mirrors/django
1
0
Fork 0
mirror of https://github.com/django/django.git synced 2025-10-24 06:06:09 +00:00
Code Issues 32 Releases Wiki Activity

Fixed #16895 -- Warned about cost of QuerySet ordering

Browse Source 
Thanks outofculture at gmail.com for the suggestion.
This commit is contained in:
e0ne
2013-09-08 22:57:36 +03:00
committed by Tim Graham
parent 1185370c2c
commit cbf08c6b0c
3 changed files with 23 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
docs/ref/models/options.txt
View File

@@ -221,6 +221,12 @@ Django quotes column and table names behind the scenes.
ordering = ['-pub_date', 'author']
.. warning::
Ordering is not a free operation. Each field you add to the ordering
incurs a cost to your database. Each foreign key you add will
impliclty include all of its default orderings as well.
``permissions``
---------------

6
docs/ref/models/querysets.txt
View File

@@ -334,6 +334,12 @@ You can tell if a query is ordered or not by checking the
:attr:`.QuerySet.ordered` attribute, which will be ``True`` if the
``QuerySet`` has been ordered in any way.
.. warning::
Ordering is not a free operation. Each field you add to the ordering
incurs a cost to your database. Each foreign key you add will
impliclty include all of its default orderings as well.
reverse
~~~~~~~