RelatedObjectDoesNotExist at / CustomUser 没有客户

Question

Hlw，我正在开发一个 Djang0 2.2.15 项目，我使用 allauth 设置我的用户帐户，我使用了一个名为 def cartData(request): in utils.py 的函数，我在 views.py 函数中调用了该函数，

    def cartData(request):
    if request.user.is_authenticated:
         customer = request.user.customer
         order, created = 
         Order.objects.get_or_create(customer=customer, 
         complete=False)
         items = order.orderitem_set.all()
         cartItems = order.get_cart_items
     else:
          cookieData = cookieCart(request)
          cartItems = cookieData['cartItems']
          order = cookieData['order']
          items = cookieData['items']

      return {'cartItems':cartItems ,'order':order, 'items':items}

在models.py中，我与用户使用onetoone关系的类是，

from django.db import models
from django.conf import settings
from django.urls import reverse
from django.contrib.auth import get_user_model

class Customer(models.Model):
     user = models.OneToOneField(settings.AUTH_USER_MODEL, null=True, 
     blank=True, on_delete=models.CASCADE)
     name = models.CharField(max_length=200, null=True)
     email = models.CharField(max_length=200)
 
     def __str__(self):
         return self.name

但是每当我运行我的项目时，我都会在控制台上发现这个错误，

users.models.CustomUser.customer.RelatedObjectDoesNotExist: CustomUser 
has no customer.

浏览器中的错误信息截图如下，

Browser error message Browser error message

我从中创建用户的forms.py，代码如下

class CustomUserCreationForm(UserCreationForm):

    class Meta:
        model = get_user_model()
        fields = ('email', 'username',)

类 CustomUserChangeForm(UserChangeForm)：

    class Meta:
        model = get_user_model()
        fields = ('email', 'username',)

users/views.py的代码如下，

from django.views import generic

from .forms import CustomUserCreationForm

class SignupPageView(generic.CreateView):
    form_class = CustomUserCreationForm
    success_url = reverse_lazy('login')
    template_name = 'signup.html'

Answer 1

好吧，CustomUserCreationForm 的代码应该只创建 User 实例，它不会创建任何 Customer 实例。因此，您可以更改表单代码来创建 Customer 对象。像这样：

#create_form
class CustomUserCreationForm(UserCreationForm):

    class Meta:
        model = get_user_model()
        fields = ('email', 'username',)

    def save(self, commit=False):
        user = super().save(commit=True)
        # Creating the customer object
        Customer.objects.create(user=user, name=self.cleaned_data['name'], email=self.cleaned_data['email'])
        return user

# update form
class CustomUserChangeForm(UserChangeForm):

    class Meta:
        model = get_user_model()
        fields = ('email', 'username',)

    def save(self, commit=False):
          user = super().save(commit=True)
          Customer.objects.update_or_create(user=user, name=self.cleaned_data['name'], email=self.cleaned_data['email'], defaults={'user':user})
          return user

仅供参考，您不需要存储 email 和 name 信息，因为它已经存储在 User 模型中。如果您需要访问它们，请使用 user.customer.name 或 user.customer.email。