list.py 文件源码

def order(self):
        if self.sort_field and isinstance(self.sort_field, Field):
            if self.sort_order and self.sort_field:
                return self.sort_field
            elif not self.sort_order and self.sort_field:
                return -self.sort_field
        elif self.sort_field:
            return self.sort_field
        return None