Extend class-based UpdateView to rate objects - django

Question

I have the following models that I need to create a form which allows for the updating of an existing Response (generated previously with a slug and then emailed to the respondent) and the creation of a Rating for each CV in CV.objects.all(). What's the easiest way to do this in Django. Currently I have a class-based UpdateView for Response and that's it.
class Response(models.Model):
first_name = models.CharField(max_length=200, null=True, blank=True)
last_name = models.CharField(max_length=200, null=True, blank=True)
email = models.EmailField(max_length=254)
slug = models.SlugField(max_length=32)
submited = models.BooleanField(default=False)
submit_time = models.DateTimeField(null=True, blank=True)
creation_time = models.DateTimeField(auto_now_add=True)
class CV(models.Model):
title = models.CharField(max_length=200)
image = models.ImageField(upload_to=content_file_name)
class Rating(models.Model):
cid = models.ForeignKey('CV')
rid = models.ForeignKey('Response')
score = models.IntegerField()
comment = models.TextField()

Answer 1

I eventually worked out how to do this. My code was as follows in case anyone is interested.
def add_response(request):
CVs = CV.objects.all()
if request.method == "POST":
ResForm = ResponseForm(request.POST, instance=Response())
RatForms = [RatingForm(request.POST, prefix=str(cv.id), instance=Rating(cid=cv)) for cv in CVs]
if ResForm.is_valid() and all([rf.is_valid() for rf in RatForms]):
new_response = ResForm.save(commit=False)
new_response.submit_time = datetime.now()
new_response.submited = True
new_response.save()
for rf in RatForms:
new_rating = rf.save(commit=False)
new_rating.rid = new_response
new_rating.save()
return HttpResponseRedirect('/thanks/')
else:
for i, _ in enumerate(RatForms):
RatForms[i].cv = CV.objects.filter(id=int(RatForms[i].prefix))[0]
print RatForms[i].cv
return render(request, 'response.html', {'response_form': ResForm, 'rating_forms': RatForms})
else:
ResForm = ResponseForm(instance=Response())
RatForms = [RatingForm(prefix=str(cv.id), instance=Rating(cid=cv)) for cv in CVs]
for i, _ in enumerate(RatForms):
RatForms[i].cv = CV.objects.filter(id=int(RatForms[i].prefix))[0]
print RatForms[i].cv
return render(request, 'response.html', {'response_form': ResForm, 'rating_forms': RatForms})