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SOLVED: Django Cart and Item Model - getting quantity to update


I am working on a Django Cart application. I have two models Cart and Item. I am trying to get the quantity to update when an Item is added to the basket but cant get the views to work properly. I am having problems getting item_obj assignment to work - do I need to do anything with the model manager here? Any help is really appreciated.

class Cart(models.Model):
user = models.ForeignKey(User, null=True, blank=True)
products = models.ManyToManyField(Product, blank=True)
total = models.DecimalField(default=0.00, max_digits=10, decimal_places=2)
updated = models.DateTimeField(auto_now=True)
timestamp = models.DateTimeField(auto_now_add=True)

objects = CartManager()

def __str__(self):
return str(

class Item(models.Model):
item = models.ForeignKey(Product, null=True)
cart = models.ForeignKey(Cart, null=True)
quantity = models.PositiveIntegerField() extract

def cart_update(request):
product_id = request.POST.get('product_id')
product_obj = Item.objects.get(id=product_id)
item_obj = Item.objects.get(id=product_id)
cart_obj, new_obj = Cart.objects.new_or_get(request)
if item_obj in cart_obj.products.all():
item_obj.quantity += 1
return redirect("cart:home")

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SOLVED: Django Cart and Item Model - getting quantity to update


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