views.v2.py

class Csv(View):

    def get(self, request):
        sales = Sales.objects.all()
        headers = [(h.column) for h in Sales._meta.get_fields()]
        csv_array = Generate(request).csv_file(headers=headers, data=sales)
        if os.path.exists(csv_array[1]):
            with open(csv_array[1], 'r') as csv:
                response = HttpResponse(csv.read(), content_type="text/csv")
                response["Content-Disposition"] = f'attachment; filename={csv_array[0]}'
                return response
        else:
            return HttpResponse("File Does Not Exist")