On Jul 5, 2017 6:55 AM, "elloy" <elenilou...@gmail.com> wrote:
>
> I need your help with a problem I'm trying to solve
> I'm making a questionnaire and I have to count the selected choices that
the user have checked in a certain question with 5 possible answers(choices)
> The model I'm using is:
>
> class Reuse(models.Model):
> REUSE_OPTIONS = (
> ('1', 'first choice'),
> ('2', 'second choice'),
> ('3', 'third choice'),
> ('4', 'fourth choice'),
> ('5', 'none of the above'),
> )
>
> user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True,
blank=True)
> reuse = MultiSelectField(max_length=250, choices= REUSE_OPTIONS,
max_choices=4, null=True)
> m = models.DecimalField(max_digits=5, decimal_places=3, default=0)
> numchoices = models.IntegerField()
I am not an expert in Django, but I will point out some problems. You just
made an assignment to numchoices, then you redefine numchoices in the next
line.
> def numchoices(self): (I tried
this but it didn't work)
Telling us it didn't work is not helpful. You need to be much more
explicit. What led you to say this didn't work?
> self.choices_count = self.choice_set.count()
What are choices_count any choice_set?
> self.save()
>
> I wrote this view:
> def reuse (request):
> if request.method == "POST":
> form = ReuseForm(request.POST)
> if form.is_valid():
> reuse = form.save(commit=False)
> # if reuse.get_choices.count() == 1 : reuse.m=0.075
(this doesn't work either)
> # elif reuse.get_choices.count() == 2 : reuse.m=0.15
> # elif reuse.get_choices.count() == 3 : reuse.m=0.225
> # elif reuse.get_choices.count() == 4 : reuse.m=0.3
Rather than calling the method so many times it's better to call it once
and assign the result to a variable. Also in this case you can compute m
from the count
> reuse.save()
> return redirect('../22')
> else:
> form = ReuseForm()
> return render(request, 'questionnaire/reuse.html', {'form':form})
>
> And the form I'm using is:
>
> class ReuseForm(forms.ModelForm):
>
> class Meta:
> model = Reuse
> fields = ('reuse',)
>
> Please, have you got any suggestions;
By the way I don't know what the effect is of defining a function in a
model. Someone else will have to deal with that. I suggest you fix problems
I've pointed out run the program tell us exactly what goes wrong and where
>
>
>
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