Manuel van Rijn

Bit blog

Rails belongs_to to has_many

Today I had to change a belongs_to associate to an has_and_belongs_to_many in a Rails project I’m currently working on. Not that hard you would say, but there were some catches for deploying/migrating these changes to the production environment.

In this post I’d like to explain how to achieve this without having to do multiple deployments of your model to maintain a consistent database schema and model.

Scalable Heroku worker for Sidekiq

In this post I’d like to show you guys how to deploy your Rails application to Heroku with a Sidekiq worker that only gets initiated when there are tasks in the queue to process.

Our goal is to start a worker when a task is added to the queue and to destroy the worker after its done processing the queue tasks. This will result in a much lower bill at the end of the month because the worker doesn’t have to be up the whole month.