size date not saving in cartitem model but the product is saving.. Any solution how to save the size-CodePudding

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

XXX

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

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CodePudding user response：

I don't know what's the exact problem, but I'd recommend to use get_object_or_404(), and also creating instance directly using create() instead of first creating then updating, so try below view:

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'))

CodePudding user response：

Get the id of variant instead of name. Just send the id with ajax like how you got the same object's name.

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_id = request.GET.get('variant_id')
        size_variant = SizeVariant.objects.get(id=variant_id)
        color_variant = ColorVariant.objects.get(id=variant_id)
        cart_item.color_variant = color_variant
        cart_item.size_variant = size_variant
        cart_item.save()

    return HttpResponseRedirect(request.META.get('HTTP_REFERER'))

I can help you out about ajax if you can share the ajax side of this page.