Hi
Benedict Verheyen wrote:
> When i need such functionality, i assign values to vars of the list items.
> For instance, in your case i would do something like this
> def experiments(request):
> experiment_list = Experiment.objects.all()
> ecount = len(experiment_list) + 1
>
> for e in experiment_list:
> e.proc_count = e.experiment_procedure_set.all().count()
> return render_to_response('lab/experiments.html',
> {'experiment_list': experiment_list,
> 'ecount': ecount,
> })
>
> As you've seen, i reuse the experiment_list to loop over and assign
> values too.
> This is from the top of my head so i hope it works :)
Yes it does work, thanks heaps. I presume though that the render_to_return is
outside
of the previous for loop as below.
for e in experiment_list:
e.proc_count = e.experiment_procedure_set.all().count()
return render_to_response('lab/experiments.html',
{'experiment_list': experiment_list,
'ecount': ecount,
})
Anyhow with the above I now get the correct list of procs for each experiment.
So
what's happening I understand is that I'm creating a new attribute or method of
the
object e called .proc_count by simply assigning e.proc_count a value?
> Mike Lake schreef:
>>Im trying to place into a list of experiments the number of procedures for
>>each experiment.
>>From within the views.py I can save the number of procedures in an experiment
>>into either a list of tuples (e.id, count) or a dictionary {'e.id': count}.
>>But when I come to access them in the templates I can't do something like {{
>>e."e.id".1 }}
>>
>>The template:
>>
>>This works: {{ pcount.1.1 }} is the number of procedures in experiment 1.
>>This works: {{ pcount.2.1 }} is the number of procedures in experiment 2.
>>
>>{% for e in experiment_list %}
>> {{ e.id }}
>> {{ e.name }}
>> {{ e."e.id".1 }} <----- what to use here though ???
>>{% endfor %}
>>
>>In views.py:
>>
>>def experiments(request):
>> experiment_list = Experiment.objects.all()
>> ecount = len(experiment_list) + 1
>>
>> # TODO create a dictionary of the number of procedures in each experiment.
>> pcount = []
>> my_tuple = ()
>> for e in Experiment.objects.all():
>> my_count = e.experiment_procedure_set.all().count()
>> pcount.append( (e.id, my_count) )
>>
>> return render_to_response('lab/experiments.html',
>> {'experiment_list': experiment_list,
>> 'ecount': ecount, # ecount is the number of experiments.
>> 'pcount': pcount, # pcount is the number of procedures in an
>> experiment.
>> })
>>
>>There are references to 'dynamic lookup' of variables in the docs for
>>template authors.
>>But this seems very complex to use custom tags and filters. I know the docs
>>can be a little behind the development version so is there an easy way to do
>>this?
Mike
--
Michael Lake
Computational Research Support Unit
Science Faculty, UTS
Ph: 9514 2238
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