django/django — pull request #1048 by mrmachine (2013-05-07 09:12:52+00:00)
Title: Fixed #15511 -- Allow optional subfields on ``MultiValueField` subclasse...

...s.

MultiValueField gets a new ``all_required`` keyword argument that defaults to
``True`` for backwards compatibility. If set to ``False``, individual subfields
can be made optional, and a new ``incomplete`` validation error will be raised
if any required subfields have empty values.