Hi,
On Wed, Oct 15, 2008 at 01:46:38PM -0700, bmt wrote:
> my problem is that when this list is empty i want to branch in the
> template, and display some sort of message, instead of the usual 'for'
> loop which would display the returned list. since i can't assign the
> returned list to a variable i have to check the method's return value
> first with an 'if' tag than run the query again for the 'for' loop.
> this doubles the load on the db what i don't like, not to mention that
> the two queries may return different lists.
>
> am i missing something? do i follow a bad pattern? why i can't extend
> the context from inside a template?
Does the {% with %} tag help you here?
Something like:
{% with blah.get_some_results as foo %}
{% if foo %}
...
{% else %}
...
{% endif %}
{% endwith %}
Otherwise, since it's your object, you could always cache the result of
the query in the object.
Cheers,
Chris
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