Django级联保存？

Question

我的用户注册表单上有一个方法,如下所示:

def save(self):
    user = User(
        username = self.cleaned_data['username'],
        email = self.cleaned_data['email1'],
        first_name = self.cleaned_data['first_name'],
        last_name = self.cleaned_data['last_name'],
    )
    user.set_password(self.cleaned_data['password1'])
    user.profile = Profile(
        primary_phone = self.cleaned_data['phone'],
    )
    user.profile.address = Address(
        country = self.cleaned_data['country'],
        province = self.cleaned_data['province'],
        city = self.cleaned_data['city'],
        postal_code = self.cleaned_data['postal_code'],
        street1 = self.cleaned_data['street1'],
        street2 = self.cleaned_data['street2'],
        street3 = self.cleaned_data['street3'],
    )
    user.save()
    return user

问题是当我调用form.save()它时user按预期创建对象,但不保存他的配置文件或地址.为什么不级联并保存所有子模型？我怀疑我可以打电话user.profile.save()和user.profile.address.save()手动,但我想整个事情成功或失败在一起.最好的方法是什么？

---

当前解决方案

def save(self):
    address = Address(
        country = self.cleaned_data['country'],
        province = self.cleaned_data['province'],
        city = self.cleaned_data['city'],
        postal_code = self.cleaned_data['postal_code'],
        street1 = self.cleaned_data['street1'],
        street2 = self.cleaned_data['street2'],
        street3 = self.cleaned_data['street3'],
    )
    address.save()

    user = User(
        username = self.cleaned_data['username'],
        email = self.cleaned_data['email1'],
        first_name = self.cleaned_data['first_name'],
        last_name = self.cleaned_data['last_name'],
    )
    user.set_password(self.cleaned_data['password1'])
    user.save()

    profile = Profile(
        primary_phone = self.cleaned_data['phone'],
    )
    profile.address = address
    profile.user = user
    profile.save()

我不得不制作profile"中心"对象.需要设置profile.user = user而不是user.profile = profile使其工作(我猜因为关键在于配置文件模型,而不是在用户模型上).

---

更新的解决方案:

我从这篇文章中提出了这个答案的暗示.

现在我将模型表单分开并将逻辑移到视图中:

def register(request):
    if request.POST:
        account_type_form = forms.AccountTypeForm(request.POST)
        user_form = forms.UserForm(request.POST)
        profile_form = forms.ProfileForm(request.POST)
        address_form = forms.AddressForm(request.POST)

        if user_form.is_valid() and profile_form.is_valid() and address_form.is_valid():
            user = user_form.save()
            address = address_form.save()
            profile = profile_form.save(commit=False)
            profile.user = user
            profile.address = address
            profile.save()
            return HttpResponseRedirect('/thanks/')
    else:
        account_type_form = forms.AccountTypeForm()
        user_form = forms.UserForm()
        profile_form = forms.ProfileForm()
        address_form = forms.AddressForm()

    return render_to_response(
        'register.html',
        {'account_type_form': account_type_form, 'user_form': user_form, 'address_form': address_form, 'profile_form': profile_form},
        context_instance=RequestContext(request)
    )

我不太喜欢将负担转移到视图上,但我想我会通过这种方式获得更多灵活性？

Answer 1

它不会级联保存,因为它实际上并不知道是否需要保存其他对象.

要一次性完成,首先要开始一个事务:

@transaction.commit_on_success
def save(self):
  ....

然后按顺序保存子对象:

  user.profile.address.save()
  user.profile.save()
  user.save()