Как исправить ошибку django.db.utils.IntegrityError: NOT NULL constraint failed: index_cartbuy.cart_total?
Ошибка появилась, когда я решил сделать корзину для каждого пользователя.
вот модель корзины в которой ошибка
models.pyclass CartItem(models.Model):
ware = models.ForeignKey('Ware', on_delete=models.CASCADE,)
qty = models.PositiveIntegerField(default=1)
item_total = models.DecimalField(max_digits=9, decimal_places=0)
def __str__(self):
return "CartBuy item for ware {0}".format(self.ware.title)
class CartBuy(models.Model):
items_cart = models.ManyToManyField(CartItem, blank=True)
cart_total = models.DecimalField(max_digits=9, decimal_places=0)
def __str__(self):
return str(self.id)
и вьюшка
views.pydef cart_view(request):
try:
cart_id = request.session['cart_id']
cart = CartBuy.objects.get(id=cart_id)
request.session['total'] = cart.items_cart.count()
except:
cart = CartBuy()
cart.save()
cart_id=cart.id
request.session['cart_id'] = cart_id
cart = CartBuy.objects.get(id=cart_id)
context ={
'cart': cart
}
return render(request, 'cart.html', context)
def add_to_cart_view(request, ware_pk):
ware = Ware.objects.get(pk=ware_pk)
new_item, _ = CartItem.objects.get_or_create(ware=ware, item_total=ware.prise)
cart = CartBuy.objects.first()
if new_item not in cart.items_cart.all():
cart.items_cart.add(new_item)
cart.save()
return HttpResponseRedirect("/cart/")
else:
return HttpResponseRedirect("/")
def detail_ware(request, pk):
try:
cart_id = request.session['cart_id']
cart = CartBuy.objects.get(id=cart_id)
request.session['total'] = cart.items_cart.count()
except:
cart = CartBuy()
cart.save()
cart_id=cart.id
request.session['cart_id'] = cart_id
cart = CartBuy.objects.get(id=cart_id)
ware = Ware.objects.get(pk=pk)
context ={
'ware': ware,
'cart': cart
}
return render(request, 'detail_ware.html', context)
