On Saturday, November 9, 2013 9:28:01 AM UTC-8, Timothy W. Cook wrote:
>
> SOLVED (sort of).
>
> On Sat, Nov 9, 2013 at 2:56 PM, donarb <don...@nwlink.com <javascript:>>
> wrote:
>
> > If the user is a manager, you should be able to just test for membership
> in
> > the list:
> >
> > {% if user in mgr_list %}
>
> This made perfect sense after I realized that I was looking at a list
> of objects and not just the email string returned from the model. But,
> it didn't work.
>
> > Another option would be to have a property such as "is_manager' and test
> for
> > that in the template.
> >
>
> I thought about this but I also need to see if the manager status has
> expired. So I solved it in this way, though it may not be the most
> efficient.
>
> The view now creates an actual list of email addresses of users with
> active manager status.
>
> class IndexView(TemplateView):
>
> template_name = 'index.html'
>
> def get_context_data(self, **kwargs):
> context = super(IndexView, self).get_context_data(**kwargs)
> mlist = []
> for x in Manager.objects.all():
> if x.expires >= now():
> print(x.expires)
> mlist.append(x.user.email)
> context['mgr_list'] = mlist
> return context
>
>
> Is there a better way? Will this be particularly slow if I have 1,000
> managers?
>
> Thanks,
> Tim
>
The better way is to use the database to find the values, rather than doing
it in Python. Off the top of my head, I'd do something like this:
def get_context_data(self, **kwargs):
context = super(IndexView, self).get_context_data(**kwargs)
# Get all active managers from the database
q = Manager.objects.filter(expires__gte=now())
# Create a list of all of their email addresses, the values() and
values_list() methods
# can pull out just the fields you want - 'flat' creates a list rather
than a dict or tuple
mlist = q.values_list('user__email', flat=True)
context['mgr_list'] = mlist
return context
As I said, I haven't tested this and I may be buggy, but you should be able
to get the idea.
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