[1.1.X] Fixed #12546. Objects with a __len__ that returns 0 can now be...

        return first_choice + list(self.flatchoices)

    def _get_val_from_obj(self, obj):

        if obj:

        if obj is not None:

            return getattr(obj, self.attname)

        else:

            return self.get_default()

    parent = models.OneToOneField(BaseModel)

    child_data = models.IntegerField()

class LengthModel(models.Model):

    data = models.IntegerField()

    def __len__(self):

        return self.data

"""

import unittest, datetime

import datetime

import unittest

from cStringIO import StringIO

from django.utils.functional import curry

    (inherited_obj, 900, InheritAbstractModel, {'child_data':37,'parent_data':42}),

    (inherited_obj, 910, ExplicitInheritBaseModel, {'child_data':37,'parent_data':42}),

    (inherited_obj, 920, InheritBaseModel, {'child_data':37,'parent_data':42}),

    (data_obj, 1004, LengthModel, 0),

    (data_obj, 1005, LengthModel, 1),

]

# Because Oracle treats the empty string as NULL, Oracle is expected to fail