form object has no attribute 'has_header'

Question

I'm new to django. I have news app with view, which renders a page for each news:

def news_page(request, news_id):
    news = News.objects.get(pk=news_id)
    tags = news.tags.all()
    category = news.category
    comments = news.comment_set.all()
    form = add_comment(request, news.id)
    return render(request, 'news/news_page.html', {'form': form, 'news': news, 'tags': tags, 'category': category, 'user': request.user, 'comments': comments})

And I've created comment app: models.py:

class Comment(models.Model):
    author = models.ForeignKey(User)
    comment_body = models.CharField(max_length=500)
    news = models.ForeignKey(News)
        pub_date = models.DateTineField(default = datetime.datetime.now())

forms.py:

class AddCommentForm(ModelForm):
    comment_body = forms.CharField(widget=forms.Textarea)

    class Meta():
        model = Comment
        exclude = ('author', 'news','pub_date',)

I'l try realize comments.view function add_comment which news_page view (above) use:

def add_comment(request, news_id):
    news = News.objects.get(pk=news_id)
    if request.method == 'POST':
        form = AddCommentForm(request.POST)
        if form.is_valid:
            comment = form.save(commit=False)
            comment.author = request.user
            comment.news = news
            comment.save()
    else:
        form = AddCommentForm()
    return form

But I've got error 'AddCommentForm' object has no attribute 'has_header' . I think that's happen because add_comment view don't have HttpResponse. How should I rewrite code so that the idea become ​​working. Error traceback

Internal Server Error: /news/15/comment/
Traceback (most recent call last):
  File "C:\Python27\myproject\djcode\first_venv\venv\lib\site-packages\django\core\handlers\base.py"
, line 187, in get_response
    response = middleware_method(request, response)
  File "C:\Python27\myproject\djcode\first_venv\venv\lib\site-packages\django\contrib\sessions\middl
eware.py", line 26, in process_response
    patch_vary_headers(response, ('Cookie',))
  File "C:\Python27\myproject\djcode\first_venv\venv\lib\site-packages\django\utils\cache.py", line
142, in patch_vary_headers
    if response.has_header('Vary'):
AttributeError: 'AddCommentForm' object has no attribute 'has_header'

Thank's!

Solution

From a view you need to return a response object , but you are returning the form object. Hence the error.

You can use render instead

Change

return form

to

return render(request, template_name, {'form': form})