How to save many-to-many data using form.instance? - django

Question

I am writing an application on Django.
How can I save data (provider.category) from form using form.instance.
models
class RequestProvider(models.Model):
category = models.ManyToManyField(Category, related_name="provider_request")
forms
class ProviderForm(forms.ModelForm):
class Meta:
model = RequestProvider
fields = ('category',)
widgets = {
'category': forms.SelectMultiple(
attrs={
'class': 'select2',
'style': 'width: 246px;'
}
),
}
views
#method_decorator(currency_account_dec, name='dispatch')
class ProviderCreateView(CreateView):
form_class = ProviderForm
template_name = 'provider_create.html'
def form_valid(self, form):
provider_id = self.kwargs.get('provider_id',None)
session_user = self.request.user
if provider_id:
form.instance.provider = Provider.objects.get(pk=provider_id)
form.instance.user = self.request.user
#form.instance.category = form.cleaned_data.get('category')
return super(ProviderCreateView,self).form_valid(form)
def get_context_data(self, **kwargs):
provider_id = self.kwargs.get('provider_id',None)
ss = RequestProvider.objects.filter(user=self.request.user)
for s in ss:
print(s.category)
ctx = super(ProviderCreateView, self).get_context_data(**kwargs)
ctx['organizations'] = Organization.objects.filter(user=self.request.user)
ctx['payments'] = Payment.objects.all()
if provider_id:
this_provider = Provider.objects.get(pk=provider_id)
ctx['this_provider'] = this_provider
ctx['categories'] = Category.objects.all()
ctx['roles'] = this_provider.role.all()
ctx['payments'] = Payment.objects.all()
ctx['deliveries'] = Delivery.objects.all()
return ctx

Answer 1

I believe you can do form.save()

Answer 2

No need to rewrite the form_valid.
#method_decorator(currency_account_dec, name='dispatch')
class ProviderCreateView(CreateView):
form_class = ProviderForm
template_name = 'provider_create.html'
def post(self, request):
provider_id = self.kwargs.get('provider_id',None)
session_user = request.user
form = ProviderForm(request.POST)
if form.is_valid():
rq = form.save(commit=False)
if provider_id:
rq.provider = Provider.objects.get(pk=provider_id)
rq.user = self.request.user
rq.save()
rq.category = form.cleaned_data.get('category')
return HttpResponseRedirect('/providers/')
else:
return HttpResponseRedirect('/providers/create/')