找不到localhostweb页面

Posted 2023-03-09

参考技术A 找不到localhostweb页面？答：找不到，不用着急。慢慢来，根据提示分体操作。

找不到错误：找不到页面（404）

【中文标题】找不到错误：找不到页面（404）

【英文标题】：can not find the error: Page not found (404)

【发布时间】：2012-12-29 04:04:50

【问题描述】：

显示以下错误：

  Page not found (404)
  Request Method:   POST
  Request URL:  http://127.0.0.1:8000/events/toggle-attendance/%3E%3Cinput%20type=
  Using the URLconf defined in std.urls, Django tried these URL patterns, in this order:
  ^events/ ^tonight/$ [name='ev_tonight']
  ^events/ ^create/$ [name='ev_create']
  ^events/ ^toggle-attendance/$ [name='ev_toggle_attendance']
  ^admin/
  The current URL, events/toggle-attendance/><input type=, didn't match any of these.

模板：

    <form method="POST" class="toggle_attendance_form" action="% url ev_toggle_attendance %>  
<input type="hidden" name="event_id" value=" event.id " />
        % if attending %
            <input class="attendance unattend" type="submit" value="Unattend" />
        % else %
            <input class="attendance attend" type="submit" value="Attend" />
        % endif %
    </form>

查看：

def toggle_attendance（请求）： 尝试： # 假设 post 参数中的值 event_id = int(request.POST['event_id'])

# couple of possible errors: no event_id in POST parameter or value can not casted as int
except (KeyError, ValueError):
    # raising http404: means it couldnt be found
    raise Http404
# getting the event where id= event_id
event = get_object_or_404(Event, id=event_id)
# 
attendance, created = Attendance.objects.get_or_create(user=request.user,
    event=event)
if created:
    pass
    # messages.add_message(request, messages.INFO, 'You are now attending %s.' % event)
else:
    attendance.delete()
    # messages.add_message(request, messages.INFO, 'You are no longer attending %s.' % event)

# Check to see whether the next variable in the POST parameters
next = request.POST.get('next', '')
if not next:
    next = reverse('ev_tonight')
return HttpResponseRedirect(next)
  toggle_attendance = login_required(toggle_attendance)

网址：

urlpatterns = patterns('',

url(r'^tonight/$', views.tonight, name='ev_tonight'),
url(r'^create/$', views.create, name='ev_create'),
url(r'^toggle-attendance/$', views.toggle_attendance, name='ev_toggle_attendance'),

)

你能帮我找出错误吗？

【问题讨论】：

查看服务器错误日志——它会告诉你请求是什么样的。这应该可以帮助您找到错误。

谢谢，它看起来像这样。 [14/Jan/2013 22:21:27]“POST /events/toggle-attendance/%3E%3Cinput%20type=HTTP/1.1”404 2594

也许如果您将请求更改为“GET”只是为了调试，您将在 URL 中看到请求的确切形成方式

%3E%3C 转换为 >< - 知道它们为什么存在吗？

【参考方案1】：

找到了！您错过了

<form method="POST" 
 class="toggle_attendance_form" action="% url ev_toggle_attendance %>  

应该是这样的

<form method="POST" 
class="toggle_attendance_form" action="% url ev_toggle_attendance %">  

希望能解决！