test0908
/
django
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Added Prefetch import to first use in QuerySet docs.

This commit is contained in:
Perry Roper 2016-12-15 01:54:29 +07:00 committed by Tim Graham
parent adb791fdcb
commit 3be2268992
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
docs/ref/models/querysets.txt
View File

@ -1084,6 +1084,7 @@ the prefetch operation.
In its simplest form ``Prefetch`` is equivalent to the traditional string based In its simplest form ``Prefetch`` is equivalent to the traditional string based
lookups: lookups:
>>> from django.db.models import Prefetch
>>> Restaurant.objects.prefetch_related(Prefetch('pizzas__toppings')) >>> Restaurant.objects.prefetch_related(Prefetch('pizzas__toppings'))
You can provide a custom queryset with the optional ``queryset`` argument. You can provide a custom queryset with the optional ``queryset`` argument.
@ -3138,6 +3139,7 @@ The ``lookup`` argument describes the relations to follow and works the same
as the string based lookups passed to as the string based lookups passed to
:meth:`~django.db.models.query.QuerySet.prefetch_related()`. For example: :meth:`~django.db.models.query.QuerySet.prefetch_related()`. For example:
>>> from django.db.models import Prefetch
>>> Question.objects.prefetch_related(Prefetch('choice_set')).get().choice_set.all() >>> Question.objects.prefetch_related(Prefetch('choice_set')).get().choice_set.all()
<QuerySet [<Choice: Not much>, <Choice: The sky>, <Choice: Just hacking again>]> <QuerySet [<Choice: Not much>, <Choice: The sky>, <Choice: Just hacking again>]>
# This will only execute two queries regardless of the number of Question # This will only execute two queries regardless of the number of Question