On May 28, 7:26 am, "Daniele Procida" <dani...@apple-juice.co.uk>
wrote:
> On Thu, May 28, 2009, Masklinn <maskl...@masklinn.net> wrote:
> >> I need to create some templates that will cover a number of cases:
>
> >> display navigation menu: yes or no
> >> display additional info box: yes or no
>
> >> In other words, there are a total of four cases that need to be
> >> provided for.
>
> >> I understand how to use template inheritance so that a derived
> >> template
> >> will contain a block that overrides the default presence of the
> >> navigation menu.
>
> >> I could create a total of four derived templates, one for each case;
> >> that would be OK too.
>
> >> However, the number of derived templates rises exponentially. If I
> >> needed to cover a couple of additional options, say:
>
> >> use low-bandwidth styling: yes or no
> >> display secret information: yes or no
>
> >> then I'd need 16 templates to extend the base.
>
> >> There must be a better way to do this - what is it?
>
> >Template inclusion instead of template inheritance?
>
> You mean, by using a series of tags like:
>
> {% if [condition] %}
> {% include "navigationmenu.html" %}
> {% endif %}
>
> {% if [condition2] %}
> {% include "additionalinfo.html" %}
> {% endif %}
>
> and so on?
>
Yes, that could work.
Also, if you evaluate the conditions in the view, instead of the
template, you can pass in the file to be included as a parameter.
if condition1:
context['extra_includes'] = 'navigationmenu.html'
elif condition2:
context['extra_includes'] = 'additionalinfo.html'
This keeps your template nice and clean:
{% include extra_includes %}
Of course, the tradeoff is that you might view the conditions as
having more context in the template.
Here are the docs for include:
http://docs.djangoproject.com/en/dev/ref/templates/builtins/#include
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