Scope of variables in template blocks
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Alex Rades
Dec 12, 2009, 3:25:05 PM12/12/09
to django-users
Hi,
I have a master template which defines two blocks:
{% block account %}{% endblock %}
{% block content %}{% endblock %}
I have a templatetag which tells me the time of the last image upload
(it's a photo sharing site).
This templatetag hits the database, and I don't want to call it
multiple times in the same page.
The problem is that if I do:
{% get_last_upload as last_upload %}
I cannot access the variable 'last_upload' from the two blocks. I have
to call the the templatetag twice, one in each block.
Is there a way to share variables between blocks?
Thank you
I have a master template which defines two blocks:
{% block account %}{% endblock %}
{% block content %}{% endblock %}
I have a templatetag which tells me the time of the last image upload
(it's a photo sharing site).
This templatetag hits the database, and I don't want to call it
multiple times in the same page.
The problem is that if I do:
{% get_last_upload as last_upload %}
I cannot access the variable 'last_upload' from the two blocks. I have
to call the the templatetag twice, one in each block.
Is there a way to share variables between blocks?
Thank you
pjrh...@gmail.com
Dec 12, 2009, 6:14:22 PM12/12/09
to Django users
In your template tag you can add the variable to the global context
like this:
context.dicts[-1]['last_upload'] = whatever
Pete
like this:
context.dicts[-1]['last_upload'] = whatever
Pete
bruno desthuilliers
Dec 14, 2009, 5:08:31 AM12/14/09
to Django users
On 12 déc, 21:25, Alex Rades <alera...@gmail.com> wrote:
> Hi,
>
> I have a master template which defines two blocks:
>
> {% block account %}{% endblock %}
> {% block content %}{% endblock %}
>
> I have a templatetag which tells me the time of the last image upload
> (it's a photo sharing site).
> This templatetag hits the database, and I don't want to call it
> multiple times in the same page.
>
> The problem is that if I do:
>
> {% get_last_upload as last_upload %}
>
> I cannot access the variable 'last_upload' from the two blocks.
When extending a template, anything outside blocks in the extending
> Hi,
>
> I have a master template which defines two blocks:
>
> {% block account %}{% endblock %}
> {% block content %}{% endblock %}
>
> I have a templatetag which tells me the time of the last image upload
> (it's a photo sharing site).
> This templatetag hits the database, and I don't want to call it
> multiple times in the same page.
>
> The problem is that if I do:
>
> {% get_last_upload as last_upload %}
>
> I cannot access the variable 'last_upload' from the two blocks.
template is ignored (except for {% load ... %} tags).
> I have
> to call the the templatetag twice, one in each block.
>
> Is there a way to share variables between blocks?
pjrharley, or within your views, or - might be the better solution in
your case - using a context processor.
My 2 cents.
PS : I still think allowing "context updating" nodes outside blocks in
extending templates might be a good thing . FWIW I had a working
(albeit very Q&D) implementation, but got too negative feedbacks on
the idea on django-dev to bother working on a cleaner implementation
and submiting a patch.
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