Got the Invalid order_by arguments exception if the language with - symbol.

[WayneSan]

It might get an Invalid order_by arguments exception if ordering the queryset with the translated field.

For example:

Book.objects.order_by('title_zh-tw')

Will get the exception:

FieldError: Invalid order_by arguments: ['title_zh-tw']

Because the definition of ORDER_PATTERN in django.db.models.sql.constants is:

ORDER_PATTERN = re.compile(r'\?|[-+]?[.\w]+$')