In this episode, we build our associations and organize our mathematical business logic.

In this episode we create a referral system with permanent links. Users can sign up with referral links which tracks the relationship between the referer and the person referred.

In this episode, we look at 3 different ways of importing data into a Rails application; each having their own use cases, drawbacks and benefits.

Sometimes our models get so large that they become unmaintainable. In this episode, we look at how we can slim down the size of the models without losing functionality.

Add an activity feed to your application with Public Activity.