code: def build_sort(self, **kwargs):
          ''' Break url parameters and turn into sort arguments '''
          sort = []
          order = kwargs.get('order_by', None)
          if order:
              if type(order) is list:
                  order = order[0]
              if order[:1] == '-':
                  sort.append((order[1:], -1))
              else:
                  sort.append((order, 1))
          return sort