Question

class Product(models.Model):
    title           = models.CharField(max_length=120)
    slug            = models.SlugField(blank=True)
    description     = models.TextField()
    price           = models.DecimalField(decimal_places=2, max_digits=20, default=39.99)
    image           = models.ImageField(upload_to=upload_image_path,null=True, blank=True)
    featured        = models.BooleanField(default=False)
    # quantity        = models.IntegerField(default=1, null=True, blank=True)
    active          = models.BooleanField(default=True)
    timestamp       = models.DateTimeField(auto_now_add=True)

class OrderItem(models.Model):
    user = models.ForeignKey(User, null=True, blank=True, on_delete=models.CASCADE)
    ordered = models.BooleanField(default=False)
    item = models.ForeignKey(Product, on_delete=models.CASCADE)
    quantity = models.IntegerField(default=1)


class Cart(models.Model):
    user        = models.ForeignKey(User,null=True, blank=True,on_delete=models.CASCADE)
    products    = models.ManyToManyField(OrderItem, blank=True)
    subtotal    = models.DecimalField(default=0.00, max_digits=100, decimal_places=2)
    total       = models.DecimalField(default=0.00,max_digits=100,decimal_places=2)
    updated     = models.DateTimeField(auto_now=True)
    timestamp   = models.DateTimeField(auto_now_add=True)

"""i am trying to create a ecom website and trying to add products in cart without login 
   the below code works with login user as request.user how to change it with guest user 
"""

def add_cart(request, slug):
    item = get_object_or_404(Product,slug=slug)
    order_item ,created = OrderItem.objects.get_or_create(
        user=request.user,
        item =item,
    )
    print(order_item)

    order_qs = Cart.objects.filter(user=request.user)
    if order_qs.exists():
        order= order_qs[0]
        # check if the order item is in the order
        if order.products.filter(item__slug=item.slug).exists():
            order_item.quantity+= 1
            order_item.save()
            print("1")
        else:
            order.products.add(order_item)
    else:
        order = Cart.objects.create(
            user=request.user
        )
        order.products.add(order_item)
        print("done")
    return redirect("cart:home")

我正在尝试创建一个ecom网站，并尝试在没有以下代码的情况下在购物车中添加产品，但该代码仅适用于具有request.user的登录用户。用户如何与来宾用户进行更改并执行添加购物车和数量以访客用户身份访问产品

Answer 1

您可以在数据库中创建一个代表来宾用户的特定用户，然后将购物车分配给该用户。但是，我不建议这样做。

我假设您希望访客能够保存他们的购物车。您也可以通过设置包含购物车数据的cookie来实现。您不需要任何后端，因为可以使用javascript构建。

Answer 2

您需要使用Django Sessions Framework实现此目的。 Django Sessions Framework

我不确定这是否是最好的解决方案，但是以下代码对我来说很有吸引力。如果不想使用JavaScript，而只想坚持Django Sessions Framework，请使用此方法。

在购物车模型中：

class Cart(models.Model):
  user        = models.ForeignKey(User,null=True, blank=True,on_delete=models.CASCADE)
  products    = models.ManyToManyField(OrderItem, blank=True)
  subtotal    = models.DecimalField(default=0.00, max_digits=100, decimal_places=2)
  total       = models.DecimalField(default=0.00,max_digits=100,decimal_places=2)
  updated     = models.DateTimeField(auto_now=True)
  timestamp   = models.DateTimeField(auto_now_add=True)
  ordered     = models.BooleanField(default=False)
  session_key = models.CharField(max_length=40, null=True)

在您的视图中。py

def add_cart(request, slug):
if request.user.is_authenticated:
    item = get_object_or_404(Product,slug=slug)
    order_item ,created = OrderItem.objects.get_or_create(
        user=request.user,
        item =item,
    )
    print(order_item)

    order_qs = Cart.objects.filter(user=request.user, ordered=False)
    if order_qs.exists():
        order= order_qs[0]
        # check if the order item is in the order
        if order.products.filter(item__slug=item.slug).exists():
            order_item.quantity+= 1
            order_item.save()
            print("1")
        else:
            order.products.add(order_item)
    else:
        order = Cart.objects.create(
            user=request.user
        )
        order.products.add(order_item)
        print("done")
    return redirect("cart:home")
else:
    item = get_object_or_404(Product,slug=slug)
    order_item ,created = OrderItem.objects.get_or_create(
        user=None,
        item =item,
    )
    print(order_item)

    order_qs = Cart.objects.filter(user=None, ordered=False, session_key=request.session.session_key)
    if order_qs.exists():
        order= order_qs[0]
        # check if the order item is in the order
        if order.products.filter(item__slug=item.slug).exists():
            order_item.quantity+= 1
            order_item.save()
            print("1")
        else:
            order.products.add(order_item)
    else:
        order = Cart.objects.create(
            user=None, session_key=request.session.session_key
        )
        order.products.add(order_item)
        print("done")
    return redirect("cart:home")

进一步参考： Thanks to Todor Django: Anonymous session & "temporary" one-to-one related model?

django来宾用户添加到购物车

2 个答案: