在Django中保存ModelForm后获取主键

Question

保存ModelForm后如何获取主键？在验证并保存表单后,我想将用户重定向到contact_details视图,该视图需要联系人的主键.

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

该的ModelForm的保存方法返回保存的对象.

试试这个:

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

如果您设置了form.save(commit = False),因为您想要修改数据并且您具有多对多关系,那么答案会有所不同:

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