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django - 没有找到 NoReverseMatch URL Django

问题描述

我可能在这里遗漏了一些东西，但是我有一个连接页面，登录用户可以在其中通过单击Chat?每个用户个人资料上的链接与另一个用户聊天。

聊天功能是使用 Django Channels 构建的，并通过 url 模式访问

site/messages/username

其中用户名是other_user正在current_user与之聊天的人。

我目前的chat?链接为

<a class='btn btn-light' href="{% url 'thread' username %}" id="chat">Chat?</a>

但是，这会引发错误 NoReverseMatch Reverse for 'thread' not found. 'thread' is not a valid view function or pattern name.

我尝试遵循文档并将用户名添加为 arg / 将其删除，但我一直遇到同样的错误。

聊天应用程序包含在 settings.py 中，url 包含在 admin.py 中。

连接和聊天是独立的应用程序。

下面是相关代码。感谢您的时间和帮助！

聊天/urls.py

from django.urls import path, re_path
from .views import ThreadView, InboxView

app_name = 'chat'
urlpatterns = [
    path("", InboxView.as_view()),
    re_path(r"^(?P<username>[\w.@+-]+)", ThreadView.as_view(), name='thread'),
]

聊天/views.py

class ThreadView(LoginRequiredMixin, FormMixin, DetailView):
    template_name = 'chat/thread.html'
    form_class = ComposeForm
    success_url = './'

    def get_queryset(self):
        return Thread.objects.by_user(self.request.user)

    def get_object(self):
        other_username  = self.kwargs.get("username")
        obj, created    = Thread.objects.get_or_new(self.request.user, other_username)
        if obj == None:
            raise Http404
        return obj

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['form'] = self.get_form()
        return context

追溯

Internal Server Error: /connect/
Traceback (most recent call last):
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/Users/xx/xx/project/src/project/connect/views.py", line 15, in connect_home_view
    return render(request, 'connect/home.html', context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/shortcuts.py", line 36, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/loader.py", line 62, in render_to_string
    return template.render(context, request)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/backends/django.py", line 61, in render
    return self.template.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 171, in render
    return self._render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 163, in _render
    return self.nodelist.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 937, in render
    bit = node.render_annotated(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 904, in render_annotated
    return self.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/loader_tags.py", line 150, in render
    return compiled_parent._render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 163, in _render
    return self.nodelist.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 937, in render
    bit = node.render_annotated(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 904, in render_annotated
    return self.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 937, in render
    bit = node.render_annotated(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 904, in render_annotated
    return self.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/defaulttags.py", line 209, in render
    nodelist.append(node.render_annotated(context))
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/base.py", line 904, in render_annotated
    return self.render(context)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/template/defaulttags.py", line 442, in render
    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/urls/base.py", line 90, in reverse
    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
  File "/Users/xx/xx/project/lib/python3.7/site-packages/django/urls/resolvers.py", line 622, in _reverse_with_prefix
    raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'thread' with arguments '('',)' not found. 1 pattern(s) tried: ['messages/(?P<username>[\\w.@+-]+)']
[2019/01/27 12:36:43] HTTP GET /connect/ 500 [0.10, 127.0.0.1:50815]

标签： djangodjango-channels

解决方案

你正在使用app_name = 'chat'. 这使您的应用程序级 url 在应用程序命名空间下可用。请参阅文档：https ://docs.djangoproject.com/en/2.1/topics/http/urls/#url-namespaces-and-included-urlconfs

这应该有效：

{% url 'chat:thread' username %}

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