text: from django import template
  from core.models import Order
  
  register = template.Library()
  
  
  @register.filter
  def cart_item_count(user):
      if user.is_authenticated:
          qs = Order.objects.filter(user=user, ordered=False)
          if qs.exists():
              return qs[0].items.count()
      return 0
  