views.py

@login_required
def delete(request, msg_pk):
	msg = get_object_or_404(Message, pk=msg_pk)
	## is owner?
	if request.user != msg.user and request.user != msg.to:
		raise Http404()
	# Sender or Receiver ?
	if msg.delete_status == 2:
		msg.delete_status = 3
	elif request.user == msg.user and request.user != msg.to:
		msg.delete_status = '1'
	elif request.user == msg.to:
		msg.delete_status = '2'
					
	msg.save()
	# Send sucessfull message for user with messages framework
	return HttpResponse(status=200)