Form processing with class-based views
We can essentially process a form by subclassing the View
class itself:
class ClassBasedFormView(generic.View): template_name = 'form.html' def get(self, request): form = PersonDetailsForm() return render(request, self.template_name, {'form': form}) def post(self, request): form = PersonDetailsForm(request.POST) if form.is_valid(): # Success! We can use form.cleaned_data now return redirect('success') else: # Invalid form! Reshow the form with error highlighted return render(request, self.template_name, {'form': form})
Compare this code with the sequence diagram that we saw previously. The three scenarios have been separately handled.
Every form is expected to follow the post/redirect/get (PRG) pattern. If the submitted form is found to be valid, then it must issue a redirect. This prevents duplicate form submissions...