Hi Mayur,
get_object_or_404, returns an object if it exists in the database or it
will raise a 404 exception. So if the object is in the DB, django render
template is done, in your case detail.html is rendered with the context
dictionary.If there's no row peertaining to the query, then Http404 is
raised. So django exception handling kicks in and based on the error code
and your debug parameter a particular template is selected.
regards
Vineeth
On Sun, 14 Apr 2019, 13:16 Mayur Bagul, <mayur.bag...@gmail.com> wrote:
> In below code i didnt understand how colored line of code is working with
> template code ?
>
> why we are passing Question and primary key? instead of dictionary to
> context variable.
>
> plz help me to get out of this confusion.
>
> thanking you.
>
>
> *view.py*
>
>
> from django.shortcuts import get_object_or_404, render
>
> from .models import Question
> # ...
> def detail(request, question_id):
> question = get_object_or_404(Question, pk=question_id)
> return render(request, 'polls/detail.html', {'question': question})
>
>
>
> *detail.html*
>
>
> <h1>{{ question.question_text }}</h1>
> <ul>
> {% for choice in question.choice_set.all %}
> <li>{{ choice.choice_text }}</li>
> {% endfor %}
> </ul>
>
>
>
>
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