Django httpresponse在提交表单后不工作

page before submit

我输入一些东西并单击按钮,它不会返回到我想要的页面。错误显示如下: error page

看起来像是风景。py找不到正确的URL,如何修复?

看法py公司 :

def new_topic(request):
    if request.method != "POST":
        form = TopicForm()
    else:
        form = TopicForm(request.POST)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect(reverse('leraning_log:topics'))

    context = {'form':form}     
    return render(request,'learning_logs/new_topic.html',context)

URL。py公司 :

urlpatterns = [

    url(r'^topics/$',views.topics,name='topics'),

    url(r'^topics/(?P<topic_id>\d+)/$',views.topic,name='topic'),

    url(r'^new_topic/$',views.new_topic,name='new_topic'),
]

新建主题。html

{% extends "learning_logs/base.html" %}

{% block content %}
  <p>Add a new topic:</p>

  <form action="{% url 'learning_logs:new_topic' %} method='post'>
    {% csrf_token %}
    {{form.as_p }}
    <button name="submit">add topic</button>
  </form>
{% endblock content %}