Gennady Karev

list(Episode.objects.values_list(
                'series_id', flat=True
            ).filter(
                series__series_type='series'
            ).annotate(
                Max("date_modified")
            ).order_by(
                '-date_modified__max'
            ))

{% url 'myapp:export_company_profit' start_date=start_date end_date='end_date' as the_url %}
<button type="button" class="btn btn-default"><a href="{{ the_url }}">Excel</a></button>