Mastering Ruby on Rails: Building Scalable Web Applications Learn how to implement advanced Active Record features in a Rails application, including scopes, joins, eager loading, and complex queries, to optimize performance and build scalable web applications.

Mastering Flask for modern web applications involves handling requests and responses effectively. This guide explains how to use Flask to handle JSON and XML data in APIs, covering request data handling for JSON, form, and query parameters, as well as returning JSON and XML data in responses.

Writing unit tests for Flask applications and debugging using built-in tools is crucial for ensuring the reliability and maintainability of your code. This topic covers the basics of writing unit tests for views, models, and APIs, as well as debugging using the pdb module.