python - 使用参数 'get_post' 和关键字参数 '()' slug' : '{' }' not found 反转 'sample-post'

Question

我正在使用 Django 1.9。在实现基于类的 View 和 urlpatterns 时，我无法将我的特定链接重定向到相应的帖子。

settings/urls.py:

from django.conf.urls import url, include
from django.contrib import admin
from posts.views import Home


urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^post/', include("posts.urls")),
    url(r'^$', Home.as_view(), name="blog_home"),
]

posts/urls.py

from django.conf.urls import url, include
from .views import Display


urlpatterns = [
    url(r'^(?P<slug>\w+)/$', Display.as_view(), name="get_post"),
]

posts/views.py

class Display(View):
    def get(self, request, slug):
        params = {}
        params['post'] = Post.objects.get(slug=slug)        
        return render(request, "blog/viewpost.html", params)

    def post(self, request):
        pass

我的错误如下:

error is shown in that image

Answer 1

当您使用 url 正则表达式时 r'^(?P<slug>\w+)/$ , \w匹配字母数字字符和下划线。但是，它不会匹配连字符 - .

因此，当您的模板查找带有 slug 的 URL 时等于sample-post ，上面的正则表达式将找不到匹配项。您应该尝试改用它:

urlpatterns = [
    url(r'^(?P<slug>[-\w]+)/$', Display.as_view(), name="get_post"),
]