def get_queryset(self):
        """Optionally restricts the returned articles by filtering against a `topic`
        query parameter in the URL."""

        # Get base queryset from DispatchPublishableMixin
        queryset = self.get_publishable_queryset()

        # Optimize queries by prefetching related data
        queryset = queryset \
            .select_related('featured_image', 'featured_video', 'topic', 'section', 'subsection') \
            .prefetch_related(
                'tags',
                'featured_image__image__authors',
                'authors'
            )

        queryset = queryset.order_by('-updated_at')

        q = self.request.query_params.get('q', None)
        section = self.request.query_params.get('section', None)
        tags = self.request.query_params.getlist('tags', None)
        author = self.request.query_params.get('author', None)

        if q is not None:
            queryset = queryset.filter(headline__icontains=q)

        if section is not None:
            queryset = queryset.filter(section_id=section)

        if tags is not None:
            for tag in tags:
                queryset = queryset.filter(tags__id=tag)

        if author is not None:
            queryset = queryset.filter(authors__person_id=author)

        return queryset
Optionally restricts the returned articles by filtering against a `topic`
        query parameter in the URL.