此问题仅发生在生产环境中，在我的本地开发环境中效果很好。
Template error:
In template /home/william/kjmg/templates/base.html, error at line 0
Reverse for 'news_detail' with arguments '('',)' not found. 1 pattern(s) tried: ['news\\-(?P<news_pk>[0-9]+)$']
1 : <!doctype html>
2 : <html lang="en">
3 : {% load staticfiles %}
4 : <head>
5 : <!-- Required meta tags -->
6 : <meta charset="utf-8">
7 : <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
8 : {# 导航栏图标显示 <link rel="icon" href="{% static 'images/logo-w.png' %}">#}
9 : <!-- Bootstrap CSS -->
10 : <link rel="stylesheet" href="{% static 'css/bootstrap.min.css' %}"
Traceback:
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/views/generic/base.py" in view
69. return self.dispatch(request, *args, **kwargs)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/views/generic/base.py" in dispatch
89. return handler(request, *args, **kwargs)
File "/home/william/kjmg/apps/news/views.py" in get
68. 'opinion_news': opinion_news,
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/loader.py" in render_to_string
62. return template.render(context, request)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/backends/django.py" in render
61. return self.template.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render
175. return self._render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/loader_tags.py" in render
155. return compiled_parent._render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/loader_tags.py" in render
67. result = block.nodelist.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/template/defaulttags.py" in render
447. url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/urls/base.py" in reverse
88. return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "/home/william/kjmg/kjmgenv/lib/python3.5/site-packages/django/urls/resolvers.py" in _reverse_with_prefix
632. raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /
Exception Value: Reverse for 'news_detail' with arguments '('',)' not found. 1 pattern(s) tried: ['news\\-(?P<news_pk>[0-9]+)$']
生产环境为digitalocean ubuntu 16.04。开发python版本为3.6，生产python版本为3.5。
这是我的urls.py：
urlpatterns = [
path('', NewsView.as_view(), name='index'),
path('news', include(('news.urls', 'news'), namespace="news")),
]
这是news / urls.py：
from .views import newsDetailView
urlpatterns = [
path('-<int:news_pk>', views.newsDetailView, name="news_detail"),
path('tag_lists-<int:tag_pk>', views.tagNewsList, name="tag_news_list"),
path('category_lists-<int:category_pk>', views.categoryNewsList, name="category_news_list"),
]
这是news / views.py
class NewsView(View):
"""
首页新闻列表
"""
def get(self, request):
all_news = News.objects.all().filter(select_news__isnull=True).exclude(category__name="opinion").order_by('-pk')
return render(request, 'index.html', {
'all_news': news,
})
def newsDetailView(request, news_pk):
news = get_object_or_404(News, id=news_pk)
News.objects.filter(id=news_pk).update(pv=F('pv') + 1)
relative_news = News.objects.filter(tag__id__in=news.tag.all()).exclude(id=news_pk)[:6]
return render(request, "news_detail.html", {
'news': news,
'relative_news': relative_news
})
这是index.html：
{% for news in all_news.object_list %}
<li class="media">
<a href="{% url 'news:news_detail' news.pk %}">
<img class="mr-3 rounded media-list-image" src="{{ MEDIA_URL }}{{ news.image }}"
alt="Generic placeholder image">
</a>
答案 0 :(得分：1)
为了帮助可能遇到相同问题的人们。我需要回答这个问题。
我尝试在本地计算机上运行良好。但是，如果我更改新数据库，则会出现相同的问题。
所以我发现，这个问题是由空数据库引起的！只需在您的数据库中输入内容即可！