Re: Django Templates: Using the "with" statement and "block.super" together

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I use it too.

Maybe it would be nice to document it somewhere.


Cheers,
Tom


Dne Tue, 24 Sep 2013 10:59:27 -0700 (PDT)
Warren Smith <warren@wandrsmith.net> napsal(a):

> On occasion, I've used the following technique in my django templates:
>
> # parent.html
>
> {% block someblock %}
> …stuff…
> {% if cool_optional_feature_is_enabled %}
> …optional stuff...
> {% endif %}
> …stuff...
> {% endblock %}
>
>
> # child.html
> {% extends "parent.html" %}
>
> {% block someblock %}
> {% with True as cool_optional_feature_is_enabled %}
> {{ block.super }}
> {% endwith %}
> {% endblock %}
>
>
> The cool thing is that this technique allows a child template to
> essentially enable a feature in the parent template. The same technique can
> also be used to disable a feature in the parent template, or really
> anything that can be driven from a context variable, since, as I understand
> it, that is what the with statement is doing: temporarily injecting a
> variable into the context within which the expressions in a chunk of
> template code are evaluated against.
>
> I was showing this to a colleague today and, though he thought it was neat,
> he had never seen it before and was concerned that it was not a mainstream
> use of the django template language. I did some cursory google searches and
> couldn't find any overt references to this ability either.
>
> My concern is that I may be relying on some undocumented side-effect of the
> way that blocks or the with statement are implemented and that, at some
> point in the future, this will be changed and all of my templates that use
> this will break.
>
>