How do I pass parameter to the form in Django? - django

Question

So as the title states, I'm trying to pass a parameter from views to forms. I've seen several Stack Overflow posts regarding this issue, but none of them solved my problem :(
So what I'm trying to build is basically a question-and-answer application. Each user answers to pre-provided questions. I want to make an answering template for each corresponding question. So here's my code:
forms.py
class AnswerForm(forms.ModelForm):
main_answer = formsCharField(required=True)
# Some other fields
def __init__(self, *args, **kwargs):
self.q = kwargs.pop('q')
super(AnswerForm, self).__init__(*args, **kwargs)
self.fields['main_answer'].label = q.main_question
views.py
def createAnswer(request, pk):
thisQuestion = Question.objects.get(question_number=pk)
AnswerFormSet = modelformset_factory(Answer, form=AnswerForm(q = thisQuestion), extra=1)
formset = AnswerFormSet(queryset=Answer.objects.filter(authuser=request.user.id, question_number=pk))
# And some other codes
I'm supposed to show this formset in my template using {% crispy_formset%}. However I keep getting this error: "name 'q' is not defined". What is the problem here?

Answer 1

You pass these when you construct the FormSet with the form_kwargs=… parameter [Django-doc]:
def createAnswer(request, pk):
thisQuestion = Question.objects.get(question_number=pk)
AnswerFormSet = modelformset_factory(Aswer, form=AnswerForm, extra=1)
formset = AnswerFormSet(
form_kwargs={'q': thisQuestion},
queryset=Answer.objects.filter(authuser=request.user.id, question_number=pk)
)
You also will get a name error, because you use q in the __init__ method, but q is not defined:
class AnswerForm(forms.ModelForm):
main_answer = formsCharField(required=True)
# Some other fields
def __init__(self, *args, **kwargs):
# ↓ assign to a local variable q
q = self.q = kwargs.pop('q')
super(AnswerForm, self).__init__(*args, **kwargs)
self.fields['main_answer'].label = q.main_question