mirror of
https://github.com/django/django.git
synced 2024-11-20 08:24:58 +00:00
47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
from django.test import TestCase
|
|
|
|
from .models import Source, Item
|
|
|
|
|
|
class ReverseSingleRelatedTests(TestCase):
|
|
"""
|
|
Regression tests for an object that cannot access a single related
|
|
object due to a restrictive default manager.
|
|
"""
|
|
|
|
def test_reverse_single_related(self):
|
|
|
|
public_source = Source.objects.create(is_public=True)
|
|
public_item = Item.objects.create(source=public_source)
|
|
|
|
private_source = Source.objects.create(is_public=False)
|
|
private_item = Item.objects.create(source=private_source)
|
|
|
|
# Only one source is available via all() due to the custom default manager.
|
|
self.assertQuerysetEqual(
|
|
Source.objects.all(),
|
|
["<Source: Source object>"]
|
|
)
|
|
|
|
self.assertEqual(public_item.source, public_source)
|
|
|
|
# Make sure that an item can still access its related source even if the default
|
|
# manager doesn't normally allow it.
|
|
self.assertEqual(private_item.source, private_source)
|
|
|
|
# If the manager is marked "use_for_related_fields", it'll get used instead
|
|
# of the "bare" queryset. Usually you'd define this as a property on the class,
|
|
# but this approximates that in a way that's easier in tests.
|
|
Source.objects.use_for_related_fields = True
|
|
try:
|
|
private_item = Item.objects.get(pk=private_item.pk)
|
|
self.assertRaises(Source.DoesNotExist, lambda: private_item.source)
|
|
finally:
|
|
Source.objects.use_for_related_fields = False
|
|
|
|
def test_hasattr_single_related(self):
|
|
# The exception raised on attribute access when a related object
|
|
# doesn't exist should be an instance of a subclass of `AttributeError`
|
|
# refs #21563
|
|
self.assertFalse(hasattr(Item(), 'source'))
|