Fixed #10792 -- Ensured that ModelChoiceFields don't provide an empty option...

    def __init__(self, queryset, empty_label=u"---------", cache_choices=False,

                 required=True, widget=None, label=None, initial=None,

                 help_text=None, to_field_name=None, *args, **kwargs):

        if required and (initial is not None):

            self.empty_label = None

        else:

            self.empty_label = empty_label

        self.cache_choices = cache_choices

        # No empty label

        field2 = forms.ModelChoiceField(queryset=..., empty_label=None)

   Note that if a ``ModelChoiceField`` is required and has a default

   initial value, no empty choice is created (regardless of the value

   of ``empty_label``).

``ModelMultipleChoiceField``

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    """For ModelChoiceField and ModelMultipleChoiceField tests."""

    name = models.CharField(max_length=10)

class ChoiceOptionModel(models.Model):

    """Destination for ChoiceFieldModel's ForeignKey.

    Can't reuse ChoiceModel because error_message tests require that it have no instances."""

    name = models.CharField(max_length=10)

class ChoiceFieldModel(models.Model):

    """Model with ForeignKey to another model, for testing ModelForm

    generation with ModelChoiceField."""

    choice = models.ForeignKey(ChoiceOptionModel, blank=False,

                               default=lambda: ChoiceOptionModel.objects.all()[0])

class FileModel(models.Model):

    file = models.FileField(storage=temp_storage, upload_to='tests')

>>> obj.def_date

datetime.date(1999, 3, 2)

>>> shutil.rmtree(temp_storage_location)

In a ModelForm with a ModelChoiceField, if the model's ForeignKey has blank=False and a default,

no empty option is created (regression test for #10792).

First we need at least one instance of ChoiceOptionModel:

>>> ChoiceOptionModel.objects.create(name='default')

<ChoiceOptionModel: ChoiceOptionModel object>

>>> class ChoiceFieldForm(ModelForm):

...     class Meta:

...         model = ChoiceFieldModel

>>> list(ChoiceFieldForm().fields['choice'].choices)

[(1, u'ChoiceOptionModel object')]

"""}