我正在尝试在Django中建立一个社交网络。在这段代码中，我试图通过模板中的模板框输入对帖子的评论。但是注释未在我的数据库中获取。我的代码如下：
我的forms.py为评论创建模型表单
forms.py
class CommentForm(forms.ModelForm):
class Meta:
model = Comment
fields = ('ctext',)
模型具有单独的注释模型，该模型具有来自帖子模型和用户模型的外键。
models.py
class Post(models.Model):
author = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
title = models.CharField(max_length=200)
text = models.TextField()
created_date = models.DateTimeField(default=timezone.now)
published_date = models.DateTimeField(blank=True, null=True)
imgfile = models.ImageField(upload_to='posts/', blank=True, null=True)
def publish(self):
self.published_date=timezone.now()
self.save()
def __str__(self):
return self.title
class Comment(models.Model):
comment_auth = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
title = models.ForeignKey(Post, on_delete=models.CASCADE)
ctext = models.TextField(blank=True, null=True, max_length=200)
created_date = models.DateTimeField(default=timezone.now)
published_date = models.DateTimeField(blank=True, null=True)
def publish(self):
self.published_date=timezone.now()
self.save()
def __str__(self):
return self.ctext
我猜视图中的逻辑在调试时显示的地方出错了
views.py
def post_list(request):
posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
post = get_object_or_404(Post, title=title)
cform = CommentForm()
comments = Comment.objects.all()
if request.method == "POST":
comment_form = CommentForm(data=request.POST)
if comment_form.is_valid():
new_comment = comment_form.save(commit=False)
new_comment.post = post
new_comment.save()
#cform = CommentForm(request.GET)
#data = {}
#Comment.ctext(**data)
#if cform.is_valid():
#comment={}
#comment['ctext'] = request.POST['ctext']
#cform.changed_data['comment_auth'] = request.user
#cform['comment_auth'] = request.user
#cform['comment_auth_id_id'] = request.user
#cform.save()
return render(request, 'users/post_list.html', {'posts': posts, 'comments': comments, 'form': cform})
else:
form = CommentForm()
return render(request, 'users/post_list.html', {'posts': posts, 'comments': comments, 'form': cform})
模板
<div>
<h2><a href="">{{ post.title }}</a></h2>
<p>{{ post.text|linebreaksbr }}</p>
{{image.imgfile.url}}
{% if post.imgfile %}
<img src="{{ post.imgfile.url }}" alt="{{ post.imgfile.url }}">
{% endif %}
<p>By:- {{ post.author }}</p>
<p>published: {{ post.published_date }}</p>
<form method="POST" class="post-form" action="/users/post/list">{% csrf_token %}
{{ form }}
{% for comment in post.comment_set.all %}
<p><b>Comments: </b></p>
<p><b>{{ comment.comment_auth }}: </b>{{ comment.ctext }}</p>
{% endfor %}
<button type="submit" class="save btn btn-default">Comment</button>
</form>
</div>
答案 0 :(得分：1)
我假设您已经具有通过/ admin的帖子和评论条目，并且能够提取您的帖子，根据您的问题，这里将是获取与帖子相关的评论的最简单方法：
{% for post in posts %}
<div>
{{ post.title }}
By - {{ post.author }}
{% for comment in post.comment_set.all %}
<-- is now looking up for all comment entries, where this post is the set foreignkey -->
<p><b>Comments: </b></p>
<p><b>{{ comment.comment_auth }}: </b>{{ comment.ctext }}</p>
{% endfor %}
</div>
{% endfor %}
views.py：
def post_list(request):
posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
context = {'posts': posts}
return render(request, 'users/post_list.html', context)
请参见django docs
答案 1 :(得分：0)
据我了解，您正在尝试发布新评论，而您的操作方式完全错误，这就是您无法显示评论的原因。这是正确的方法：
html：
<p>{{ err_msg }}</p>
{% for post in posts %}
<div>
<!-- Other elements -->
<form method="POST" action="/users/post/list">{% csrf_token %}
{{ form }}
<!-- Sending id of post you are commenting on -->
<input type="hidden" name="post_id" value="{{post.id}}">
<button type="submit">Comment</button>
</form>
<p><b>Comments: </b></p>
{% for comment in post.comment_set.all %}
<p><b>{{ comment.comment_auth }}: </b>{{ comment.ctext }}</p>
{% endfor %}
</div>
{% endfor %}
views.py：
def post_list(request):
posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
# I have removed the comments.objects.all
# as you getting them with post.comment_set.all in your template
form = CommentForm()
data = {'posts': posts, 'form': form}
if request.method == "POST":
# get the id of post you are commenting on
cur_post_id = request.POST.get('post_id')
try:
# check if the post exists in the database.
post = Post.objects.get(id=cur_post_id)
comment_form = CommentForm(data=request.POST)
if comment_form.is_valid():
new_comment = comment_form.save(commit=False)
new_comment.title= post
new_comment.comment_auth = request.user
new_comment.save()
except:
data['err_msg'] = 'Post does not exist!'
return render(request, 'users/post_list.html', data)
答案 2 :(得分：0)
更改 views.py 如下：
def post_list(request):
posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
comment_form = CommentForm()
comments = Comment.objects.all()
if request.method == "POST":
data = {
'ctext': request.POST['ctext'],
'comment_auth_id': request.user.id,
'title_id': request.POST['title_id']
}
comment_form = CommentForm(data=data)
if comment_form.is_valid():
Comment.objects.create(**data)
return render(request, 'users/post_list.html', {
'posts': posts,
'comments': comments,
'form': comment_form
})
else:
return render(request, 'users/post_list.html', {
'posts': posts,
'comments': comments,
'form': comment_form
})