Filtering data in Django and Django REST Framework (DRF) often involves selecting a subset of objects from the database based on certain criteria when accessing an API endpoint. As mentioned, the default behavior of DRF’s generic list views is to return all objects in the queryset for a particular model. However, this is rarely practical for real-world APIs. Filtering allows you to narrow down the data returned, making it more relevant and performant. This is a crucial feature in API development, as it provides flexibility and enhances efficiency by returning only the requested subset of data. The simplest way to filter the queryset of any view that subclasses GenericAPIView is to override the.get_queryset() method. Overriding this method allows you to customize the queryset returned by the view in a number of different ways.