def test_get_value_returns_empty_value(self):
child_instance = RelatedField(read_only=True)
instance = ManyRelatedField(child_relation=child_instance)
instance.bind('pk_list', None)
self.assertEqual(
instance.get_value({'pks': [1, 2, 3]}),
empty
)
def test_to_internal_value_raises_error_for_empty_value(self):
child_instance = RelatedField(read_only=True)
instance = ManyRelatedField(
child_relation=child_instance, allow_empty=False
)
with self.assertRaises(ValidationError):
instance.to_internal_value([])
def test_to_representation(self):
class FakeRelatedField(RelatedField):
def to_representation(self, value):
return value
child_instance = FakeRelatedField(read_only=True)
instance = ManyRelatedField(child_relation=child_instance)
data = [{'pk': 1}, {'pk': 2}, {'pk': 3}]
self.assertEqual(instance.to_representation(data), data)
def test_to_internal_value(self):
class FakeRelatedField(RelatedField):
def to_internal_value(self, data):
return data
child_instance = FakeRelatedField(read_only=True)
instance = ManyRelatedField(child_relation=child_instance)
data = [{'pk': 1}, {'pk': 2}, {'pk': 3}]
self.assertEqual(instance.to_internal_value(data), data)
def test_get_attribute_raises_not_implemented_error(self):
class FakeObject(object):
def __init__(self, pk):
self.pk = pk
def __str__(self):
return str(self.pk)
child_instance = RelatedField(read_only=True)
instance = ManyRelatedField(child_relation=child_instance)
with self.assertRaises(NotImplementedError):
instance.get_attribute(FakeObject(10))
def test_grouped_choices(self):
class FakeObject(object):
def __init__(self, pk):
self.pk = pk
def __str__(self):
return str(self.pk)
class FakeRelatedField(RelatedField):
def get_queryset(self):
return [FakeObject(1), FakeObject(2), FakeObject(3)]
def to_representation(self, value):
return value
child_instance = FakeRelatedField(read_only=True)
instance = ManyRelatedField(child_relation=child_instance)
self.assertEqual(
instance.grouped_choices,
collections.OrderedDict([('1', '1'), ('2', '2'), ('3', '3')])
)
def test_to_internal_value_raises_error_for_not_a_list_argument(self):
child_instance = RelatedField(read_only=True)
instance = ManyRelatedField(child_relation=child_instance)
with self.assertRaises(ValidationError):
instance.to_internal_value(object())
def test_init_raises_assertion_error_for_missed_child_argument(self):
with self.assertRaises(AssertionError):
ManyRelatedField()