我在使用 django 创建评论表单时遇到问题。在我写完 view.py、models.py 和 html 后,我收到一个 ValueError
,内容如下:
Cannot assign "<class 'blog.models.post'>": "Comment.post" must be a "post" instance".
下面是我的代码。
HTML
{% block content %}
<h1>Add New Comment:</h1>
<form method='POST' action=''>
{% csrf_token %}
{{ form.as_p }}
<button type='submit'>Submit</button>
</form>
{% endblock %}
View .py
def add_comment(request, slug):
po = get_object_or_404(post, slug=slug)
if request.method == 'POST':
form = CommentForm(request.POST or None)
if form.is_valid():
comment = form.save(commit=False)
comment.post = post
comment.save()
return redirect('blog:post', slug=post.slug)
else:
form = CommentForm()
return render(request, 'blog/post/add_comment.html', {'form': form})
模型.py
class Comment(models.Model):
post = models.ForeignKey(post, related_name='comments', on_delete=models.CASCADE)
user = models.CharField(max_length=250)
email = models.EmailField()
body = models.TextField()
created = models.DateTimeField(auto_now_add=True)
approved = models.BooleanField(default=False)
def approved(self):
self.approved = True
self.save()
def __str__(self):
return self.user
最佳答案
您从数据库中获取的帖子是po
:
po = get_object_or_404(post, slug=slug)
因此您应该设置form.post = po
:
def add_comment(request, slug):
po = get_object_or_404(post, slug=slug)
if request.method == 'POST':
form = CommentForm(request.POST or None)
if form.is_valid():
comment = form.save(commit=False)
comment.post = po
comment.save()
请注意,通常在 Django 中,您将使用 Post
作为模型,使用 post
作为从数据库获取的实例。
关于python - 创建 Django 评论表单时出现 ValueError,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55241153/