django api framework getting total pages available

You can create your own pagination serializer:

from django.conf import settings
from rest_framework import pagination
from rest_framework.response import Response


class YourPagination(pagination.PageNumberPagination):

    def get_paginated_response(self, data):
        return Response({
            'links': {
               'next': self.get_next_link(),
               'previous': self.get_previous_link()
            },
            'count': self.page.paginator.count,
            'total_pages': self.page.paginator.num_pages,
            'results': data
        })

In your configuration in settings.py you add YourPagination class as the Default Pagination Class.

REST_FRAMEWORK = {
    'DEFAULT_PAGINATION_CLASS': 'my_project.apps.pagination.YourPagination',
    'PAGE_SIZE': 20
}

References:

• Custom Pagination

You can extend PageNumberPagination class and override get_paginated_response method to get total pages count.

class PageNumberPaginationWithCount(pagination.PageNumberPagination):
    def get_paginated_response(self, data):
        response = super(PageNumberPaginationWithCount, self).get_paginated_response(data)
        response.data['total_pages'] = self.page.paginator.num_pages
        return response

And then in settings.py, add PageNumberPaginationWithCount class as the Default Pagination Class.

REST_FRAMEWORK = {
    'DEFAULT_PAGINATION_CLASS': 'my_project.apps.pagination.PageNumberPaginationWithCount',
    'PAGE_SIZE': 30
}