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Code Issues 32 Releases Wiki Activity

Avoided creation of deferred model from another deferred model

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Also never create deferred model when no attrs are deferred.
This commit is contained in:
Anssi Kääriäinen
2014-07-14 17:53:23 +03:00
parent 5b0375ec3e
commit f7dba61881
2 changed files with 20 additions and 1 deletions
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13
tests/defer_regress/tests.py
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@@ -6,6 +6,7 @@ from django.apps import apps
from django.contrib.contenttypes.models import ContentType
from django.contrib.sessions.backends.db import SessionStore
from django.db.models import Count
from django.db.models.query_utils import deferred_class_factory, DeferredAttribute
from django.test import TestCase, override_settings
from .models import (
@@ -233,7 +234,6 @@ class DeferRegressionTest(TestCase):
self.assertEqual(len(qs), 1)
def test_deferred_class_factory(self):
from django.db.models.query_utils import deferred_class_factory
new_class = deferred_class_factory(
Item,
('this_is_some_very_long_attribute_name_so_modelname_truncation_is_triggered',))
@@ -241,6 +241,17 @@ class DeferRegressionTest(TestCase):
new_class.__name__,
'Item_Deferred_this_is_some_very_long_attribute_nac34b1f495507dad6b02e2cb235c875e')
def test_deferred_class_factory_already_deferred(self):
deferred_item1 = deferred_class_factory(Item, ('name',))
deferred_item2 = deferred_class_factory(deferred_item1, ('value',))
self.assertIs(deferred_item2._meta.proxy_for_model, Item)
self.assertFalse(isinstance(deferred_item2.__dict__.get('name'), DeferredAttribute))
self.assertTrue(isinstance(deferred_item2.__dict__.get('value'), DeferredAttribute))
def test_deferred_class_factory_no_attrs(self):
deferred_cls = deferred_class_factory(Item, ())
self.assertFalse(deferred_cls._deferred)
class DeferAnnotateSelectRelatedTest(TestCase):
def test_defer_annotate_select_related(self):