As an application grows in popularity and usage you'll need to scale the application to support your new users and their data. One way in which your application may need to scale is on the database level. In this episode, we look at reading from a replica database while writing to a primary database. We also look at structuring our application top support multiple databases; each containing their own schema.

In this episode, we look at different authorization approaches from the most simple to more complex scenarios.

Prawn is a pure Ruby PDF generation library that provides a lot of great functionality while trying to remain simple and reasonably performant. In this episode, we look at the styling our code and generating PDFs.

User experience is important and there are little things that we can do to help improve this experience. By giving real time feedback on text inputs to approaching limits on fields, the user can modify and update their text accordingly before they submit the form. In this episode, we look at database level, model validations and limiting text input on the client side.

We have a look at integrating the HaveIBeenPwned service with Devise so that our users will some awareness of their password being potentially compromised.