[英]Understanding Django's urlconf
I'm trying to understand this line: url(r'^(?P<poll_id>\\d+)/$', views.detail, name='detail'),
from Django's tutorial on how to create views. 我试图理解这一行:
url(r'^(?P<poll_id>\\d+)/$', views.detail, name='detail'),
来自Django关于如何创建视图的教程 。
In particular, I don't understand the following: 特别是,我不明白以下几点:
urls.py urls.py
urlpatterns = patterns('',
# ex: /polls/
url(r'^$', views.index, name='index'),
# ex: /polls/5/
url(r'^(?P<poll_id>\d+)/$', views.detail, name='detail'),
# ex: /polls/5/results/
url(r'^(?P<poll_id>\d+)/results/$', views.results, name='results'),
# ex: /polls/5/vote/
url(r'^(?P<poll_id>\d+)/vote/$', views.vote, name='vote'),
)
(?P<poll_id>...)
creates a named group ; (?P<poll_id>...)
创建一个命名组 ; you can now refer to whatever was matched in that group by name. 您现在可以通过名称引用该组中匹配的任何内容。
The view will be passed a keyword parameter by that name when called. 调用时,视图将通过该名称传递一个关键字参数。
\\d
is a character group, it matches numeric digits ( 0
through to 9
for ASCII data). \\d
是一个字符组,它匹配数字(ASCII数据为0
到9
)。 The +
is a quantifier; +
是量词; only 1 or more digits will match. 只有一个或多个数字匹配。
name='detail'
names the URL pattern so you can refer to it by name later when creating reverse URLs. name='detail'
命名URL模式,以便稍后在创建反向URL时按名称引用它。 See Naming URL patterns in the Django manual. 请参阅Django手册中的命名URL模式 。
All in all, that pattern matches a URL that starts with digits, followed by just a /
slash, causing Django to call the views.detail
view, passing in the matched digits as the poll_id
parameter. 总而言之,该模式匹配以数字开头的URL,后跟一个
/
斜杠,导致Django调用views.detail
视图,将匹配的数字作为poll_id
参数传递。 The name
keyword makes it easy to generate a URL to this view: name
关键字可以轻松生成此视图的URL:
{% url 'name' poll.id %}
would generate a URL to http://yourserver/[digits of poll.id]/
. 会生成一个URL到
http://yourserver/[digits of poll.id]/
。
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