On Jul 3, 9:17 am, Nikola Pavlović <n...@datasnok.org> wrote:
> Hello people,
>
> I'm writing my first Django application and would like to know what is
> considered more efficient: getting values of models' attributes in views
> or directly in templates?
>
> More precicely, say we have a Person model with name and id attributes,
> and these need to be shown on a page.
>
> Is it better for a view to "prepare" a context like this:
>
> # views.py
> # ...
>
> persons = []
>
> for person in Person.objects.all():
> persons.append({'id': person.id, 'name': person.name})
>
> return render_to_response('some_template.html', persons)
>
> # some_template.html
>
> {% for p in persons %}
> Id: {{ p.id }}; Name: {{ p.name }}
> {% endfor %}
>
> or just pass a QuerySet in a context like this:
> # views.py
> # ...
>
> persons = Person.objects.all()
> return render_to_response('some_template.html', persons)
>
> and then let the template access attribute values directly?
>
> Does it make a difference in terms of performance?
The second method avoids an extra loop and also keeps your code leaner
(less code == lesser chances of bugs). It's also the more commonly
used method. And if you are displaying just a handful of persons per
page, the performance differences should be negligible either way. If
you have a lot of persons in that query set, you will want to use some
kind of pagination anyway.
-RD
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