Никита Котов

from django.contrib.auth.models import User

class Comments(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name='Пользователь')
    text_comments = models.TextField('Текст комментария', max_length=200)
    post = models.ForeignKey(Post, verbose_name='Публикация', on_delete=models.CASCADE)

    def __str__(self):
        return f'{self.user.username} / {self.post}'

class CommentsForm(forms.ModelForm):
    class Meta:
        model = Comments
        fields = ('text_comments',)

class AddComments(View):
    def post(self, request, post_id):
        form = CommentsForm(request.POST)
        if form.is_valid():
            comment = form.save(commit=False)
            comment.post_id = post_id
            comment.user = request.user 
            comment.save()
        return redirect('post_detail', post_id=post_id)

<div>
    <h3>Комментарии:</h3>
    <form action="{% url 'add_comments' post.id %}" method="post">
        <h3></h3>
        {% csrf_token %}
        <div>
            <textarea name="text_comments" placeholder="Ваш комментарий..."></textarea>
        </div>
        <div><input type="submit"></div>
    </form>
</div>
<div>
    {% for comment in post.comments_set.all reversed %}
    <div class="view-comment">
        <h4>{{ comment.user.username }}</h4>
        <p><i>{{ comment.text_comments }}</i></p>
    </div>
    {% endfor %}
</div>

path('posts/<int:post_id>/add_comment/', views.AddComments.as_view(), name='add_comments'),

class Home(View):
    def get(self, request):
        post_title = Post.objects.all()
        return render(request, 'forum/home.html', {'post_title': post_title})

class Blog(View):
    def get(self, request):
        post = Post.objects.all()
        print(post)
        return render(request, 'forum/blog.html', {'post': post})

class PostDetail(View):
    def get(self, request, post_id):
        post = Post.objects.get(id=post_id)
        return render(request, 'forum/post_detail.html', {'post': post})

class AddComments(View):
    def post(self, request, post_id):
        form = CommentsForm(request.POST)
        if form.is_valid():
            comment = form.save(commit=False)
            comment.post_id = post_id
            comment.save()
        return redirect('post_detail', post_id=post_id)