python - 评论未添加到数据库中

Question

我正在使用 Django 开发一个电影网站，我正在尝试添加用户评论。只有注册用户才可以发表评论。到目前为止，我有以下几点:
模型.py:

class Comment(models.Model):
    movie = models.ForeignKey(Movie, related_name = "comments", on_delete=models.CASCADE)
    user = models.ForeignKey(User, on_delete = models.CASCADE)
    content = models.TextField()
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return '%s - %s' % (self.movie.title, self.name)

表格.py

class CommentForm(forms.ModelForm):
    content = forms.CharField(label ="", widget = forms.Textarea(
    attrs ={
        'class':'form-control',
        'placeholder':'Comment here!',
        'rows':5,
        'cols':50
    }))
    class Meta:
        model = Comment
        fields =['content']

View .py

class MovieDetailsView(generic.DetailView):
      model = Movie
      template_name = "details.html"
    
      def comment(request, id):
        movie= Movie.objects.get(id)
        if request.method == 'POST':
          cf = CommentForm(request.POST or None)
          if cf.is_valid():
            content = request.POST.get('content')
            comment = Comment.objects.create(movie = movie, user = request.user, content = content)
            comment.save()
            return redirect(movie.get_absolute_url())
          else:
            cf = CommentForm()
              
      context ={
        'comment_form':cf,
        }
      return render(request, 'details.html', context)

详情.html

<form method="POST" action="#" class="form">
    {% csrf_token %}
    {{comment_form.as_p}}
    <button type="submit" class="btn btn-primary  btn-lg">Submit</button>
    <textarea id="text" name="text" class="form__textarea" placeholder="Add comment"></textarea>
    <button type="button" class="form__btn">Send</button>
</form>

MovieDetailsView 显示电影的详细信息页面并有一个评论部分。但是，当我提交评论时，它只显示一个白页和此链接: http://127.0.0.1:8000/details/1# .该评论未保存在数据库中，我似乎无法找到问题所在。我也在关注 this 中的例子关联。
提前致谢!

Answer 1

您可以组合 FormMixin与 DetailView - Using FormMixin with DetailView .

from django.urls import reverse
from django.views.generic.detail import DetailView
from django.views.generic.edit import FormMixin
from django.http import HttpResponseForbidden


class MovieDetailsView(FormMixin, DetailView):
    model = Movie
    template_name = "details.html"
    form_class = CommentForm

    def get_success_url(self):
        return reverse('movie_detail', kwargs={'pk': self.object.pk})
        # or
        # return self.object.get_absolute_url()

    def post(self, request, *args, **kwargs):
        if not request.user.is_authenticated:
            return HttpResponseForbidden()
        self.object = self.get_object()
        form = self.get_form()
        if form.is_valid():
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

    def form_valid(self, form):
        form.instance.user = self.request.user
        form.instance.movie = self.object
        form.save()
        return super().form_valid(form)

在 post()方法，我们首先检查用户是否登录:

if not request.user.is_authenticated:
    return HttpResponseForbidden()

在模板中:

<form method="POST" class="form">
    {% csrf_token %}
    {{ form.as_p }}
    <button type="submit" class="btn btn-primary  btn-lg">Submit</button>
</form>

您可以删除 action属性，表单将被提交到同一页面。