Question

ValueError at /blog/1/comment/new/

The view blog.views.comment_new didn't return an HttpResponse object. It returned None instead.

Request Method: GET

Request URL:    http://localhost:8000/blog/1/comment/new/

为什么请求方法得到？

HTML

＆＃13;

<form action="" method="post">
  {% csrf_token %}
  <table>
    {{ form.as_table }}
  </table>
  <input type="submit" />
</form>

＆＃13;

视图

@login_required
def comment_new(request, post_pk):
    post = get_object_or_404(Post, pk=post_pk)

    if request.method == 'post':
        form = CommentForm(request.POST)
        if form.is_valid():
            comment = form.save(commit=False)
            comment.post = post
            comment.author = request.user
            comment.save()
            return redirect('blog:post_detail', post.pk)
        else:
            form = CommentForm()
        return render(request, 'blog/comment_form.html', {
            'form': form,
        })`

感谢

Answer 1

您只返回post方法的回复。你必须像这样重构你的代码。

def call_comment_form(request): #your function name
    form = CommentForm()
    if request.method == 'post':
        form = CommentForm(request.POST)
        if form.is_valid():
            comment = form.save(commit=False)
            comment.post = post
            comment.author = request.user
            comment.save()
            return redirect('blog:post_detail', post.pk)
        else:
            form = CommentForm(request.post) #this will return the errors in your form
    return render(request, 'blog/comment_form.html', {
    'form': form,
})`

当最初调用url时，它是GET方法，因此你必须先发送一个表单实例（空表单）。

Django没有返回HttpResponse对象错误？

1 个答案: