On 8/3/06, skullvulture <[EMAIL PROTECTED]> wrote:
> Is there anyway to declare variables within a template? I'm coming
> from a Zope background where with dtml you have the dtml-let tag and
> with ZPT you have tal:define. Django's templating seems so much cooler
> than Zope's, but I'm missing a declare or define tag.
>
> The idea I want to be able to do is:
>
> {% declare nopastshows=0 %}
> {% for show in object_list %}
> {% if show.is_past_show %}
> <h4>{{ show.show_date.month }}/{{ show.show_date.day }} {{
> show.show_title}} @ <a href="{{ show.location_url }}" target="new">{{
> show.location_name }}</a></h4>
> {% else %}
> {% nopastshows=1 %}
> {% endif %}
> {% endfor %}
>
> {% if nopastshows %}
> <h4>No past show information available</h4>
> {% endif %}
Nope, there's no way to declare variables within templates, and that's
on purpose. (See
http://www.djangoproject.com/documentation/design_philosophies/ for
the rundown.)
There are a couple of ways to solve your particular problem:
* Calculate the nopastshows variable within your view, where the
"business logic" belongs. If you're using a generic view, you won't be
able to do this.
* If you're not using any of the objects with is_past_show == False,
then change your view so that object_list is only the objects with
is_past_show==True. Then you can do this:
{% if object_list %}
(Iterate and display objects.)
{% else %}
No past show information available.
{% endif %}
* You can write a custom template tag, as you noted.
Hope this helps,
Adrian
--
Adrian Holovaty
holovaty.com | djangoproject.com
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