Don't use cookies for processing eboutic baskets

eboutic/models.py

@@ -40,6 +40,7 @@ def get_eboutic_products(user: User) -> list[Product]:
         .annotate(order=F("product_type__order"))
         .annotate(category=F("product_type__name"))
         .annotate(category_comment=F("product_type__comment"))
+        .annotate(price=F("selling_price"))
         .prefetch_related("buying_groups")  # <-- used in `Product.can_be_sold_to`
     )
     return [p for p in products if p.can_be_sold_to(user)]
@@ -84,6 +85,9 @@ class Basket(models.Model):
     def __str__(self):
         return f"{self.user}'s basket ({self.items.all().count()} items)"
 
+    def can_be_viewed_by(self, user):
+        return self.user == user
+
     @cached_property
     def contains_refilling_item(self) -> bool:
         return self.items.filter(
@@ -139,7 +143,7 @@ class Basket(models.Model):
                     club=product.club,
                     product=product,
                     seller=seller,
-                    customer=self.user.customer,
+                    customer=Customer.get_or_create(self.user)[0],
                     unit_price=item.product_unit_price,
                     quantity=item.quantity,
                     payment_method=payment_method,