not able to fetch comment from django templates - django

Question

I am trying to build a social network in django. In this code I am trying to enter comments to a post through the template box in my template. But the comment is not getting fetched in my database. My code is as below:
My forms.py creates a model form for comments
forms.py
class CommentForm(forms.ModelForm):
class Meta:
model = Comment
fields = ('ctext',)
Models has a seperate comment model which has foreign keys from post model and user model.
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
I guess the logic in views is going wrong somewhere as it been shown while debugging
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})
Template
<div>
<h2>{{ post.title }}</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>

Answer 1

i am assuming that you have post and comment entries already trough /admin and that you are able to fetch your posts, according to your question here would be the simpliest way to fetch your post-related comments:
{% 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)
See django docs

Answer 2

change views.py as follows:
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
})

Answer 3

As I can understand you are trying to post a new comment and your way of doing it is totally wrong and that is the reason why you are not able to show comments. This is the right way to do:
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)