@property
    def order_by(self):
        fields = self.field.split(",")
        if self.direction == "desc":
            return tuple(["-" + f for f in fields])
        return tuple(fields)
Return the ``order_by`` tuple appropriate for this sort.
dataset/ETHPy150Open mozilla/moztrap/moztrap/view/lists/sort.py/Sort.order_by