Django/combinig DetailView FormMixin和基于功能的视图

Question

我试图用django制作一个reddit复制。 问题是我无法结合DetailView和基于功能的视图。 我可以创建帖子和对特定帖子的评论，但无法进行嵌套评论。我创建了逻辑，但无法呈现它。 我应该如何渲染嵌套注释？我不能得到的数据机智get_context_data

views.py

class EntryDetail(DetailView, FormMixin): 
    template_name = 'post_detail.html' 
    model = Post 
    form_class = CommentForm 

    def get_success_url(self): 
     return reverse_lazy('post-detail', kwargs={'pk': self.object.pk}) 

    def get_context_data(self, **kwargs): 
     context = super(EntryDetail, self).get_context_data(**kwargs) 
     context['post_object'] = Post.objects.filter(pk=self.kwargs.get('pk')) 
     context['comments'] = Post.objects.get(pk=self.kwargs.get('pk'))\ 
     .comments\ 
     .all() 
     return context 

    def post(self, request, *args, **kwargs): 
     form = self.get_form() 
     p_object = Post.objects.get(pk=self.kwargs.get('pk')) 
     if form.is_valid(): 
      form.save(post=p_object.id) 
      return redirect(reverse_lazy(
          'post-detail', kwargs={'pk': p_object.pk})) 


def add_sub_comment(request, comment_id): 

    comment = Comment.objects.get(pk=comment_id) 
    if request.POST: 
     form = SubCommentForm(request.POST) 
     if form.is_valid(): 
      form.save(comment_object=comment.id) 
      return redirect('index') 

    sub_comments = Comment.objects.filter(object_id=comment.id) 
    ctx = {'sub_comments': sub_comments} 
    return render(request, 'post_detail.html', ctx) 

urls.py

urlpatterns = [ 
    url(r'^$', EntryView.as_view(), name='index'), 
    url(r'^new_post/$', EntryCreate.as_view(), name='new-post'), 
    url(r'^post_detail/(?P<pk>\d+)/$', 
         EntryDetail.as_view(), name='post-detail'), 
    url(r'^sub_comments/(?P<comment_id>\d+)/$', 
         views.add_sub_comment, name='sub-comment'), 
] 

post_detail.html

{% for comment in comments %} 
<div class="comment-per-style"> 
    {{ comment.entry_comment }} 
    {% for subcomment in sub_comments %} 
    <ul> 
     <li>{{ subcomment.entry_comment }}</li> 
    </ul> 
    {% endfor %} 
</div> 
<form action="{% url 'sub-comment' comment.id %}" method="post"> 
    {% csrf_token %} 
    <input id="entry_comment" type="text" name="entry_comment" maxlength="100" required /> 
    <input type="submit" value="OK"> 
</form> 
{% endfor %} 

forms.py

class SubCommentForm(forms.ModelForm): 

    class Meta: 
     model = Comment 
     fields = ('entry_comment',) 
     widgets = { 
      'entry_comment': forms.TextInput(attrs={'class': 'form-input'}), 
     } 

    def save(self, comment_object): 
     comment = Comment() 
     comment.entry_comment = self.cleaned_data['entry_comment'] 
     comment.object_id = comment_object 
     comment.content_type_id = 7 
     comment.save() 

    def __init__(self, *args, **kwargs): 
     super(SubCommentForm, self).__init__(*args, **kwargs) 
     # deleted form label 
     self.fields['entry_comment'].label = "" 

models.py

class Comment(models.Model): 
    entry_comment = models.TextField(max_length=160) 

    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE) 
    object_id = models.PositiveIntegerField() 
    content_object = GenericForeignKey('content_type', 'object_id') 

    def __str__(self): 
     return self.entry_comment 

class Post(models.Model): 
    subject = models.CharField(max_length=20) 
    entry = models.TextField(max_length=160) 
    comments = GenericRelation(Comment) 

    def get_absolute_url(self): 
     return reverse('index') 

    def __str__(self): 
     return self.subject 

Answer 1

你可以试试：

模型中添加方法sub_comments

class Comment(models.Model): 
    entry_comment = models.TextField(max_length=160) 

    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE) 
    object_id = models.PositiveIntegerField() 
    content_object = GenericForeignKey('content_type', 'object_id') 

    def __str__(self): 
     return self.entry_comment 

    def sub_comments(self): 
     ct = ContentType.objects.get_for_model(self) 
     childs = Comment.objects.filter(content_type=ct, object_id=self.pk) 
     return childs 

    def descendants_comments(self): 
     ct = ContentType.objects.get_for_model(self) 
     childs = Comment.objects.filter(content_type=ct, object_id=self.pk) 
     result = [] 
     for child in childs: 
      result.append(child) 
      result.append(child.descendants_comments()) 
     return result 

，并在模板中使用它：

 {{ comment.entry_comment }} 
     {% for subcomment in comment.sub_comments %} 
         <!-- ^^^New^^^--> 
     <ul> 
      <li>{{ subcomment.entry_comment }}</li> 
     </ul> 
     {% endfor %}