def box_list(request):
    """
    List all boxs, or create a new box.
    """
    if request.method == 'GET':
        boxes = Box.objects.all()
        serializer = BoxSerializer(boxes, many=True)
        return Response(serializer.data)

    elif request.method == 'POST':
        serializer = BoxSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)