Did you try to look at Inclusion Tag ?
http://docs.djangoproject.com/en/dev/howto/custom-template-tags/#inclusion-tags
In template you are not allowed to use some python code... but with an
inclusion tag, you will be able to write this :
{% load related_conferences %}
{% related_conferences scientist %}
And your inclusion tag may be this :
@register.inclusion_tag('path/to/tag/related_conferences.html')
def related_conferences(scientist):
# define here list_of_conferences
return {'list': list_of_conferences}
The inclusion tag have been created for this : move python code into python
file ! Not into template files.
I hope this will help you.
And sorry for my English, I'm french. :)
2009/4/5 codecowboy <[email protected]>
>
> I posted a question earlier today about circular imports (http://
> groups.google.com/group/django-users/t/6119e979131c8c25). I now have
> a follow question to that. I've got the following view logic.
>
> def portal(request):
> scientist_id = 1
> s = get_object_or_404(Scientist, pk=scientist_id)
> return render_to_response('scientists/portal.html',
> {'scientist':s})
>
> Now, Scientists are related (many-to-many) to Conferences through
> ConferenceAttendee. Both of these models are created in a different
> app. I won't paste them in unless someone needs to see them in order
> to answer my question.
>
> I only want to loop through conferences that this scientist is
> presenting. (ConferenceAttendee.presenter=True). I have tried
> following the docs (http://docs.djangoproject.com/en/dev/topics/db/
> queries/#field-lookups-intro<http://docs.djangoproject.com/en/dev/topics/db/%0Aqueries/#field-lookups-intro>),
> but it seems that you can only call the
> filter method in python files like views.py or models.py. I've tried
> replacing the loop code below with "for ...conference._set.filter(...)
> but python gives me errors when I do that. Here is my template logic.
>
> <h2>Your Presentations</h2>
>
> <ul>
> {% for conference in scientist.conference_set.all %}
> <li><a href="/conferences/{{ conference.id }}">
> {{ conference.title }}</a><a href=""><img src="/site_media/images/
> portal_start_button.jpeg" /></a></li>
> {% endfor %}
>
> </ul>
>
> I've been stuck on this one for days now so any help would be greatly
> appreciated. Please do point me to any articles that I may have
> missed that already answer this post.
>
> Thank you,
>
> Guy
> >
>
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