Fixed #9462 -- Set the instance in an inline formset correctly so that None...

    def __init__(self, data=None, files=None, instance=None,

                 save_as_new=False, prefix=None):

        from django.db.models.fields.related import RelatedObject

        if instance is None:

            self.instance = self.model()

        else:

            self.instance = instance

        self.save_as_new = save_as_new

        # is there a better way to get the object descriptor?

    date_joined = models.DateTimeField(default=datetime.datetime.now)

    karma = models.IntegerField()

# models for testing a null=True fk to a parent

class Team(models.Model):

    name = models.CharField(max_length=100)

class Player(models.Model):

    team = models.ForeignKey(Team, null=True)

    name = models.CharField(max_length=100)

    def __unicode__(self):

        return self.name

__test__ = {'API_TESTS': """

>>> from datetime import date

>>> formset.is_valid()

True

# inlineformset_factory tests with fk having null=True. see #9462.

# create some data that will exbit the issue

>>> team = Team.objects.create(name=u"Red Vipers")

>>> Player(name="Timmy").save()

>>> Player(name="Bobby", team=team).save()

>>> PlayerInlineFormSet = inlineformset_factory(Team, Player)

>>> formset = PlayerInlineFormSet()

>>> formset.get_queryset()

[]

>>> formset = PlayerInlineFormSet(instance=team)

>>> formset.get_queryset()

[<Player: Bobby>]

"""}