Export object_list of a django-filters FilterView to CSV

This is a simple way to allow users to export the data they have just filtered using django-filter as CSV.

# Normal View (has a link to export view and keeps GET parameters)
@method_decorator(staff_member_required(login_url='user_login'), name='dispatch')
class PaymentListView(FilterView):
    filterset_class = filters.PaymentFilter
    template_name = "barsys/userarea/payment_list.html"
    paginate_by = 10

# Export View
@method_decorator(staff_member_required(login_url='user_login'), name='dispatch')
class PaymentExportView(FilterView):
    filterset_class = filters.PaymentFilter

    def render_to_response(self, context, **response_kwargs):
        # Could use timezone.now(), but that makes the string much longer
        filename = "{}-export.csv".format(datetime.datetime.now().replace(microsecond=0).isoformat())

        response = HttpResponse(content_type='text/csv')
        response['Content-Disposition'] = 'attachment; filename="{}"'.format(filename)

        writer = csv.writer(response)
        writer.writerow(['created', 'email', 'display_name'])

        for obj in self.object_list:
            writer.writerow([obj.created_date, obj.user.email, obj.user.display_name])

        return response

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