Django - field missing from cleaned data - django

Question

I am using model form and I'm trying to bypass validation of one particular field.
I have ascertained that I need use the clean() method to bypass the field. however when im printing out the cleaned data the assigned_subnets field is not in the dictionary, it is missing
actions:
I create the assigned subnet field manually in forms.py. Then using jquery I alter that form field and add more select options to it post all the options. The additional values posted were not part of the original field choices, hence the error.
output from print:
{'site_data': None, 'switches': None, 'hostname': 'STR--RTR-01', 'template': <ConfigTemplates: STR-RTR-01>, 'model': <DeviceModel: Cisco - 4431>, 'install_date': datetime.date(2016, 5, 26), 'ospf_area': None, 'snmp_data': <SNMPData: XXXX>, 'available_subnets': <QuerySet []>}
forms.py
class DeviceForm(forms.ModelForm):
class Meta:
model = DeviceData
fields = ['site_data', 'switches', 'hostname', 'template', 'model', 'install_date','ospf_area','snmp_data']
def clean(self):
super(DeviceForm, self).clean()
print(self.cleaned_data)
if self.cleaned_data.get('assigned_subnets') in self._errors:
del self._errors['assigned_subnets']
return self.cleaned_data
def __init__(self, *args, **kwargs):
site_id = kwargs.pop('site_id', None)
device_id = kwargs.pop('device_id', None)
self.is_add = kwargs.pop("is_add", False)
super(DeviceForm, self).__init__(*args, **kwargs)
devicesubnet = Subnets.objects.filter(devicesubnets__device_id=device_id)
sitesubnet = Subnets.objects.filter(sitesubnets__site_id=site_id)
common_subnets = list(set(devicesubnet) & set(sitesubnet))
subnet_id_list = []
for s in common_subnets: subnet_id_list.append(s.id)
available_subnet_data = sitesubnet.exclude(id__in=subnet_id_list)
assigned_choices = []
devicesubnet_data = DeviceSubnets.objects.filter(device_id=device_id)
for choice in devicesubnet_data:
assigned_choices.append((choice.subnet.id,choice.subnet.subnet))
self.fields['available_subnets'] = forms.ModelMultipleChoiceField(
label='Available Subnets',
queryset=available_subnet_data,
widget = forms.SelectMultiple(
attrs = {'class': 'form-control', 'size' : '15'}
)
)
self.fields['assigned_subnets'] = forms.MultipleChoiceField(
label='Assigned Subnets',
choices=assigned_choices,
widget = forms.SelectMultiple(
attrs = {'class': 'form-control', 'size' : '15'}
)
)
self.fields['available_subnets'].required = False
self.fields['assigned_subnets'].required = False
self.helper = FormHelper(self)
self.helper.form_id = 'device_form'
self.helper.form_method = 'POST'
...
views.py
class EditDevice(UpdateView):
model = DeviceData
form_class = DeviceForm
template_name = "config/device_form.html"
#method_decorator(user_passes_test(lambda u: u.has_perm('config.edit_device')))
def dispatch(self, *args, **kwargs):
self.site_id = self.kwargs['site_id']
self.site = get_object_or_404(SiteData, pk=self.site_id)
return super(EditDevice, self).dispatch(*args, **kwargs)
def get_success_url(self, **kwargs):
return reverse_lazy("config:device_details", args=(self.site_id,))
def form_valid(self, form):
form.instance.site_data = self.site
assigned_subnets = form.cleaned_data['assigned_subnets']
print(assigned_subnets)
return super(EditDevice, self).form_valid(form)
def get_form_kwargs(self, *args, **kwargs):
kwargs = super().get_form_kwargs()
kwargs['site_id'] = self.site_id
kwargs['device_id'] = self.object.pk
return kwargs
...
EDIT:
what im trying to do is like in the image below. I have a list of available subnets and a list of chosen (assigned) subnets.
I don think this form widget exists outside of Django admin? so Ive created the two fields manually and used jquery to move a subnet from available to assigned.
then I get the assigned subnets and update the DB. however I get the errors when I alter the assigned field