Django Comments Newbie - django

Question

I started learning Django about a month ago and just finished Django for Beginners by William Vincent. The book ends with Ch.15: Comments and shows how the admin can add comments to posts.
Q: Can someone, please, show me or point me in the right direction as to how I can let registered users also add comments to posts? Is there perhaps a 3rd party app for that?
What I have so far:
Models:
class Article(models.Model):
title = models.CharField(max_length=255)
body = models.TextField()
date = models.DateTimeField(auto_now_add=True)
image = models.ImageField(upload_to='images/', null=True, blank=True, height_field=None, width_field=None)
upload = models.FileField(upload_to='files/', null=True, blank=True)
author = models.ForeignKey(
get_user_model(),
on_delete=models.CASCADE,
)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('article_detail', args=[str(self.id)])
class Comment(models.Model):
article = models.ForeignKey(Article, on_delete=models.CASCADE, related_name='comment')
comment = models.CharField(max_length=140)
date = models.DateTimeField(auto_now_add=True)
author = models.ForeignKey(
get_user_model(), on_delete=models.CASCADE,
)
def __str__(self):
return self.comment
def get_absolute_url(self):
return reverse('article_list')
forms.py
class PostForm(forms.ModelForm):
class Meta:
model = Article
fields = ('title', 'body', 'image', 'upload')
class CommentForm(forms.ModelForm):
class Meta:
model = Comment
fields = ('comment', 'author')
Views:
class ArticleListView(LoginRequiredMixin, ListView):
model = Article
template_name = 'article_list.html'
comment_form = CommentForm
login_url = 'login'
class ArticleDetailView(LoginRequiredMixin, DetailView):
model = Article
template_name = 'article_detail.html'
login_url = 'login'
class ArticleUpdateView(LoginRequiredMixin, UpdateView):
model = Article
fields = ('title', 'body', 'image', 'upload')
template_name = 'article_edit.html'
login_url = 'login'
def dispatch(self, request, *args, **kwargs):
obj = self.get_object()
if obj.author != self.request.user:
raise PermissionDenied
return super().dispatch (request, *args, **kwargs)
class ArticleDeleteView(LoginRequiredMixin, DeleteView):
model = Article
template_name = 'article_delete.html'
success_url = reverse_lazy('article_list')
login_url = 'login'
def dispatch(self, request, *args, **kwargs):
obj = self.get_object()
if obj.author != self.request.user:
raise PermissionDenied
return super().dispatch (request, *args, **kwargs)
class ArticleCreateView(LoginRequiredMixin, CreateView):
model = Article
form_class = PostForm
template_name = 'article_new.html'
login_url = 'login'
def form_valid(self, form):
form.instance.author = self.request.user
return super().form_valid(form)
URLs:
urlpatterns = [
path('<int:pk>/edit/', ArticleUpdateView.as_view(), name='article_edit'),
path('<int:pk>/', ArticleDetailView.as_view(), name='article_detail'),
path('<int:pk>/delete/', ArticleDeleteView.as_view(), name='article_delete'),
path('', ArticleListView.as_view(), name='article_list'),
path('new/', ArticleCreateView.as_view(), name='article_new'),]
Thank you for your attention.

Answer 1

Solved. In my views.py I added the following function:
def add_comment(request, pk):
article = get_object_or_404(Article, pk=pk)
if request.method == "POST":
form = CommentForm(request.POST)
if form.is_valid():
comment = form.save(commit=False)
comment.article = article
comment.save()
return redirect('article_detail', pk=article.pk)
else:
form = CommentForm()
return render(request, 'add_comment.html', {'form': form})
Then the following .html file was added to templates:
add_comment.html
{% extends 'base.html' %}
{% block content %}
<h4>Add a Comment</h4>
<form method="post" enctype="multipart/form-data">
{% csrf_token %}
<p>{{ form.as_p }}</p>
<button type="submit" class="btn btn-success">Submit</button>
</form>
{% endblock content %}
P.S.: Initially I was getting an ImportError: cannot import name 'add_comment' from 'articles.views'.
I thought it was a circular import problem and what worked for me was just getting the def add_comment indentation right.