[英]ValueError when creating Django comment form
我在使用 django 創建評論表單時遇到問題。 在我寫完 view.py、models.py 和 html 之后,我得到了一個ValueError
,它說:
Cannot assign "<class 'blog.models.post'>": "Comment.post" must be a "post" instance".
下面是我的代碼。
HTML
{% block content %}
<h1>Add New Comment:</h1>
<form method='POST' action=''>
{% csrf_token %}
{{ form.as_p }}
<button type='submit'>Submit</button>
</form>
{% endblock %}
視圖.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
您從數據庫中獲取的帖子是po
:
po = get_object_or_404(post, slug=slug)
因此你應該設置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()
請注意,通常在 Django 中,您會將Post
用於您的模型,並為您從數據庫中獲取的實例使用post
。
嘗試一下:
class Comment(models.Model):
post = models.ForeignKey(Post, related_name='comments', on_delete=models.CASCADE)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.