@classmethod
def check_handler(cls, request):
    """Determine whether the request should be handled by this table."""
    if request.method == 'POST' and 'action' in request.POST:
        table, action, obj_id = cls.parse_action(request.POST['action'])
    elif 'table' in request.GET and 'action' in request.GET:
        table = request.GET['table']
        action = request.GET['action']
        obj_id = request.GET.get('obj_id', None)
    else:
        table = action = obj_id = None
    return table, action, obj_id
