Fixed #13196 -- Formatting in admin changelists.

Handled values returned by functions more like field values.
In particular, localized dates, times and datetimes properly,
and converted datetimes to the current timezone.

django/contrib/admin/templatetags/admin_list.py

 import datetime
 
-from django.contrib.admin.util import lookup_field, display_for_field, label_for_field
+from django.contrib.admin.util import (lookup_field, display_for_field,
+    display_for_value, label_for_field)
 from django.contrib.admin.views.main import (ALL_VAR, EMPTY_CHANGELIST_VALUE,
     ORDER_VAR, PAGE_VAR, SEARCH_VAR)
 from django.contrib.admin.templatetags.admin_static import static
@@ -184,15 +185,15 @@ def items_for_result(cl, result, form):
                 boolean = getattr(attr, 'boolean', False)
                 if boolean:
                     allow_tags = True
-                    result_repr = _boolean_icon(value)
-                else:
-                    result_repr = smart_unicode(value)
+                result_repr = display_for_value(value, boolean)
                 # Strip HTML tags in the resulting text, except if the
                 # function has an "allow_tags" attribute set to True.
                 if not allow_tags:
                     result_repr = escape(result_repr)
                 else:
                     result_repr = mark_safe(result_repr)
+                if isinstance(value, (datetime.date, datetime.time)):
+                    row_class = ' class="nowrap"'
             else:
                 if isinstance(f.rel, models.ManyToOneRel):
                     field_val = getattr(result, f.name)
@@ -202,9 +203,7 @@ def items_for_result(cl, result, form):
                         result_repr = escape(field_val)
                 else:
                     result_repr = display_for_field(value, f)
-                if isinstance(f, models.DateField)\
-                or isinstance(f, models.TimeField)\
-                or isinstance(f, models.ForeignKey):
+                if isinstance(f, (models.DateField, models.TimeField, models.ForeignKey)):
                     row_class = ' class="nowrap"'
         if force_unicode(result_repr) == '':
             result_repr = mark_safe(' ')

django/contrib/admin/util.py

+import datetime
+import decimal
+
 from django.db import models
 from django.db.models.sql.constants import LOOKUP_SEP
 from django.db.models.deletion import Collector
@@ -323,7 +326,7 @@ def display_for_field(value, field):
         return EMPTY_CHANGELIST_VALUE
     elif isinstance(field, models.DateTimeField):
         return formats.localize(timezone.localtime(value))
-    elif isinstance(field, models.DateField) or isinstance(field, models.TimeField):
+    elif isinstance(field, (models.DateField, models.TimeField)):
         return formats.localize(value)
     elif isinstance(field, models.DecimalField):
         return formats.number_format(value, field.decimal_places)
@@ -333,6 +336,24 @@ def display_for_field(value, field):
         return smart_unicode(value)
 
 
+def display_for_value(value, boolean=False):
+    from django.contrib.admin.templatetags.admin_list import _boolean_icon
+    from django.contrib.admin.views.main import EMPTY_CHANGELIST_VALUE
+
+    if boolean:
+        return _boolean_icon(value)
+    elif value is None:
+        return EMPTY_CHANGELIST_VALUE
+    elif isinstance(value, datetime.datetime):
+        return formats.localize(timezone.localtime(value))
+    elif isinstance(value, (datetime.date, datetime.time)):
+        return formats.localize(value)
+    elif isinstance(value, (decimal.Decimal, float, int, long)):
+        return formats.number_format(value)
+    else:
+        return smart_unicode(value)
+
+
 class NotRelationField(Exception):
     pass
 

tests/regressiontests/admin_changelist/admin.py

@@ -3,8 +3,8 @@ from __future__ import absolute_import
 from django.contrib import admin
 from django.core.paginator import Paginator
 
-from .models import (Child, Parent, Genre, Band, Musician, Group, Quartet,
-    Membership, ChordsMusician, ChordsBand, Invitation, Swallow)
+from .models import (Event, Child, Parent, Genre, Band, Musician, Group,
+    Quartet, Membership, ChordsMusician, ChordsBand, Invitation, Swallow)
 
 
 site = admin.AdminSite(name="admin")
@@ -15,6 +15,15 @@ class CustomPaginator(Paginator):
             allow_empty_first_page=allow_empty_first_page)
 
 
+class EventAdmin(admin.ModelAdmin):
+    list_display = ['event_date_func']
+
+    def event_date_func(self, event):
+        return event.date
+
+site.register(Event, EventAdmin)
+
+
 class ParentAdmin(admin.ModelAdmin):
     list_filter = ['child__name']
     search_fields = ['child__name']

tests/regressiontests/admin_changelist/models.py

 from django.db import models
 
+class Event(models.Model):
+    date = models.DateField()
 
 class Parent(models.Model):
     name = models.CharField(max_length=128)

tests/regressiontests/admin_changelist/tests.py

 from __future__ import absolute_import
 
+import datetime
+
 from django.contrib import admin
 from django.contrib.admin.options import IncorrectLookupParameters
 from django.contrib.admin.views.main import ChangeList, SEARCH_VAR, ALL_VAR
@@ -7,14 +9,15 @@ from django.contrib.auth.models import User
 from django.template import Context, Template
 from django.test import TestCase
 from django.test.client import RequestFactory
+from django.utils import formats
 
 from .admin import (ChildAdmin, QuartetAdmin, BandAdmin, ChordsBandAdmin,
     GroupAdmin, ParentAdmin, DynamicListDisplayChildAdmin,
     DynamicListDisplayLinksChildAdmin, CustomPaginationAdmin,
     FilteredChildAdmin, CustomPaginator, site as custom_site,
     SwallowAdmin)
-from .models import (Child, Parent, Genre, Band, Musician, Group, Quartet,
-    Membership, ChordsMusician, ChordsBand, Invitation, Swallow,
+from .models import (Event, Child, Parent, Genre, Band, Musician, Group,
+    Quartet, Membership, ChordsMusician, ChordsBand, Invitation, Swallow,
     UnorderedObject, OrderedObject)
 
 
@@ -325,6 +328,19 @@ class ChangeListTests(TestCase):
         self.assertEqual(cl.paginator.count, 30)
         self.assertEqual(cl.paginator.page_range, [1, 2, 3])
 
+    def test_computed_list_display_localization(self):
+        """
+        Regression test for #13196: output of functions should be  localized
+        in the changelist.
+        """
+        User.objects.create_superuser(
+            username='super', email='super@localhost', password='secret')
+        self.client.login(username='super', password='secret')
+        event = Event.objects.create(date=datetime.date.today())
+        response = self.client.get('/admin/admin_changelist/event/')
+        self.assertContains(response, formats.localize(event.date))
+        self.assertNotContains(response, unicode(event.date))
+
     def test_dynamic_list_display(self):
         """
         Regression tests for #14206: dynamic list_display support.
@@ -519,4 +535,4 @@ class ChangeListTests(TestCase):
         OrderedObjectAdmin.ordering = ['-id', 'bool']
         check_results_order()
         OrderedObjectAdmin.ordering = ['id', 'bool']
-        check_results_order(ascending=True)
+        check_results_order(ascending=True)
\ No newline at end of file