尺寸日期没有保存在cartitem模型中，但是产品正在保存。任何解决方案也如何保存大小数据？
尺寸日期没有保存在cartitem模型中，但是产品正在保存。任何解决方案也如何保存大小数据？
提问于 2022-08-22 11:46:40
views.py
def add_to_cart(request, pk):
variant = request.GET.get('variant')
product = Product.objects.get(pk =pk)
user = request.user
cart , _ = Cart.objects.get_or_create(user = user, is_paid = False)
cart_item = CartItem.objects.create(cart = cart , product = product ,)
if variant:
variant = request.GET.get('variant')
size_variant = SizeVariant.objects.get(size_name = variant)
color_variant = ColorVariant.objects.get(color_name = variant)
cart_item.color_variant = color_variant
cart_item.size_variant = size_variant
cart_item.save()
return HttpResponseRedirect(request.META.get('HTTP_REFERER'))models.py
class CartItem(models.Model):
cart = models.ForeignKey(Cart, on_delete=models.CASCADE)
product = models.ForeignKey(Product, on_delete=models.CASCADE)
color_variant = models.ForeignKey(ColorVariant, on_delete=models.CASCADE,null=True, blank=True)
size_variant = models.ForeignKey(SizeVariant, on_delete=models.CASCADE ,null=True, blank=True)
quantity = models.PositiveIntegerField(default=0)
coupon = models.ForeignKey(Coupon, on_delete=models.SET_NULL, null=True, blank=True)
22/Aug/2022 16:17:38 "GET /account/add_to_cart/1/?variant= HTTP/1.1“302 0
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16049.0
class SizeVariant(models.Model):
size_name = models.CharField(max_length=100)
price = models.IntegerField(default=0)
def __str__(self):
return self.size_name ------------------------------------------------------------///////
Stack Overflow用户
回答已采纳
发布于 2022-08-22 14:23:24
我不知道确切的问题，但我建议使用get_object_or_404()，并且直接使用create()创建实例，而不是先创建然后更新，所以尝试下面的视图：
def add_to_cart(request, pk):
variant = request.GET.get('variant')
product = get_object_or_404(Product,pk=pk)
user = request.user
cart , _ = Cart.objects.get_or_create(user = user, is_paid = False)
if variant:
size_variant = get_object_or_404(SizeVariant,size_name=variant)
color_variant = get_object_or_404(ColorVariant,color_name=variant)
CartItem.objects.create(cart = cart, product = product,color_variant=color_variant,size_variant=size_variant)
return HttpResponseRedirect(request.META.get('HTTP_REFERER'))页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/73444585
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