CODEWITHSUNDEEP
djangodjango-viewsdjango-templates
Shadow_Knight
Shadow_Knight

Reputation: 41

How to link comment model to Post model django

I want to link a comment model to post when multiple posts are displayed in a page i want to access the post id of the post i am commenting on but i do not know how please tell me how to link the comment model I am a begginner here so i apologize for any errors Please comment if any more of code is needed

template :

{% for Img in imgs %}
    <div class="container">
        <div class="card">
            <div class="card-image waves-effect waves-block waves-light">
                <img class="activator" src="{{ Img.Post_Img.url }}" alt="image">
            </div>
            <div class="card-content">
                <img src="{{ Img.op.userprofile.Profile_pic.url }}" class="profiles" alt="{{ Img.op.userprofile.Nick_Name }}">
                <span class="OP">{{ Img.op.userprofile.Nick_Name }}</span>
                <span class="card-title activator white-text text">{{ Img.Title }}<i class="material-icons right">more_vert</i></span>
                <p><a href="https://www.youtube.com/watch?v=dQw4w9WgXcQ">Vote</a></p>
            </div>
            <div class="card-reveal darken-4 black">
                <span class="card-title white-text text">{{ Img.Title }}<i class="material-icons right">close</i></span>
                <form method="post">
                    {% csrf_token %}
                    {{ comment }}
                    <button class="btn waves-effect waves-light" type="submit" name="action">Submit
                        <i class="material-icons right">send</i>
                    </button>
                </form>
                {% for comment in comments %}
                    {{ comment.op.userprofile.Nick_Name }}{{ comment.comment }}
                {% endfor %}

            </div>
        </div>
    </div>
{% endfor %}

models :

class MemeImg(models.Model):
    Title = models.CharField(max_length=500)
    date_created = models.DateTimeField(auto_now_add=True)
    op = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, default=1)
    Post_Img = CloudinaryField('Post')

    def __str__(self):
        return self.Title


class Comments(models.Model):
    post = models.ForeignKey(MemeImg, on_delete=models.CASCADE)
    op = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, default=1)
    comment = models.TextField()
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.post.Title

views ( does not work throws error not null contraint):

def user_home(request):
    func = data(request)
    url = func[0]
    name = func[1]
    comment = CommentSection(request.POST)
    if request.method == 'POST':
        comment = CommentSection(request.POST)
        if comment.is_valid():
            comment.save(commit=False)
            comment.op = request.user
            comment.save()
    comments = Comments.objects.all()
    imgs = MemeImg.objects.all()
    ctx = {
        'imgs': imgs,
        'url': url,
        'name': name,
        'comment': comment,
        'comments': comments,
    }
    return render(request, 'User_Home.html', ctx)

Upvotes: 0

Views: 201

Answers (1)

Robo
Robo

Reputation: 743

You need to specify null=True and blank=True for the ForeignKey in the Comments model, or you must set a default value in when you makemigrations.

By default, None values aren't allowed for fields, without you explicitly allowing them, because the post property of the Comments model is set to null=False by default.

When you create a comment and something else you've written results in comment.post = None, then Django tries to find a default value. But you haven't specified a default value either, so Django raises the error because it can't find anything to fill in a field that's supposed to have something in it.

So the post field of the Comments model is supposed to look like:

 post = models.ForeignKey(MemeImg, on_delete=models.CASCADE, null=True, blank=True)

Upvotes: 1

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