Filtering and Ordering in Django

 Filtering and Ordering in Django

DRF includes filters and ordering classes that can be used to filter and order result sets. Here's an example view that filters books by author:

python

from rest_framework import generics, filters

from .models import Book

from .serializers import BookSerializer

class BookList(generics.ListCreateAPIView):

    queryset = Book.objects.all()

    serializer_class = BookSerializer

    filter_backends = [filters.SearchFilter]

    search_fields = ['author']

In this example, we specify the SearchFilter class as the filter backend and the author field as the search field. This allows clients to filter the result set by author using the ?search= query parameter.

We can also order the result set by adding the OrderingFilter class:

python

class BookList(generics.ListCreateAPIView):

    queryset = Book.objects.all()

    serializer_class = BookSerializer

    filter_backends = [filters.SearchFilter, filters.OrderingFilter]

    search_fields = ['author']

    ordering_fields = ['title', 'pub_date']

In this example, we specify the OrderingFilter class as the ordering backend and the title and pub_date fields as the ordering fields. This allows clients to order the result set by title or publication date using the ?ordering= query parameter.