count the selected checkboxes in a multipleselectfield
Please, I need your help because I'm trying to solve a problem
I'm making a questionnaire and I want to count the number of the selected
choices in a certain question
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()
def numchoices(self): (I
tried this but it didn't work)
self.choices_count = self.choice_set.count()
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
reuse.save()
return redirect('../22')
else:
form = ReuseForm()
return render(request, '../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;
Thank you in advance
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count the selected chechboxes in multipleselectfield
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()
def numchoices(self): (I tried
this but it didn't work)
self.choices_count = self.choice_set.count()
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
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;
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Re: count the selected chechboxes in multipleselectfield
On Wednesday, July 5, 2017 at 3:59:41 PM UTC+3, bob gailer wrote:
>
> On Jul 5, 2017 6:55 AM, "elloy" > 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
> >
>
I tried to make the changes you suggested like this:
models.py:
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)
views.py:
def reuse (request):
if request.method == "POST":
form = ReuseForm(request.POST)
if form.is_valid():
reuse = form.save(commit=False)
q = reuse.get_choices.count()
if q == 1 : reuse.m=0.075
elif q == 2 : reuse.m=0.15
elif q == 3 : reuse.m=0.225
elif q == 4 : reuse.m=0.3
reuse.save()
return redirect('../22')
else:
form = ReuseForm()
return render(request, '../reuse.html', {'form':form})
The error I get is the following:
>
>
> Exception Type: AttributeError
> Exception Value:
>
> 'Reuse' object has no attribute 'get_choices'
>
>
I' m trying to find an attribute of the multiselectfield or a filter that
will return the number of the selected checkboxes, every time a user answer
the question.
Thank you very much for your support
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