将Ajax添加到注释部分不起作用

Question

我试图将Ajax添加到我的注释部分，以避免每次添加注释时页面刷新。

因此，我从新comments.html中将注释部分加载到post-details.html，并将实现的Ajax加载到post中，但我的问题是它没有产生任何效果，页面需要刷新以显示新的注释。

我在views.py中对泛型views.py类进行了子类化，并试图根据在views.py中接收到的参数找到一种以JSON格式返回数据的方法。以下是我尝试过的：

class PostDetailView(DetailView):
    model = Post
    template_name = "blog/post_detail.html"  # <app>/<model>_<viewtype>.html

    def get_context_data(self, *args, **kwargs):
        context = super(PostDetailView, self).get_context_data()
        post = get_object_or_404(Post, slug=self.kwargs['slug'])
        comments = Comment.objects.filter(
            post=post).order_by('-id')
        total_likes = post.total_likes()
        liked = False
        if post.likes.filter(id=self.request.user.id).exists():
            liked = True

        if self.request.method == 'POST':
            comment_form = CommentForm(self.request.POST or None)
            if comment_form.is_valid():
                content = self.request.POST.get('content')
                comment_qs = None

                comment = Comment.objects.create(
                    post=post, user=self.request.user, content=content)
                comment.save()
                return HttpResponseRedirect("blog/post_detail.html")
        else:
            comment_form = CommentForm()

        context["comments"] = comments
        context["comment_form"] = comment_form
        context["total_likes"] = total_likes
        context["liked"] = liked

        if self.request.is_ajax():
            html = render_to_string('blog/comments.html', context, request=self.request)
            return JsonResponse({'form': html})
        else:
            return context

但这给了我TypeError的应有之处：

TypeError: context must be a dict rather than JsonResponse.

这是回溯：

Traceback (most recent call last):
  File "C:\Users\User\Desktop\Project\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Users\User\Desktop\Project\venv\lib\site-packages\django\core\handlers\base.py", line 202, in _get_response
    response = response.render()
  File "C:\Users\User\Desktop\Project\venv\lib\site-packages\django\template\response.py", line 105, in render
    self.content = self.rendered_content
  File "C:\Users\User\Desktop\Project\venv\lib\site-packages\django\template\response.py", line 83, in rendered_content
    return template.render(context, self._request)
  File "C:\Users\User\Desktop\Project\venv\lib\site-packages\django\template\backends\django.py", line 59, in render
    context = make_context(context, request, autoescape=self.backend.engine.autoescape)
  File "C:\Users\User\Desktop\Project\venv\lib\site-packages\django\template\context.py", line 268, in make_context
    raise TypeError('context must be a dict rather than %s.' % context.__class__.__name__)

在控制台中，我收到了以下错误：

GET http://127.0.0.1:8000/blog/blog-4/ 500 (Internal Server Error)  jquery.min.js:2 

以下是评论部分：

        <!-- Submit Comment -->
        <div class="container-fluid mt-2">
            <div class="form-group row">
                <form action="{% url 'blog:post-comment' post.slug %}" method="post" class="comment-form" action=".">
                {% csrf_token %}
                {{ comment_form.as_p }}
                <input type="submit" name="post_id" value='Submit' class="btn btn-outline-success">
<!--                <button type="submit" class="btn btn-outline-success">Submit</button>-->
                </form>
            </div>
        </div>
        <!-- Submit Comment -->

        <!-- Show Comment -->
        <button class="cmt_btn btn btn-outline-info mb-0">Show / Hide {{comments.count}} Comment{{comments|pluralize}}</button>
            <div class="comment-box">
            {% for comment in comments %}
                <ul class="mt-3 list-unstyled">
                  <li class="media">
                    <img class="rounded-circle article-img" src="{{ comment.post.author.profile.image.url }}">
                      <div class="media-body">
                      <h5 class="mt-0 mb-1">{{comment.user| capfirst}}<small class="text-muted">- {{ comment.created}}</small> </h5>
                        <hr class="solid mt-0">
                         {% if comment.user == user %}
                          <div>
                            <a class="float-right mr-3" href="{% url 'blog:delete-comment' comment.id%}">Delete </a>
                          </div>
                        {% endif %}
                        {{ comment.content}}
                      </div>
                  </li>
                </ul>
            {% endfor %}
            </div>
        <!-- Show Comment -->

这是剧本

    <script>
        $(document).on('submit', '.comment-form', function(event){
          event.preventDefault();
          console.log($(this).serialize());
          $.ajax({
            type: 'POST',
            url: $(this).attr('action'),
            data: $(this).serialize(),
            dataType: 'json',
            success: function(response) {
              $('.main-comment-section').html(response['form']);
              $('textarea').val('');
            },
            error: function(rs, e) {
              console.log(rs.responseText);
            },
          });
        });
    </script>

我的问题是：

获得此错误的原因是什么，以及如何修复它？

Answer 1

函数get_context_data仅用于为上下文构建数据，而不是处理ajax请求。您需要拆分您的函数，以便为GET数据提供处理。

示例结构

class PostDetailView(DetailView):
    model = Post
    template_name = "blog/post_detail.html"  # <app>/<model>_<viewtype>.html

    def get_context_data(self, *args, **kwargs):
        [...]
        return context

    def get(self, request, *args, **kwargs):
        if self.request.is_ajax():
            context = self.get_context_data(self, *args, **kwargs)
            html = render_to_string('blog/comments.html', context, request=self.request)
            return JsonResponse({'form': html})
        [...]
    
    def post(self, request, *args, **kwargs):
        [...]