Django add value to hidden field inline formset - django

Question

I am using Django 1.11. I am trying to add a value to a hidden field in an inline formset form. I have tried unsuccessfully inserting the hidden field value at various points of def get_context_data and def form_valid. The code I am using is as follows:
views.py
#method_decorator(login_required, name='dispatch')
class DocumentCreate(CreateView):
model = DocumentClient
success_url = reverse_lazy('documents')
form_class = DocumentForm
def get_context_data(self, **kwargs):
data = super(DocumentCreate, self).get_context_data(**kwargs)
if self.request.POST:
data['docform'] = DocumentFormSet(self.request.POST, self.request.FILES)
else:
data['docform'] = DocumentFormSet()
return data
def form_valid(self, form):
context = self.get_context_data()
docform = context['docform']
if docform.is_valid():
self.object = form.save()
docform.instance = self.object
docform.save()
return HttpResponseRedirect('documents')
else:
return self.render_to_response(self.get_context_data(form=form))
forms.py
class DocumentForm(ModelForm):
class Meta:
model = DocumentClient
exclude = ()
widgets = {
'cnum': HiddenInput(),
}
def __init__(self, *args, **kwargs):
super(DocumentForm, self).__init__(*args, **kwargs)
for field in self.fields:
self.fields['cnum'].required = False
class DocumentDetailForm(ModelForm):
class Meta:
model = DocumentDetail
exclude = ()
widgets = {
'document_date': DateInput(),
}
def __init__(self, *args, **kwargs):
super(DocumentDetailForm, self).__init__(*args, **kwargs)
self.fields['document_description'].required = False
DocumentFormSet = inlineformset_factory(DocumentClient, DocumentDetail, form=DocumentDetailForm, extra=10, can_delete=False)
The hidden field 'cnum' is that what I am trying to insert a value for capturing in the model. Is anyone able to provide any guidance on how to acheive this? Any assistance is gratefully appreciated!

Answer 1

In DocumentCreate, have you tried this?
class DocumentCreate(CreateView):
def get_initial(self):
# Get initial value from kwargs (If needed) and save as instance variable.
self.cnum_val = self.kwargs.get('cnum_value')
def form_valid(self, form):
# Insert your desired value to cnum (or you can simply forget get_initial and supply whatever value here)
form.instance.cnum = self.cnum_val
self.object = form.save()
...
self.render_to_response(self.get_context_data(form=form))
form.instance refers to the unsaved model object used by the form
See here also.