Django : Passing multiple objects to templates but nothing in there

Question

I wanted to pass two objects to templates, so I put theme in the context and try to send them but failed. I tried few times but it seems like user get objects but comment is always empty even though there are some data in db.

This is views.py

@login_required
def detail(request, article_no):
    if not request.user.is_authenticated():
        return redirect_to_login(next, 'blog/login.html')
else:
    user = request.user

    if 'username' in request.session:
        username = request.session['username']
        item = get_object_or_404(Article, pk=article_no)
        item.hit = Article.objects.filter(pk=article_no).update(hit = item.hit+1)
        #comment = Comment.objects.filter(pk=article_no).order_by('comment_no')
        comment = Comment.objects.all()
        context = {
             'item': item,
             'comment': comment,
            }
    return render(request, 'blog/detail.html', context)

this is models.py

from datetime import datetime
from django.db import models
from django.template.defaultfilters import default

class Article(models.Model):
   no = models.AutoField(primary_key=True)
   title = models.CharField(max_length=50)
   content = models.CharField(max_length=300)
   writer = models.CharField(max_length=50)
   is_visible = models.BooleanField(default=True)
   created_date = models.DateTimeField(editable=False, default=datetime.now())
   hit = models.IntegerField(default=1)

class Comment(models.Model):
    article_no = models.IntegerField(default=1)
    comment_no = models.AutoField(primary_key=True)
    comment_writer = models.CharField(max_length=50)
    comment_body = models.CharField(max_length=300)
    comment_date = models.DateTimeField(editable=False, default=datetime.now())

template

         {{ item.title }}
         {{ item.no }}
         {{ item.writer }}
         {{ item.hit }}
         {{ item.created_date }}
         {{ item.content }}
 {% if comments %}

                {% for comment in comments %}

                {{ comment.comment_no }}
                {{ comment.comment_writer }}
                {{ comment.comment_body }}
                {{ comment.comment_date }}

                {% endfor %}

                {% else %}
                <div class="row">no comment.</div>
            {% endif %}

score 3 · Answer 1 · answered Feb 15 '17 at 13:15

3

The variable you're passing from the view with all the comments in is called comment, for some reason. But in the template you try to iterate over comments, which doesn't exist. You should use consistent naming; it would make more sense to use comments.

answered Feb 15 '17 at 13:15

Daniel Roseman

588,541
66
880
895

score 1 · Answer 2 · answered Jun 17 '20 at 05:00

Your code

@login_required
def detail(request, article_no):
if not request.user.is_authenticated():
    return redirect_to_login(next, 'blog/login.html')
else:
user = request.user

if 'username' in request.session:
    username = request.session['username']
    item = get_object_or_404(Article, pk=article_no)
    item.hit = Article.objects.filter(pk=article_no).update(hit = item.hit+1)
    #comment = Comment.objects.filter(pk=article_no).order_by('comment_no')
    comment = Comment.objects.all()
    context = {
         'item': item,
         'comment': comment,
        }
return render(request, 'blog/detail.html', context)

Correction Code -->

@login_required
def detail(request, article_no):
if not request.user.is_authenticated():
    return redirect_to_login(next, 'blog/login.html')
else:
user = request.user

if 'username' in request.session:
    username = request.session['username']
    item = get_object_or_404(Article, pk=article_no)
    item.hit = Article.objects.filter(pk=article_no).update(hit = item.hit+1)
    #comment = Comment.objects.filter(pk=article_no).order_by('comment_no')
    comment = Comment.objects.all()
    return render(request, 'blog/detail.html', {'item':item, 
    'comment':comment})

Details will be found here (pass multiple objects to RequestContext in django)

And in the template you use comments but in your code, there are no comments, rather then it is a comment.

Django : Passing multiple objects to templates but nothing in there

2 Answers2