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Fixed #26207 -- Replaced dynamic classes with non-data descriptors for deferred instance loading.

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Anssi Kääriäinen 2016-02-02 11:33:09 +02:00 • committed by Tim Graham
parent dac075e910
commit 7f51876f99
17 changed files with 104 additions and 240 deletions
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11
tests/defer/tests.py
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@ -1,6 +1,6 @@
from __future__ import unicode_literals
from django.db.models.query_utils import DeferredAttribute, InvalidQuery
from django.db.models.query_utils import InvalidQuery
from django.test import TestCase
from .models import (
@ -15,10 +15,7 @@ class AssertionMixin(object):
we examine attribute values. Therefore, this method returns the number
of deferred fields on returned instances.
"""
count = 0
for field in obj._meta.fields:
if isinstance(obj.__class__.__dict__.get(field.attname), DeferredAttribute):
count += 1
count = len(obj.get_deferred_fields())
self.assertEqual(count, num)
@ -45,7 +42,9 @@ class DeferTests(AssertionMixin, TestCase):
# of them except the model's primary key see #15494
self.assert_delayed(qs.only("pk")[0], 3)
# You can use 'pk' with reverse foreign key lookups.
self.assert_delayed(self.s1.primary_set.all().only('pk')[0], 3)
# The related_id is alawys set even if it's not fetched from the DB,
# so pk and related_id are not deferred.
self.assert_delayed(self.s1.primary_set.all().only('pk')[0], 2)
def test_defer_only_chaining(self):
qs = Primary.objects.all()