Django:使用基于类的视图在POST方法之后重定向到同一页面

Question

我正在制作一个跟踪电视节目剧集的Django应用程序.这是针对某个Show实例上的页面.当用户点击添加/减去季节时,我希望页面将它们重定向到相同的详细视图,现在我将它显示在显示所有Show实例列表的索引上.

节目-detail.html

<form action="{% url 'show:addseason' show=show %}" method="post">
    {% csrf_token %}

    <button class="btn btn-default" type="submit">+</button>
</form> 

<form action="{% url 'show:subtractseason' show=show %}" method="post">
    {% csrf_token %}

    <button class="btn btn-default" type="submit">-</button>
</form>

views.py

class ShowDetail(DetailView):
    model = Show
    slug_field = "title"
    slug_url_kwarg = "show"
    template_name = 'show/show-detail.html'

class AddSeason(UpdateView):
    model = Show
    slug_field = 'title'
    slug_url_kwarg = 'show'
    fields = []

    def form_valid(self, form):
        instance = form.save(commit=False)
        instance.season += 1
        instance.save()

        return redirect('show:index')

class SubtractSeason(UpdateView):
    model = Show
    slug_field = 'title'
    slug_url_kwarg = 'show'
    fields = []

    def form_valid(self, form):
        instance = form.save(commit=False)
        if (instance.season >= 0):
            instance.season -= 1
        else:
            instance.season = 0

        instance.save()

        return redirect('show:index')

urls.py

url(r'^$', views.IndexView.as_view(), name='index'),

url(r'^about/$', views.AboutView.as_view(), name='about'),

# form to add show
url(r'^add/$', views.ShowCreate.as_view(), name='show-add'),

# edit show
#url(r'^(?P<show>[\w ]+)/edit/$', views.ShowUpdate.as_view(), name='show-update'),

# delete show
url(r'^(?P<show>[\w ]+)/delete/$', views.ShowDelete.as_view(), name='show-delete'),

# signup
url(r'^register/$', views.UserFormView.as_view(), name='register'),

# login
url(r'^login/$', views.LoginView.as_view(), name='login'),

# logout
url(r'^logout/$', views.LogoutView.as_view(), name='logout'),

url(r'^error/$', views.ErrorView.as_view(), name='error'),

url(r'^(?P<show>[\w ]+)/$', views.ShowDetail.as_view(), name='show-detail'),

url(r'^(?P<show>[\w ]+)/addseason/$', views.AddSeason.as_view(), name='addseason'),

url(r'^(?P<show>[\w ]+)/subtractseason/$', views.SubtractSeason.as_view(), name='subtractseason'),

url(r'^(?P<show>[\w ]+)/addepisode/$', views.AddEpisode.as_view(), name='addepisode'),

url(r'^(?P<show>[\w ]+)/subtractepisode/$', views.SubtractEpisode.as_view(), name='subtractepisode'),

我尝试时收到错误

return redirect('show:detail')

这是错误

NoReverseMatch at /Daredevil/addseason/
Reverse for 'detail' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: []

Answer 1

对于CBV:

from django.http import HttpResponseRedirect


return HttpResponseRedirect(self.request.path_info)

对于功能视图:

from django.http import HttpResponseRedirect


return HttpResponseRedirect(request.path_info)

Answer 2

您可以通过重定向到HTTP_REFERER标头来实现这一点，对于回退，只需添加另一个路径。

示例片段：

return redirect(request.META.get('HTTP_REFERER', 'redirect_if_referer_not_found'))

Answer 3

在POST之后重定向到同一页面(例如http GET),我喜欢......

return HttpResponseRedirect("")   # from django.http import HttpResponseRedirect

它还避免了对show:detail路线名称进行硬编码,并且是一种"更明智的意图"(至少对我而言!)

Answer 4

from django.http import HttpResponseRedirect

def someview(request):

   ...
   return HttpResponseRedirect(request.META.get('HTTP_REFERER'))

taken from: /sf/answers/893120161/

Answer 5

我猜你需要提供一个 kwarg 来识别重定向时的显示，尽管我看不到你的代码，但我DetailView假设 kwarg 被称为pk或者可能show来自你在AddSeason和中使用的约定SubtractSeason。尝试：

redirect('show:detail', kwargs={'show': instance.pk})

编辑：详细 url 的名称为'show-detail'，因此作用域视图名称为（如果它与其他 url 一样位于命名空间'show:show-detail'中）。show我仍然认为它需要一个 kwarg，尝试：

redirect('show:show-detail', kwargs={'show': instance.pk})