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()它创建 user按预期对象，但不保存他的个人资料或地址。为什么不级联保存所有子模型？我怀疑我可以调用 user.profile.save()和 user.profile.address.save()手动，但我希望整个事情一起成功或失败。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()

我必须制作 profile “中心”对象。需要设置 profile.user = user而不是 user.profile = profile让它工作(我猜是因为关键在配置文件模型上，而不是在用户模型上)。

较新的解决方案:

我从 this article 那里得到了提示建议在 this answer .

现在我已经分离了我的模型表单并将逻辑移到了 View 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 View 上，但我想这样我会获得更多的灵 active ？

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。

一次性完成，首先start a transaction :

@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()