Validation of files that are uploaded can provide a better user experience as it sets the expectations of what kinds of files, their sizes and if they're even required. In this episode, we'll look at creating different types of validators for Active Storage.

Transactions are protective blocks where SQL statements are only permanent if they can all succeed as one atomic action. In this episode, we explore ActiveRecord Transactions and how to use them.

In this episode, we take a user privacy focused approach to tracking emails for unique opens and view counts. We'll look at how we can track these emails without invading the user's privacy and get meaningful metrics.

Routing in Rails is small but an important part of our applications. The Rails router recognizes URLs and dispatches them to a controller's action, or to a Rack application. It can also generate paths and URLs, avoiding the need to hardcode strings in your views.

There's many benefits to running your own cache and proxy for Ruby gems. In this episode, we look at provisioning, configuring our system and projects to use a Gem in a Box instance.