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Fixed #8408 -- Added ModelAdmin.show_full_result_count to avoid COUNT() query. 

Thanks lidaobing for the suggestion.
This commit is contained in:
Thomas Chaumeny 2014-09-22 18:46:43 +02:00 committed by Tim Graham
parent d1ca70110f
commit 17557d068c
8 changed files with 50 additions and 7 deletions
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1
django/contrib/admin/options.py
View File

@ -110,6 +110,7 @@ class BaseModelAdmin(six.with_metaclass(forms.MediaDefiningClass)):
readonly_fields = ()
ordering = None
view_on_site = True
show_full_result_count = True
# Validation of ModelAdmin definitions
# Old, deprecated style:

4
django/contrib/admin/templates/admin/change_list.html
View File

@ -87,9 +87,9 @@
{% endif %}
{% block result_list %}
{% if action_form and actions_on_top and cl.full_result_count %}{% admin_actions %}{% endif %}
{% if action_form and actions_on_top and cl.show_admin_actions %}{% admin_actions %}{% endif %}
{% result_list cl %}
{% if action_form and actions_on_bottom and cl.full_result_count %}{% admin_actions %}{% endif %}
{% if action_form and actions_on_bottom and cl.show_admin_actions %}{% admin_actions %}{% endif %}
{% endblock %}
{% block pagination %}{% pagination cl %}{% endblock %}
</form>

2
django/contrib/admin/templates/admin/search_form.html
View File

@ -6,7 +6,7 @@
<input type="text" size="40" name="{{ search_var }}" value="{{ cl.query }}" id="searchbar" />
<input type="submit" value="{% trans 'Search' %}" />
{% if show_result_count %}
<span class="small quiet">{% blocktrans count counter=cl.result_count %}{{ counter }} result{% plural %}{{ counter }} results{% endblocktrans %} (<a href="?{% if cl.is_popup %}_popup=1{% endif %}">{% blocktrans with full_result_count=cl.full_result_count %}{{ full_result_count }} total{% endblocktrans %}</a>)</span>
<span class="small quiet">{% blocktrans count counter=cl.result_count %}{{ counter }} result{% plural %}{{ counter }} results{% endblocktrans %} (<a href="?{% if cl.is_popup %}_popup=1{% endif %}">{% if cl.show_full_result_count %}{% blocktrans with full_result_count=cl.full_result_count %}{{ full_result_count }} total{% endblocktrans %}{% else %}{% trans "Show all" %}{% endif %}</a>)</span>
{% endif %}
{% for pair in cl.params.items %}
{% ifnotequal pair.0 search_var %}<input type="hidden" name="{{ pair.0 }}" value="{{ pair.1 }}"/>{% endifnotequal %}

7
django/contrib/admin/views/main.py
View File

@ -177,10 +177,13 @@ class ChangeList(object):
# Perform a slight optimization:
# full_result_count is equal to paginator.count if no filters
# were applied
if self.model_admin.show_full_result_count:
if self.get_filters_params() or self.params.get(SEARCH_VAR):
full_result_count = self.root_queryset.count()
else:
full_result_count = result_count
else:
full_result_count = None
can_show_all = result_count <= self.list_max_show_all
multi_page = result_count > self.list_per_page
@ -194,6 +197,10 @@ class ChangeList(object):
raise IncorrectLookupParameters
self.result_count = result_count
self.show_full_result_count = self.model_admin.show_full_result_count
# Admin actions are shown if there is at least one entry
# or if entries are not counted because show_full_result_count is disabled
self.show_admin_actions = self.show_full_result_count or bool(full_result_count)
self.full_result_count = full_result_count
self.result_list = result_list
self.can_show_all = can_show_all

13
docs/ref/contrib/admin/index.txt
View File

@ -1160,6 +1160,19 @@ subclass::
:meth:`ModelAdmin.get_search_results` to provide additional or alternate
search behavior.
.. attribute:: ModelAdmin.show_full_result_count
.. versionadded:: 1.8
Set ``show_full_result_count`` to control whether the full count of objects
should be displayed on a filtered admin page (e.g. ``99 results (103 total)``).
If this option is set to ``False``, a text like ``99 results (Show all)``
is displayed instead.
The default of ``show_full_result_count=True`` generates a query to perform
a full count on the table which can be expensive if the table contains a
large number of rows.
.. attribute:: ModelAdmin.view_on_site
.. versionadded:: 1.7

4
docs/releases/1.8.txt
View File

@ -72,6 +72,10 @@ Minor features
<django.contrib.admin.AdminSite.site_url>` in order to display a link to the
front-end site.
* You can now specify :attr:`ModelAdmin.show_full_result_count
<django.contrib.admin.ModelAdmin.show_full_result_count>` to control whether
or not the full count of objects should be displayed on a filtered admin page.
:mod:`django.contrib.auth`
^^^^^^^^^^^^^^^^^^^^^^^^^^

1
tests/admin_views/admin.py
View File

@ -327,6 +327,7 @@ class LanguageAdmin(admin.ModelAdmin):
class RecommendationAdmin(admin.ModelAdmin):
show_full_result_count = False
search_fields = ('=titletranslation__text', '=recommender__titletranslation__text',)

17
tests/admin_views/tests.py
View File

@ -2474,11 +2474,28 @@ class AdminSearchTest(TestCase):
"""
Test presence of reset link in search bar ("1 result (_x total_)").
"""
# 1 query for session + 1 for fetching user
# + 1 for filtered result + 1 for filtered count
# + 1 for total count
with self.assertNumQueries(5):
response = self.client.get('/test_admin/admin/admin_views/person/?q=Gui')
self.assertContains(response,
"""<span class="small quiet">1 result (<a href="?">3 total</a>)</span>""",
html=True)
def test_no_total_count(self):
"""
#8408 -- "Show all" should be displayed instead of the total count if
ModelAdmin.show_full_result_count is False.
"""
# 1 query for session + 1 for fetching user
# + 1 for filtered result + 1 for filtered count
with self.assertNumQueries(4):
response = self.client.get('/test_admin/admin/admin_views/recommendation/?q=bar')
self.assertContains(response,
"""<span class="small quiet">1 result (<a href="?">Show all</a>)</span>""",
html=True)
@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',),
ROOT_URLCONF="admin_views.urls")