On Thu, Feb 5, 2009 at 7:30 AM, Glen Jarvis <g...@glenjarvis.com> wrote:
>
> Notice that I can reference grants.2.63 through direct reference, but
> when trying to use the variables alpha=2, and beta=63, this lookup
> fails.
Yes - it will.
> I'm beating my head up against the wall with this. Could anyone send
> me some guidance?
The short version is "You can't do that" - at least, not in the way you expect.
Django's template language specifically tries to avoid being a
programming language, and one of the things that has been
(deliberately) left out along the way is array subscripting by
variable. As you have discovered, this means you can subscript an
array or dictionary by a constant, but not by a variable.
If you want to extract element [X][Y] of some data structure, you need
to write a template tag that will extract that element. The eventual
syntax you will be using is something like:
{% grant grants alpha beta %}
That is, a template tag called "grant", operating on a data structure
in the context called "grants", using the variables "alpha" and "beta"
for lookup. For full details on writing your own template tag, see:
http://docs.djangoproject.com/en/dev/howto/custom-template-tags/#writing-custom-template-tags
It may also be worth looking around djangosnippets.org - as you might
expect, this is a fairly common question, so its entirely possible
that there is a worked solution already there.
Yours,
Russ Magee %-)
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
