在Django中使用path（）找不到404 [英] Getting 404 not found using path() in Django

问题描述

我刚刚签出django，并试图通过将 id 作为URL books / urls的参数传递来列出书籍.py 。但是却找不到404页面错误。在浏览器中键入此URL时，URL没有出问题：

I was just checking out django, and was trying a view to list the books by passing id as an argument to the URL books/urls.py. But getting 404 page not found error. I'm not getting whats wrong in the url when I typed this url in the browser:

 http://192.168.0.106:8000/books/list/21/

bookstore / urls.py

urlpatterns = [
    path('admin/', admin.site.urls),
    path('books/', include("books.urls"))
] 

settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'books'
   ]
...
...
...
ROOT_URLCONF = 'bookstore.urls'

books / urls.py

urlpatterns = [
     path('home/', create),
     path('list/(?P<id>\d+)', list_view),
]

书/视图。 py

def create(request):
    form = CreateForm(request.POST or None, request.FILES or None)
    if form.is_valid():
        instance = form.save(commit=False)
        instance.save()
        messages.success(request, "Book Created")
        return redirect('/books/list', kwargs={"id":instance.id})
    return render(request, "home.html", {"form":form})


def list_view(request, id=None):
    books = Book.objects.filter(id=id)
    return render(request, "list.html", {"books": books})

项目结构：

├── books
│   ├── admin.py
│   ├── forms.py
│   ├── __init__.py
│   ├── models.py
│   ├── urls.py
│   └── views.py
├── bookstore
│   ├── __init__.py
│   ├── settings.py
│   ├── urls.py

这是屏幕截图-

编辑-如注释中所述-在 books.urls / c $ c>但没有运气:(

EDIT - As addressed in the comments - Tried by appending / in the url expression of thebooks.urls but no luck :(

推荐答案

Django 2.0中新的路径错误。您不应该使用 \d + 这样的正则表达式。尝试将其更改为：

You are using the new path from Django 2.0 incorrectly. You shouldn't use a regex like \d+. Try changing it to:

 path('list/<int:id>/', list_view, name='list_view'),

名称是必需的想要反转URL。

The name is required if you want to reverse the URL.

如果您想使用正则表达式，请使用 re_path （或<$ c如果您想与旧版Django兼容，$ c> url（）仍然可以使用。有关更多信息，请参见 URL分派器文档。

If you want to stick with regexes, then use re_path (or url() still works if you want to be compatible with older versions of Django). See the URL dispatcher docs for more info.

还要注意尾部的斜杠-否则您的路径匹配 http://192.168.0.106:8000/books/list/21 ，但不是 http://192.168.0.106:8000/books/list/21/ 。

Note the trailing slash as well - otherwise your path matches http://192.168.0.106:8000/books/list/21 but not http://192.168.0.106:8000/books/list/21/.

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