Возврат ДВУХ пользователей,а не ОДНОГО

class Cart(models.Model):
    owner = models.ForeignKey('Customer', verbose_name='Владелец', on_delete=models.CASCADE)
    product = models.ManyToManyField(CartProduct, blank=True, related_name='related_cart')
    total_products = models.PositiveIntegerField(default=0)
    final_price = models.DecimalField(max_digits=9, decimal_places=2, verbose_name='Общая цена')
    in_order = models.BooleanField(default=False)
    for_anonymous_user = models.BooleanField(default=False)
 
    def __str__(self):
        return str(self.id)
 
 
class Customer(models.Model):
    user = models.ForeignKey(User, verbose_name='Пользователь', on_delete=models.CASCADE)
    phone = models.CharField(max_length=20, verbose_name='Телефон')
    address = models.CharField(max_length=255, verbose_name='Адрес')
 
    def __str__(self):
        return "Покупатель: {} {}".format(self.user.first_name, self.user.last_name)

...
 
from .models import Notebook, Smartphone, Category, LatestProducts, Customer, Cart
...
 
class CartView(View):
    def get(self, request, *args, **kwargs):
        [B]customer = Customer.objects.get(user=request.user)[/B]
        cart = Cart.objects.get(owner=customer)
        categories = Category.objects.get_categories_for_left_sidebar()
        context = {
            'cart': cart,
            'categories': categories
        }
        return render(request, 'cart.html', context)

...
 
from .views import BaseView, ProductDetailView, CategoryDetailView, CartView
...
 
urlpatterns = [
   ...
    path('cart/', CartView.as_view(), name='cart'),
   ...
]

class CartView(View):
    def get(self, request, *args, **kwargs):
        customer = Customer.objects.get(user=request.user)#(эту строчку удаляем)
        cart = Cart.objects.get(owner=request.user)
        categories = Category.objects.get_categories_for_left_sidebar()
        context = {'cart': cart, 'categories': categories}
        return render(request, 'cart.html', context)