Sequelize giving TypeError - node.js

Question

So I was casually devoloping a simple node.js app and it was working in my computer just fine.
I had installed heroku toolbelt and the app was running fine when I ran foreman start.
Deploying the app in heroku seems to be giving me some kind of error when conecting with postgres by using sequelize (I'm not even 100% sure that's the cause of the error, but almost). The app crashes and all I have is the heroku logs:
2014-01-05T11:07:39.850661+00:00 app[web.1]: Servidor escuchando al puerto: 25144
2014-01-05T11:07:39.911641+00:00 app[web.1]:
2014-01-05T11:07:39.912039+00:00 app[web.1]: timers.js:103
2014-01-05T11:07:39.912288+00:00 app[web.1]: if (!process.listeners('uncaughtException').length) throw e;
2014-01-05T11:07:39.913123+00:00 app[web.1]: ^
2014-01-05T11:07:39.915970+00:00 app[web.1]: at TransactionManager.getConnectorManager (/app/node_modules/sequelize/lib/transaction-manager.js:25:36)
2014-01-05T11:07:39.915970+00:00 app[web.1]: at TransactionManager.query (/app/node_modules/sequelize/lib/transaction-manager.js:39:15)
2014-01-05T11:07:39.915970+00:00 app[web.1]: at module.exports.Sequelize.query (/app/node_modules/sequelize/lib/sequelize.js:310:36)
2014-01-05T11:07:39.915970+00:00 app[web.1]: at null.<anonymous> (/app/node_modules/sequelize/lib/query-interface.js:901:40)
2014-01-05T11:07:39.915970+00:00 app[web.1]: TypeError: Cannot call method 'setTypeParser' of undefined
2014-01-05T11:07:39.915970+00:00 app[web.1]: at new module.exports.ConnectorManager (/app/node_modules/sequelize/lib/dialects/postgres/connector-manager.js:19:19)
2014-01-05T11:07:39.915970+00:00 app[web.1]: at module.exports.CustomEventEmitter.run (/app/node_modules/sequelize/lib/emitters/custom-event-emitter.js:24:18)
2014-01-05T11:07:39.915970+00:00 app[web.1]: at Timer.list.ontimeout (timers.js:101:19)
2014-01-05T11:07:41.217303+00:00 heroku[web.1]: Process exited with status 1
2014-01-05T11:07:41.234281+00:00 heroku[web.1]: State changed from starting to crashed
The first line ("Servidor escuchando al puerto: XXXX") is actually part of app.js (the main .js file), it's the last few lines:
http.createServer(app).listen(app.get('port'), function(){
console.log('Servidor escuchando al puerto: ' + app.get('port'));
});
As I said before, it runs fine locally (executing foreman start correctly displays it on localhost) but I've had no luck on heroku.
Thanks for any insight and help =)
EDIT: I've managed to trace somewhat the error, seems there is a call to:
pg.types.setTypeParser(20, String)
somewhere in the sequelize module that throws the error since pg.types is undefined
I've checked by simply doing:
console.log(require('pg'));
And it indeed seems there is no field "types"
Is that the way it's meant to be? Am I missing something?

Answer 1

pg.types comes from a dependency of pg:
See package json here:
https://github.com/brianc/node-postgres/blob/master/package.json
This is the package here:
https://www.npmjs.org/package/pg-types
If you don't have it and you installed pg through npm, try removing pg and re-running npm install and see if there are any errors. It should download pg-types tool.
You can see where pg.types specifically is defined here:
https://github.com/brianc/node-postgres/blob/master/lib/index.js