def add_ordering(self, *ordering):
        errors = []
        for item in ordering:
            if not hasattr(item, 'resolve_expression') and not ORDER_PATTERN.match(item):
                errors.append(item)
            if getattr(item, 'contains_aggregate', False):
                raise FieldError(
                    'Using an aggregate in order_by() without also including '
                    'it in annotate() is not allowed: %s' % item
                )
        if errors:
            raise FieldError('Invalid order_by arguments: %s' % errors)
        if ordering:
            self.order_by.extend(ordering)
        else:
            self.default_ordering = False
Adds items from the 'ordering' sequence to the query's "order by"
dataset/ETHPy150Open django/django/django/db/models/sql/query.py/Query.add_ordering