Category: Rails

Heroku Cedar Background Jobs for free!

I’m using Heroku mostly for playing around with latest technology and hosting free apps. Since Heroku “changed their pricing model”: due to the introduction of “the new process model”: some of my apps changed from free to paid, especially those that had some background jobs or nightly crons (I really did not get, why this […]

Migrating an existing App to Heroku Celadon Cedar Stack

It’s currently not possible to do an automated migration from or to the “Heroku Celadon Cedar Stack”: which “started in May”: The only help that you get from Heroku is this: Migrating From Bamboo to Cedar Before migrating to Bamboo, you should make sure your app runs on Ruby 1.9.2. If your app is not […]

Generating PDF from HTML using DocRaptor on Heroku

There comes a time one has to create PDFs for a Rails application. Searching the web will most likely bring you to libraries like “PDF Kit”: and “Wicket PDF”: that use “wkhtmltopdf”: as a driver. If your app is hosted on “Heroku”: you wonder weather wkhtmltopdf is available so that you can use one of […]

Rails, getting started without the hassle

I just changed jobs and am now a Rails developer at “”:, which is an online translation broker. When I started out working on my new desk, I had to setup my iMac development environment. There are tons of articles of “how to compile/install/run stuff like MySQL”:, to get you started on OS X, but […]

Using the Redis addon on Heroku

I am always “playing around with new addons”: offered by Heroku. My latest discovery was the “Redis addon”: that is provided by “Redistogo”: The addon is probably in private beta (“docs”: are still on beta), but since they put up a link to it on their site, I managed to install it to my “personal […]