Get Primary Key after Saving a ModelForm in Django

Question

How do I get the primary key after saving a ModelForm? After the form has been validated and saved, I would like to redirect the user to the contact_details view which requires the primary key of the contact.

def contact_create(request):     if request.method == 'POST':         form = ContactForm(request.POST)         if form.is_valid():             form.save()             return HttpResponseRedirect(reverse(contact_details, args=(form.pk,)))     else:         form = ContactForm() 

Answer 1

The ModelForm's save method returns the saved object.

Try this:

def contact_create(request):     if request.method == 'POST':         form = ContactForm(request.POST)         if form.is_valid():             new_contact = form.save()             return HttpResponseRedirect(reverse(contact_details, args=(new_contact.pk,)))     else:         form = ContactForm() 

Answer 2

In the case where you have set form.save(commit=False) because you want to modify data and you have a many-to-many relation, then the answer is a little bit different:

def contact_create(request):     if request.method == 'POST':         form = ContactForm(request.POST)         if form.is_valid():             new_contact = form.save(commit=False)             new_contact.data1 = "gets modified"             new_contact.save()             form.save_m2m()             return HttpResponseRedirect(reverse(contact_details, args=(new_contact.pk,)))     else:         form = ContactFrom() 

https://docs.djangoproject.com/en/1.3/topics/forms/modelforms/#the-save-method