引发 404 并继续 URL 链

发布于 2024-08-02 17:54:06 字数 601 浏览 4 评论 0原文

我有一个像这样的 URL 模式：

urlpatterns = (
    url(r'^$', list_titles, name='list'),
    url(r'^(?P<tag>[a-z\-0-9]+?)/$', list_titles, name='filtered-list'),
    url(r'^(?P<title>\S+?)/$', show_title, name='title'),
)

filtered-list 和 title 匹配相同的内容。

如果存在与 filtered-list 中的 tag 匹配的可用内容列表，我希望触发 list_titles。但如果没有匹配的 tag，我想将其冒泡回 URL 处理器，以便 show_title 触发。

如果没有匹配的标题，我会在那里提出适当的 404。

我知道我可以从视图内部执行此操作...但是必须将过程硬连接到视图中有点难闻。我希望 URL 顺序决定首先选择什么以及将其交给什么。

原文

I've got a URLs pattern like this:

urlpatterns = (
    url(r'^
The filtered-list and title match the same things.
If there is an available list of things matching the tag in filtered-list, I want list_titles to fire off. But if there isn't a matching tag, I want to bubble that back to the URL processor so show_title fires off.
If there's no matching title, I'll raise a proper 404 there.
I know I can do this from inside the view...but it's a bit smelly having to hard-wire the process into the view. I'd like the URL order to decide what gets chosen first and what it hands off to.
, list_titles, name='list'),
    url(r'^(?P<tag>[a-z\-0-9]+?)/
The filtered-list and title match the same things.
If there is an available list of things matching the tag in filtered-list, I want list_titles to fire off. But if there isn't a matching tag, I want to bubble that back to the URL processor so show_title fires off.
If there's no matching title, I'll raise a proper 404 there.
I know I can do this from inside the view...but it's a bit smelly having to hard-wire the process into the view. I'd like the URL order to decide what gets chosen first and what it hands off to.
, list_titles, name='filtered-list'),
    url(r'^(?P<title>\S+?)/
The filtered-list and title match the same things.
If there is an available list of things matching the tag in filtered-list, I want list_titles to fire off. But if there isn't a matching tag, I want to bubble that back to the URL processor so show_title fires off.
If there's no matching title, I'll raise a proper 404 there.
I know I can do this from inside the view...but it's a bit smelly having to hard-wire the process into the view. I'd like the URL order to decide what gets chosen first and what it hands off to.
, show_title, name='title'),
)

The filtered-list and title match the same things.

If there is an available list of things matching the tag in filtered-list, I want list_titles to fire off. But if there isn't a matching tag, I want to bubble that back to the URL processor so show_title fires off.

If there's no matching title, I'll raise a proper 404 there.

I know I can do this from inside the view...but it's a bit smelly having to hard-wire the process into the view. I'd like the URL order to decide what gets chosen first and what it hands off to.

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一杆小烟枪 2024-08-09 17:54:06

这当然是视图逻辑；所有 urls.py 用于匹配 URL 模式，而不是执行验证。您可以使用 Http404 处理这个异常。

from django.http import Http404

def detail(request, poll_id):
    try:
        p = Poll.objects.get(pk=poll_id)
    except Poll.DoesNotExist:
        raise Http404
    return render_to_response('polls/detail.html', {'poll': p})

或者，您可以找到 get_object_or_404 或 < code>get_list_or_404 方法，这会稍微缩短它。

承诺的编辑如下。不完全是您正在寻找的东西，但是...

urlpatterns = (
    url(r'^
, list_titles, name='list'),
)

if 1=1: # Your logic here
    urlpatterns += ( url(r'^
, list_titles, name='list'), )

urlpatterns += (
    url(r'^(?P<title>\S+?)/
, show_title, name='title'),
    url(r'^spam/
, spam_bar),
    url(r'^foo/
, foo_bar),
}

This is certainly view logic; all urls.py is for is for matching URL patterns, not performing validation. You can use the Http404 exception to handle this.

from django.http import Http404

def detail(request, poll_id):
    try:
        p = Poll.objects.get(pk=poll_id)
    except Poll.DoesNotExist:
        raise Http404
    return render_to_response('polls/detail.html', {'poll': p})

Alternatively, you may find the get_object_or_404 or get_list_or_404 methods, which shorten it up a bit.

Promised edit follows. Not exactly what you're looking for, but...

urlpatterns = (
    url(r'^
, list_titles, name='list'),
)

if 1=1: # Your logic here
    urlpatterns += ( url(r'^
, list_titles, name='list'), )

urlpatterns += (
    url(r'^(?P<title>\S+?)/
, show_title, name='title'),
    url(r'^spam/
, spam_bar),
    url(r'^foo/
, foo_bar),
}

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