     at readableAddChunk (_stream_readable.js:165:9)
  2013-09-29T13:13:34.790968+00:00 app[web.1]:     at Socket.Readable.push (_stream_readable.js:127:10)
  2013-09-29T13:13:36.511975+00:00 heroku[web.1]: Process exited with status 8
  2013-09-29T13:13:36.527681+00:00 heroku[web.1]: State changed from up to crashed
  2013-09-29T13:21:22+00:00 heroku[slug-compiler]: Slug compilation started
  2013-09-29T13:21:38+00:00 heroku[slug-compiler]: Slug compilation finished
  2013-09-29T13:21:39.239935+00:00 heroku[web.1]: State changed from crashed to starting
  2013-09-29T13:21:40.589773+00:00 heroku[web.1]: Starting process with command `node web.js`
  2013-09-29T13:21:41.345806+00:00 app[web.1]: Listening on 20977
  2013-09-29T13:21:41.368323+00:00 app[web.1]: { [error: relation "your_table" does not exist]
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   length: 101,
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   detail: undefined,
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   severity: 'ERROR',
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   hint: undefined,
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   position: '15',
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   code: '42P01',
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   name: 'error',
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   internalPosition: undefined,
  2013-09-29T13:21:41.368512+00:00 app[web.1]:   where: undefined,
  2013-09-29T13:21:41.368512+00:00 app[web.1]:   file: 'parse_relation.c',
  2013-09-29T13:21:41.368512+00:00 app[web.1]:   line: '864',
  2013-09-29T13:21:41.368323+00:00 app[web.1]:   internalQuery: undefined,
  2013-09-29T13:21:41.368512+00:00 app[web.1]:   routine: 'parserOpenTable' }
  2013-09-29T13:21:41.938926+00:00 heroku[web.1]: State changed from starting to up
  2013-09-29T13:21:38.600520+00:00 heroku[api]: Deploy 95a0a35 by *********@gmail.com
  2013-09-29T13:21:38.625733+00:00 heroku[api]: Release v17 created by *******@gmail.com
  2013-09-29T13:22:08.383050+00:00 heroku[router]: at=info method=GET path=/ host=pure-lake-7106.herokuapp.com fwd="58.7.243.156" dyno=web.1 connect=3ms service=6ms status=200 bytes=12
  2013-09-29T13:22:08.383327+00:00 app[web.1]: - - - [Sun, 29 Sep 2013 13:22:08 GMT] "GET / HTTP/1.1" 200 12 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/28.0.1500.71 Chrome/28.0.1500.71 Safari/537.36"
  2013-09-29T13:22:10.046808+00:00 app[web.1]: - - - [Sun, 29 Sep 2013 13:22:10 GMT] "GET /favicon.ico HTTP/1.1" 404 - "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/28.0.1500.71 Chrome/28.0.1500.71 Safari/537.36"
  2013-09-29T13:22:10.049179+00:00 heroku[router]: at=info method=GET path=/favicon.ico host=pure-lake-7106.herokuapp.com fwd="58.7.243.156" dyno=web.1 connect=1ms service=3ms status=404 bytes=34
  2013-09-29T13:29:40+00:00 heroku[slug-compiler]: Slug compilation started
  2013-09-29T13:30:07.484077+00:00 heroku[api]: Deploy a2cc795 by xxxxxxxxxxx@gmail.com
  2013-09-29T13:30:07.515481+00:00 heroku[api]: Release v18 created by xxxxxxxxx@gmail.com
  2013-09-29T13:30:07+00:00 heroku[slug-compiler]: Slug compilation finished
  2013-09-29T13:30:08.016355+00:00 heroku[web.1]: State changed from up to starting
  2013-09-29T13:30:10.017792+00:00 heroku[web.1]: Starting process with command `node web.js`
  2013-09-29T13:30:10.099473+00:00 heroku[web.1]: Stopping all processes with SIGTERM
  2013-09-29T13:30:11.008770+00:00 app[web.1]: Listening on 47344
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   name: 'error',
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   length: 101,
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   severity: 'ERROR',
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   code: '42P01',
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   detail: undefined,
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   position: '15',
  2013-09-29T13:30:11.065531+00:00 app[web.1]: { [error: relation "your_table" does not exist]
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   internalPosition: undefined,
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   internalQuery: undefined,
  2013-09-29T13:30:11.065840+00:00 app[web.1]:   where: undefined,
  2013-09-29T13:30:11.065840+00:00 app[web.1]:   file: 'parse_relation.c',
  2013-09-29T13:30:11.065840+00:00 app[web.1]:   line: '864',
  2013-09-29T13:30:11.065840+00:00 app[web.1]:   routine: 'parserOpenTable' }
  2013-09-29T13:30:11.065531+00:00 app[web.1]:   hint: undefined,
  2013-09-29T13:30:11.482704+00:00 heroku[web.1]: State changed from starting to up
  2013-09-29T13:30:11.651117+00:00 heroku[web.1]: Process exited with status 143
  2013-09-29T13:30:17.729604+00:00 app[web.1]: - - - [Sun, 29 Sep 2013 13:30:17 GMT] "GET / HTTP/1.1" 200 12 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/28.0.1500.71 Chrome/28.0.1500.71 Safari/537.36"
  2013-09-29T13:30:19.361615+00:00 heroku[router]: at=info method=GET path=/favicon.ico host=pure-lake-7106.herokuapp.com fwd="58.7.243.156" dyno=web.1 connect=1ms service=3ms status=404 bytes=34
  2013-09-29T13:30:19.364457+00:00 app[web.1]: - - - [Sun, 29 Sep 2013 13:30:19 GMT] "GET /favicon.ico HTTP/1.1" 404 - "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/28.0.1500.71 Chrome/28.0.1500.71 Safari/537.36"
  2013-09-29T13:30:17.728815+00:00 heroku[router]: at=info method=GET path=/ host=pure-lake-7106.herokuapp.com fwd="58.7.243.156" dyno=web.1 connect=1ms service=19ms status=200 bytes=12
  2013-09-29T13:32:28+00:00 heroku[slug-compiler]: Slug compilation started
  2013-09-29T13:32:43.338858+00:00 heroku[api]: Deploy d4cf2ba by xxxxxxxx@gmail.com
  2013-09-29T13:32:43.359317+00:00 heroku[api]: Release v19 created by xxxxxxxx@gmail.com
  2013-09-29T13:32:43+00:00 heroku[slug-compiler]: Slug compilation finished
  2013-09-29T13:32:43.746015+00:00 heroku[web.1]: State changed from up to starting
  2013-09-29T13:32:45.354842+00:00 heroku[web.1]: Starting process with command `node web.js`
  2013-09-29T13:32:46.098651+00:00 app[web.1]: Listening on 37156
  2013-09-29T13:32:47.127328+00:00 app[web.1]: { [error: relation "your_table" does not exist]
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   code: '42P01',
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   name: 'error',
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   length: 101,
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   hint: undefined,
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   position: '15',
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   severity: 'ERROR',
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   detail: undefined,
  2013-09-29T13:32:47.127561+00:00 app[web.1]:   where: undefined,
  2013-09-29T13:32:47.127561+00:00 app[web.1]:   routine: 'parserOpenTable' }
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   internalPosition: undefined,
  2013-09-29T13:32:47.127328+00:00 app[web.1]:   internalQuery: undefined,
  2013-09-29T13:32:47.127561+00:00 app[web.1]:   file: 'parse_relation.c',
  2013-09-29T13:32:47.127561+00:00 app[web.1]:   line: '864',
  2013-09-29T13:32:47.197293+00:00 heroku[web.1]: State changed from starting to up
  2013-09-29T13:32:50.505267+00:00 heroku[web.1]: Stopping all processes with SIGTERM
  2013-09-29T13:32:53.246120+00:00 heroku[web.1]: Process exited with status 143
  2013-09-29T14:39:50.833246+00:00 heroku[web.1]: Idling
  2013-09-29T14:39:52.828292+00:00 heroku[web.1]: Stopping all processes with SIGTERM
  2013-09-29T14:39:54.545662+00:00 heroku[web.1]: Process exited with status 143
  2013-09-29T14:39:54.559151+00:00 heroku[web.1]: State changed from up to down
  </code></pre>
  
  <p>I get this erroe when I do a foreman start</p>
  
  <pre><code>p$ foreman start
  12:39:41 web.1  | started with pid 13983
  12:39:41 web.1  | Listening on 5000
  12:39:41 web.1  | /home/roland/github/heroku_app/web.js:18
  12:39:41 web.1  |   client.query('SELECT * FROM your_table', function(err, result) {
  12:39:41 web.1  |          ^
  12:39:41 web.1  | TypeError: Cannot call method 'query' of null
  12:39:41 web.1  |     at /home/roland/github/heroku_app/web.js:18:10
  12:39:41 web.1  |     at /home/roland/github/heroku_app/node_modules/pg/lib/pool.js:54:25
  12:39:41 web.1  |     at /home/roland/github/heroku_app/node_modules/pg/node_modules/generic-pool/lib/generic-pool.js:271:11
  12:39:41 web.1  |     at /home/roland/github/heroku_app/node_modules/pg/lib/pool.js:27:26
  12:39:41 web.1  |     at null.&lt;anonymous&gt; (/home/roland/github/heroku_app/node_modules/pg/lib/client.js:169:9)
  12:39:41 web.1  |     at EventEmitter.emit (events.js:95:17)
  12:39:41 web.1  |     at null.&lt;anonymous&gt; (/home/roland/github/heroku_app/node_modules/pg/lib/connection.js:97:12)
  12:39:41 web.1  |     at Socket.EventEmitter.emit (events.js:95:17)
  12:39:41 web.1  |     at Socket.&lt;anonymous&gt; (_stream_readable.js:746:14)
  12:39:41 web.1  |     at Socket.EventEmitter.emit (events.js:92:17)
  12:39:41 web.1  | exited with code 8
  12:39:41 system | sending SIGTERM to all processes
  SIGTERM received
  </code></pre>
  
  <p>EDIT my console.logs;</p>
  
  <pre><code>var express = require("express");
  var app = express();
  app.use(express.logger());
  
  app.get('/', function(request, response) {
    response.send('Hello World!');
    console.log("hello roland");
  });
  
  var port = process.env.PORT || 5000;
  app.listen(port, function() {
    console.log("Listening on " + port);
  });
  
  var pg = require('pg');
  
  
  pg.connect(process.env.DATABASE_URL, function(err, client, done) {
     console.log(err+"!!!!!!!!!!!!!!!");
    client.query('SELECT * FROM your_table', function(err, result) {
      done();
      if(err) return console.error(err);
      console.log(result.rows);
    });
  });
  </code></pre>