Welcome back! In this lesson, we'll dive into advanced filtering techniques to make our To-Do API even more powerful and user-friendly. You've already learned the basics of filtering in the previous lesson. Here, we will focus on adding more flexible filtering capabilities using the django-filter library, which makes complex queries easier to handle. By the end of this lesson, you will be able to create custom filters to refine your API queries.

Before we get started with advanced filtering, let's briefly recap the initial setup of our Django-based To-Do API. This will ensure we're all on the same page.

Here's the summary code of our current setup:

This setup provides a model we will work with. Now, let's take it a step further by adding powerful filtering options.

The django-filter library allows you to create advanced custom filters. Filters are defined in a FilterSet class that specifies which fields are available for filtering and how filtering should be performed. We will create a separate file to store filters. Inside, we'll define a class to filter To-Do items based on various fields. This class should be inherited from , as follows: