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Fixed #28462 -- Decreased memory usage with ModelAdmin.list_editable. 

Regression in 917cc288a3.
This commit is contained in:
Adam Donaghy 2018-05-03 23:41:04 +10:00 committed by Tim Graham
parent e1ebd22558
commit b18650a263
6 changed files with 116 additions and 4 deletions
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1
AUTHORS
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@ -11,6 +11,7 @@ answer newbie questions, and generally made Django that much better:
Abeer Upadhyay <ab.esquarer@gmail.com>
Abhishek Gautam <abhishekg1128@yahoo.com>
Adam Bogdał <adam@bogdal.pl>
Adam Donaghy
Adam Johnson <https://github.com/adamchainz>
Adam Malinowski <http://adammalinowski.co.uk>
Adam Vandenberg

25
django/contrib/admin/options.py
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@ -1,6 +1,7 @@
import copy
import json
import operator
import re
from collections import OrderedDict
from functools import partial, reduce, update_wrapper
from urllib.parse import quote as urlquote
@ -1633,6 +1634,27 @@ class ModelAdmin(BaseModelAdmin):
def change_view(self, request, object_id, form_url='', extra_context=None):
return self.changeform_view(request, object_id, form_url, extra_context)
def _get_edited_object_pks(self, request, prefix):
"""Return POST data values of list_editable primary keys."""
pk_pattern = re.compile('{}-\d+-{}$'.format(prefix, self.model._meta.pk.name))
return [value for key, value in request.POST.items() if pk_pattern.match(key)]
def _get_list_editable_queryset(self, request, prefix):
"""
Based on POST data, return a queryset of the objects that were edited
via list_editable.
"""
object_pks = self._get_edited_object_pks(request, prefix)
queryset = self.get_queryset(request)
validate = queryset.model._meta.pk.to_python
try:
for pk in object_pks:
validate(pk)
except ValidationError:
# Disable the optimization if the POST data was tampered with.
return queryset
return queryset.filter(pk__in=object_pks)
@csrf_protect_m
def changelist_view(self, request, extra_context=None):
"""
@ -1713,7 +1735,8 @@ class ModelAdmin(BaseModelAdmin):
if not self.has_change_permission(request):
raise PermissionDenied
FormSet = self.get_changelist_formset(request)
formset = cl.formset = FormSet(request.POST, request.FILES, queryset=self.get_queryset(request))
modified_objects = self._get_list_editable_queryset(request, FormSet.get_default_prefix())
formset = cl.formset = FormSet(request.POST, request.FILES, queryset=modified_objects)
if formset.is_valid():
changecount = 0
for form in formset.forms:

3
docs/releases/1.11.14.txt
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@ -11,3 +11,6 @@ Bugfixes
* Fixed ``WKBWriter.write()`` and ``write_hex()`` for empty polygons on
GEOS 3.6.1+ (:ticket:`29460`).
* Fixed a regression in Django 1.10 that could result in large memory usage
when making edits using ``ModelAdmin.list_editable`` (:ticket:`28462`).

3
docs/releases/2.0.6.txt
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@ -20,3 +20,6 @@ Bugfixes
* Fixed ``WKBWriter.write()`` and ``write_hex()`` for empty polygons on
GEOS 3.6.1+ (:ticket:`29460`).
* Fixed a regression in Django 1.10 that could result in large memory usage
when making edits using ``ModelAdmin.list_editable`` (:ticket:`28462`).

3
tests/admin_changelist/models.py
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@ -1,3 +1,5 @@
import uuid
from django.db import models
@ -73,6 +75,7 @@ class Invitation(models.Model):
class Swallow(models.Model):
uuid = models.UUIDField(primary_key=True, default=uuid.uuid4)
origin = models.CharField(max_length=255)
load = models.FloatField()
speed = models.FloatField()

85
tests/admin_changelist/tests.py
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@ -8,6 +8,7 @@ from django.contrib.admin.tests import AdminSeleniumTestCase
from django.contrib.admin.views.main import ALL_VAR, SEARCH_VAR
from django.contrib.auth.models import User
from django.contrib.contenttypes.models import ContentType
from django.db import connection
from django.db.models import F
from django.db.models.fields import Field, IntegerField
from django.db.models.functions import Upper
@ -15,6 +16,7 @@ from django.db.models.lookups import Contains, Exact
from django.template import Context, Template, TemplateSyntaxError
from django.test import TestCase, override_settings
from django.test.client import RequestFactory
from django.test.utils import CaptureQueriesContext
from django.urls import reverse
from django.utils import formats
@ -732,9 +734,9 @@ class ChangeListTests(TestCase):
'form-INITIAL_FORMS': '3',
'form-MIN_NUM_FORMS': '0',
'form-MAX_NUM_FORMS': '1000',
'form-0-id': str(d.pk),
'form-1-id': str(c.pk),
'form-2-id': str(a.pk),
'form-0-uuid': str(d.pk),
'form-1-uuid': str(c.pk),
'form-2-uuid': str(a.pk),
'form-0-load': '9.0',
'form-0-speed': '9.0',
'form-1-load': '5.0',
@ -764,6 +766,83 @@ class ChangeListTests(TestCase):
# No new swallows were created.
self.assertEqual(len(Swallow.objects.all()), 4)
def test_get_edited_object_ids(self):
a = Swallow.objects.create(origin='Swallow A', load=4, speed=1)
b = Swallow.objects.create(origin='Swallow B', load=2, speed=2)
c = Swallow.objects.create(origin='Swallow C', load=5, speed=5)
superuser = self._create_superuser('superuser')
self.client.force_login(superuser)
changelist_url = reverse('admin:admin_changelist_swallow_changelist')
m = SwallowAdmin(Swallow, custom_site)
data = {
'form-TOTAL_FORMS': '3',
'form-INITIAL_FORMS': '3',
'form-MIN_NUM_FORMS': '0',
'form-MAX_NUM_FORMS': '1000',
'form-0-uuid': str(a.pk),
'form-1-uuid': str(b.pk),
'form-2-uuid': str(c.pk),
'form-0-load': '9.0',
'form-0-speed': '9.0',
'form-1-load': '5.0',
'form-1-speed': '5.0',
'form-2-load': '5.0',
'form-2-speed': '4.0',
'_save': 'Save',
}
request = self.factory.post(changelist_url, data=data)
pks = m._get_edited_object_pks(request, prefix='form')
self.assertEqual(sorted(pks), sorted([str(a.pk), str(b.pk), str(c.pk)]))
def test_get_list_editable_queryset(self):
a = Swallow.objects.create(origin='Swallow A', load=4, speed=1)
Swallow.objects.create(origin='Swallow B', load=2, speed=2)
data = {
'form-TOTAL_FORMS': '2',
'form-INITIAL_FORMS': '2',
'form-MIN_NUM_FORMS': '0',
'form-MAX_NUM_FORMS': '1000',
'form-0-uuid': str(a.pk),
'form-0-load': '10',
'_save': 'Save',
}
superuser = self._create_superuser('superuser')
self.client.force_login(superuser)
changelist_url = reverse('admin:admin_changelist_swallow_changelist')
m = SwallowAdmin(Swallow, custom_site)
request = self.factory.post(changelist_url, data=data)
queryset = m._get_list_editable_queryset(request, prefix='form')
self.assertEqual(queryset.count(), 1)
data['form-0-uuid'] = 'INVALD_PRIMARY_KEY'
# The unfiltered queryset is returned if there's invalid data.
request = self.factory.post(changelist_url, data=data)
queryset = m._get_list_editable_queryset(request, prefix='form')
self.assertEqual(queryset.count(), 2)
def test_changelist_view_list_editable_changed_objects_uses_filter(self):
"""list_editable edits use a filtered queryset to limit memory usage."""
a = Swallow.objects.create(origin='Swallow A', load=4, speed=1)
Swallow.objects.create(origin='Swallow B', load=2, speed=2)
data = {
'form-TOTAL_FORMS': '2',
'form-INITIAL_FORMS': '2',
'form-MIN_NUM_FORMS': '0',
'form-MAX_NUM_FORMS': '1000',
'form-0-uuid': str(a.pk),
'form-0-load': '10',
'_save': 'Save',
}
superuser = self._create_superuser('superuser')
self.client.force_login(superuser)
changelist_url = reverse('admin:admin_changelist_swallow_changelist')
with CaptureQueriesContext(connection) as context:
response = self.client.post(changelist_url, data=data)
self.assertEqual(response.status_code, 200)
self.assertIn('WHERE', context.captured_queries[4]['sql'])
self.assertIn('IN', context.captured_queries[4]['sql'])
# Check only the first few characters since the UUID may have dashes.
self.assertIn(str(a.pk)[:8], context.captured_queries[4]['sql'])
def test_deterministic_order_for_unordered_model(self):
"""
The primary key is used in the ordering of the changelist's results to