In this episode, we continue the Trello clone by adding a collaborator invitation mechanism to join working on lists. We look at some tricky ActiveRecord relationships and various solutions.
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.
The Null Object Pattern is an old but good pattern that can help reduce complexity in our applications. In this episode, we'll look at a few different examples.