python - 提交表单后，Django httpresponse 不起作用

Question

我想提交表单并返回主题页面，但不起作用。这是提交前的页面。 page before submit

我输入一些内容并点击按钮，它没有返回到我想要的页面。错误显示如下: error page

views.py 似乎找不到正确的 URL，我该如何修复它？

view.py:

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)

urls.py:

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'),
]

new_topic.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 %}

Answer 1

问题出在你的表单上，只需删除该操作即可:

 <form method='post'>#instead of
 <form action="{% url 'learning_logs:new_topic' %}" method='post'>

如果您省略自动返回同一页面的操作，您认为更好的做法是:

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

    else:
        form = TopicForm()

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