Using Django CreateView to handle formset - It doesnt validate - django

Question

The problem
I'm trying to modify the class-based view 'CreateView' to handle a formset instead of a form.
When client does a GET request, the formset is displayed to the client correctly.
The problem is when the client submit the form with a POST.
When Django recieve POST, it lands in form_invalid() and the form.errors say 'this field is required' for the length and name field.
class Service(models.Model):
TIME_CHOICES = (
(15, '15 minutes'),
(30, '30 minutes'),
)
length = models.FloatField(choices=TIME_CHOICES,max_length=6)
name = models.CharField(max_length=40)
class ServiceForm(ModelForm):
class Meta:
model = Service
ServiceFormSet = modelformset_factory(Service,form=ServiceForm)
class ServiceEditView(CreateView):
template_name = "service_formset.html"
model = Service
form_class = ServiceForm
success_url = 'works/'
def form_valid(self, form):
context = self.get_context_data()
formset = context['formset']
if formset.is_valid():
self.object = form.save()
return HttpResponseRedirect('works/')
else:
return HttpResponseRedirect('doesnt-work/')
def form_invalid(self, form):
print form.errors
return HttpResponseRedirect('doesnt-work/')
def get_context_data(self, **kwargs):
context = super(ServiceEditView, self).get_context_data(**kwargs)
if self.request.POST:
context['formset'] = ServiceFormSet(self.request.POST)
else:
context['formset'] = ServiceFormSet(queryset=Service.objects.filter(user__exact=self.request.user.id))
return context
My question is
How can I use a createview to handle a formset?
What am I missing to get it do validate correctly?
The tutorial I've taken most of the bits from so far http://haineault.com/blog/155/
In short, what I've done so far
Since the form.errors variable say each field is required, I think it expects a regular form not a formset -> I'm missing some option that tell the CreateView it's a formset.
I've also tried the solution suggested here: http://www.kevinbrolly.com/.
class BaseServiceFormSet(BaseModelFormSet):
def __init__(self, *args, **kwargs):
super(BaseServiceFormSet, self).__init__(*args, **kwargs)
for form in self.forms:
form.empty_permitted = False
But it didnt make any difference.

Answer 1

Solution
pip install django-extra-views
And in view.py:
from extra_views import FormSetView
class ItemFormSetView(ModelFormSetView):
model = Service
template_name = 'service_formset.html'
There's a discussion about getting this into Django core, but the discussions seems to have stagnated.
https://code.djangoproject.com/ticket/16256
Where I found the solution
At this repository https://github.com/AndrewIngram/django-extra-views
there's a view called ModelFormSetView, which does exactly what I needed.
It's a class-based view, that does the same as CreateView, but for formsets.

Answer 2

Django go into form_invalid() and the form.errors say 'this field is required' for the length and name field.
This is normal and due to the required field paramatere:
By default, each Field class assumes the value is required, so if you
pass an empty value -- either None or the empty string ("") -- then
clean() will raise a ValidationError exception:
If you want to inverse that, you can set required=False:
class Service(models.Model):
TIME_CHOICES = (
(15, '15 minutes'),
(30, '30 minutes'),
)
length = models.FloatField(choices=TIME_CHOICES,max_length=6, required=False)
name = models.CharField(max_length=40, required=False)
What am I missing to get it do validate correctly
Did you try to post a form with name and length values ?