Python Django-post_保存创建信号后出现RelatedObjectDoesNotExister错误

我有一个通用的用户配置文件模型，它有几个角色——客户端、翻译人员和编辑器。我在accounts应用程序中创建的扩展用户模型中使用了一对一的关系，我使用Django post_save signal自动创建了一个与用户相关的配置文件实例，效果很好。 现在问题来了：我需要有特定于角色的配置文件模型，如客户端配置文件、转换器配置文件等。我再次尝试使用Django post_save signal创建一个与主UserProfile模型相关的{role}配置文件对象，我得到以下错误：

Traceback (most recent call last):
  File "D:\Django\tct\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "D:\Django\tct\venv\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\admin\options.py", line 614, in wrapper
    return self.admin_site.admin_view(view)(*args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\utils\decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\views\decorators\cache.py", line 44, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\admin\sites.py", line 233, in inner
    return view(request, *args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\utils\decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\views\decorators\debug.py", line 89, in sensitive_post_parameters_wrapper
    return view(request, *args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\utils\decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\utils\decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\auth\admin.py", line 99, in add_view
    return self._add_view(request, form_url, extra_context)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\auth\admin.py", line 126, in _add_view
    return super().add_view(request, form_url, extra_context)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\admin\options.py", line 1653, in add_view
    return self.changeform_view(request, None, form_url, extra_context)
  File "D:\Django\tct\venv\lib\site-packages\django\utils\decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\utils\decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\admin\options.py", line 1534, in changeform_view
    return self._changeform_view(request, object_id, form_url, extra_context)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\admin\options.py", line 1580, in _changeform_view
    self.save_model(request, new_object, form, not add)
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\admin\options.py", line 1093, in save_model
    obj.save()
  File "D:\Django\tct\venv\lib\site-packages\django\contrib\auth\base_user.py", line 67, in save
    super().save(*args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\base.py", line 753, in save
    self.save_base(using=using, force_insert=force_insert,
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\base.py", line 801, in save_base
    post_save.send(
  File "D:\Django\tct\venv\lib\site-packages\django\dispatch\dispatcher.py", line 177, in send
    return [
  File "D:\Django\tct\venv\lib\site-packages\django\dispatch\dispatcher.py", line 178, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))
  File "D:\Django\tct\src\profiles\models.py", line 73, in create_user_profile
    UserProfile.objects.create(user=instance)
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\query.py", line 447, in create
    obj.save(force_insert=True, using=self.db)
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\base.py", line 753, in save
    self.save_base(using=using, force_insert=force_insert,
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\base.py", line 801, in save_base
    post_save.send(
  File "D:\Django\tct\venv\lib\site-packages\django\dispatch\dispatcher.py", line 177, in send
    return [
  File "D:\Django\tct\venv\lib\site-packages\django\dispatch\dispatcher.py", line 178, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))
  File "D:\Django\tct\src\clients\models.py", line 32, in save_client_profile
    instance.clientprofile.save()
  File "D:\Django\tct\venv\lib\site-packages\django\db\models\fields\related_descriptors.py", line 421, in __get__
    raise self.RelatedObjectDoesNotExist(

Exception Type: RelatedObjectDoesNotExist at /admin/accounts/user/add/
Exception Value: UserProfile has no clientprofile.

通用剖面模型 客户端配置文件模型 具有“角色”字段的自定义注册表单

---

它正在运行

save_client_profile

，并抱怨

UserProfile

没有附加

client_profile

。未满足

create\u client\u profile

的

role==1

条件，因为创建时未设置UserProfile的角色

---

SignUpForm

的

save（）

方法当前在内存中设置角色，但不会将其提交到数据库，因为

user.save（）

只保存用户模型，而不保存其相关的用户配置文件。您需要在

user.userprofile.role=self.cleaned\u data.get（“role”）

之后执行

user.userprofile.save（）

，角色才能持久。

谢谢您的回答，但我正在使用用户注册表单填充角色字段，该表单当前继承自django allauth SignupForm类。我认为它工作得很好，而且我在注册视图中可以选择角色。编辑了问题并添加了表单。看起来您没有在save（）方法中保存UserProfile，只有用户：

user.UserProfile.save（）

在设置角色后应该这样做。omg！你说得对。在注册表单的保存功能中保存用户之后，我只需要保存用户配置文件。编辑答案，以便我可以将其标记为已接受。谢谢，太好了，我已经编辑过了。

class User(AbstractUser):
    id = models.UUIDField(
        _("User ID"), primary_key=True, default=uuid.uuid4, editable=False
    )

class UserProfile(models.Model):
    # General Info
    CLIENT = 1
    TRANSLATOR = 2
    EDITOR = 3
    ROLE_CHOICES = (
        (CLIENT, _("Client")),
        (TRANSLATOR, _("Translator")),
        (EDITOR, _("Editor")),
    )
    MALE = 1
    FEMALE = 2
    GENDER_CHOICES = ((MALE, _("Male")), (FEMALE, _("Female")))
    user = models.OneToOneField(
        User, verbose_name=_("User"), on_delete=models.CASCADE, primary_key=True
    )
    role = models.PositiveSmallIntegerField(
        _("Role"), choices=ROLE_CHOICES, null=True, blank=True
    )
    bio = models.TextField(_("Bio"), null=True, blank=True)
    avatar = models.ImageField(
        _("Avatar"), upload_to="profiles/profile/avatar/", blank=True
    )
    gender = models.PositiveSmallIntegerField(
        _("Gender"), choices=GENDER_CHOICES, null=True, blank=True
    )

    # Contact Info
    phone = models.CharField(_("Phone"), max_length=20, null=True, blank=True)
    cell = models.CharField(_("Cell"), max_length=20, null=True, blank=True)
    id_number = models.CharField(_("ID Number"), max_length=20, null=True, blank=True)
    address = models.TextField(_("Address"), null=True, blank=True)
    postal_code = models.CharField(
        _("Postal Code"), max_length=20, null=True, blank=True
    )
    website_url = models.URLField(
        _("Website URL"), max_length=200, null=True, blank=True
    )
    instagram_username = models.CharField(
        _("Instagram Username"), max_length=200, null=True, blank=True
    )
    telegram_username = models.CharField(
        _("Telegram Username"), max_length=200, null=True, blank=True
    )
    twitter_username = models.CharField(
        _("Twitter Username"), max_length=200, null=True, blank=True
    )

    # Model Extra
    class Meta:
        verbose_name = _("User Profile")
        verbose_name_plural = _("User Profile")

    def __str__(self):
        return self.user.username

    def get_absolute_url(self):
        return reverse("profiles:user_profile_detail", args=[str(self.user.id)])


@receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    if created:
        UserProfile.objects.create(user=instance)


@receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
    instance.userprofile.save()

class ClientProfile(models.Model):
    profile = models.OneToOneField(
        UserProfile, verbose_name=_("User"), on_delete=models.CASCADE, primary_key=True
    )
    credit = models.IntegerField(_("Credit"), default=0, blank=True)
    debt = models.IntegerField(_("Debt"), default=0, blank=True)
    referral_code = ULIDField(default=default)
    referrals = models.ManyToManyField(
        User, verbose_name=_("Referrals"), related_name="client_profile"
    )
    income = models.IntegerField(_("Income"), default=0, blank=True)

@receiver(post_save, sender=UserProfile)
def create_client_profile(sender, instance, created, **kwargs):
    if created:
        if instance.role == 1:
            ClientProfile.objects.create(profile=instance)


@receiver(post_save, sender=UserProfile)
def save_client_profile(sender, instance, **kwargs):
    instance.clientprofile.save()

class CustomSignupForm(SignupForm):
    role = forms.ChoiceField(
        widget=forms.RadioSelect(), choices=UserProfile.ROLE_CHOICES, required=False, label=_("Role")
    )

    def save(self, request):

        # Ensure you call the parent class's save.
        # .save() returns a User object.
        user = super(CustomSignupForm, self).save(request)
        user.userprofile.role = self.cleaned_data.get("role")
        user.save()
        # You must return the original result.
        return user