Django, condition to check if query-set is empty

Question

I want to check if items queryset is empty or not.

order = Order.objects.get(customer=request.user.customer , complete=False)
items = order.orderitem_set.all()
flag = True
if items == None:
    flag = False

Answer 1

You can check this with .exists() [Django-doc] :

order = Order.objects.get(customer=request.user.customer, complete=False)
flag = order.orderitem_set  # True if at least one item