Django comment form not submitting data [ERROR: function' object has no attribute 'objects]

Question

我在 post 页面上有一个评论表单，用于提交用户评论。我不断收到此错误：

'function' object has no attribute 'objects'

完整追溯：

Traceback (most recent call last):
File "C:\Users\Steve Njuguna\Desktop\MoringaCore\Django-Instagram-Clone\env\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Steve Njuguna\Desktop\MoringaCore\Django-Instagram-Clone\env\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\Steve Njuguna\Desktop\MoringaCore\Django-Instagram-Clone\env\lib\site-packages\django\contrib\auth\decorators.py", line 21, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "C:\Users\Steve Njuguna\Desktop\MoringaCore\Django-Instagram-Clone\App\views.py", line 208, in AddComment
    comment_obj = Comment.objects.create(opinion = usercomment, author = user.id, post = post.id)

Exception Type: AttributeError at /post/1/comment
Exception Value: 'function' object has no attribute 'objects'

关于 SO 的大多数答案都引用相同的模型和函数名称，但我的情况并非如此。这是我的模型：

class Comment(models.Model):
    opinion = models.CharField(max_length=2200, verbose_name='Comment', null=False)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    post = models.ForeignKey(Post, on_delete=models.CASCADE)

    def __str__(self):
        return self.comment

    class Meta:
        verbose_name_plural = 'Comments'

我的观点

@login_required(login_url='Login')
def AddComment(request, id):
    post = Post.objects.filter(id=id)
    user = User.objects.get(username=request.user)
    if request.method == "POST":
        usercomment = request.POST['comment']
        comment_obj = Comment.objects.create(opinion = usercomment, author = user.id, post = post.id)
        comment_obj.save()
        messages.success(request, '✅ Your Comment Was Created Successfully!')
        return redirect('Home')
    else:
        messages.error(request, "⚠️ Your Comment Wasn't Created!")
        return redirect('Home')

还有我的表格：

<form method="POST" action="{% url 'AddComment' post.id %}">
   {% csrf_token %}
   <div class="d-flex flex-row add-comment-section mt-4 mb-4">
      <img class="img-fluid img-responsive rounded-circle mr-2" src="{{ user.profile.profile_image.url }}" width="38">
      <textarea class="form-control mr-3" rows="1" name="comment" placeholder="Your Comment" required></textarea>
      <button class="btn btn-primary btn-lg" type="submit">Comment</button>
   </div>
</form>

最后是我的 URL:

urlpatterns = [
    path('post/<int:id>/comment', views.AddComment, name="AddComment"),
]

Answer 1

从您的视图中删除 user = User.objects.get(username=request.user)，然后更改：

comment_obj = Comment.objects.create(opinion = usercomment, author = user.id, post = post.id)

对此：

comment_obj = Comment.objects.create(opinion=usercomment, author=request.user, post=post)

因为你不应该在寻找对象的地方传递 id（在 ForeignKey 中我们需要特定的对象，而不是它的 id）。

也改一下：

post = Post.objects.filter(id=id)

为此：

post = Post.objects.get(id=id)

因为您需要特定对象，而不是整个 QuerySet 个对象。

Answer 2

所以你问题的最初问题是在这一行

user = User.objects.get(username=request.user)

我什至不知道它是如何通过 Django Orm 的，但它故意做了 return 一些奇怪的事情

你不需要查询用户对象，因为django自己查询用户对象到request.user。

此外，django.db.models.Model.objects.filter() 总是 returns QuerySet，它不是模型对象，它是一组模型对象。当您通过主键查询并且您确定有一个具有此 id 的实例时使用

 django.db.Model.objects.get(pk=pk)  # Post.objects.get(id=id) in your case

Note:. this method will reproduce ObjectDoesNotExist exception if there is no object found with this primary key, be aware of that.

Django comment form not submitting data [ERROR: function' object has no attribute 'objects]

Django comment form not submitting data [ERROR: function' object has no attribute 'objects]

python

forms

django

function

object