How to bind an order to a specific user to further display the order history in the profile?

Question

Django

#models.py
class Order(models.Model):
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)
    email = models.EmailField()
    address = models.CharField(max_length=250)
    postal_code = models.CharField(max_length=20)
    city = models.CharField(max_length=100)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    paid = models.BooleanField(default=False)

    class Meta:
        ordering = ('-created',)
        verbose_name = 'Заказ'
        verbose_name_plural = 'Заказы'

    def __str__(self):
        return 'Order {}'.format(self.id)

    def get_total_cost(self):
        return sum(item.get_cost() for item in self.items.all())


class OrderItem(models.Model):
    order = models.ForeignKey(Order, related_name='items',on_delete=models.CASCADE)
    product = models.ForeignKey(Product, related_name='order_items',on_delete=models.CASCADE)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    quantity = models.PositiveIntegerField(default=1)

    def __str__(self):
        return '{}'.format(self.id)

    def get_cost(self):
        return self.price * self.quantity
#forms.py 
class SignUpForm(UserCreationForm):
    first_name = forms.CharField(max_length=100, required=True)
    last_name = forms.CharField(max_length=100, required=True)
    email = forms.EmailField(max_length=250, help_text='eg. [email protected]')

    class Meta:
        model = User
        fields = ('first_name', 'last_name', 'username', 'password1', 'password2', 'email')

class OrderCreateForm(forms.ModelForm):
    class Meta:
        model = Order
        fields = ['first_name', 'last_name', 'email', 'address', 'postal_code', 'city']
#views,py
def signUpView(request):
    if request.method == 'POST':
        form = SignUpForm(request.POST)
        if form.is_valid():
            form.save()
            username = form.cleaned_data.get('username')
            signup_user = User.objects.get(username=username)
            user_group = Group.objects.get(name='User')
            user_group.user_set.add(signup_user)
    else:
        form = SignUpForm()
    return render(request, 'signup.html', {'form': form})
def order_create(request):
    cart = Cart.objects.get(cart_id=_cart_id(request))
    cart_item = CartItem.objects.filter(cart=cart,active=True)

    if request.method == 'POST':
        form = OrderCreateForm(request.POST)
        if form.is_valid():
            order = form.save()
            for item in cart_item:
                OrderItem.objects.create(order=order,
                                         product=item.product,
                                         price=item.product.price,
                                         quantity=item.quantity)
            # очистка корзины
            cart_item.delete()
            return render(request, 'created.html',
                          {'order': order})
    else:
        form = OrderCreateForm
    return render(request, 'create.html',
                  {'cart': cart_item, 'form': form})

Answer 1

orders are accepted and not from registered users

Answer 2

make a field in the Order model

user = models.ForegeinKey(Users, verbose_name = _("Пользователь"), on_delete=models.SET_NULL, null=True, blank=True)

When saving \ creating, push from request.user