In this episode, we look at various tips and tricks.

Using polymorphic associations, we can have comments assigned to a post as well as comments assigned to other comments.

Part II - In this episode, we create performant links for adding, accepting/rejecting and removing friends for our social media application.

Part I - In this episode, we create our authentication for users, default view for authenticated users, friendship model, associations and scopes for our social media application.

In this episode, learn how to extract the interactions with an external API into a service object so that code is isolated and interchangeable.