def dec_item(self, db: DBManager, product_id, quantity=1):
"""
decrease number of order item
:param db: link to DBManager
:param product_id:
:param quantity:
:return:
"""
if self.order.id > 0:
# return quantity of product to store
if self.order_items._dec(product_id=product_id, quantity=quantity):
if db.increase_product(product_id=product_id,
quantity=quantity):
self.order_items._save(db)
def _del(self, db: DBManager, order_spec, product_id):
"""
delete order item position
:param db:
:param product_id:
:return:
"""
if product_id in self._orders:
order_item = self._orders[product_id]
numbers = self.number_positions
if db.increase_product(product_id=product_id,
quantity=order_item.quantity):
if numbers > 1:
if 1 < order_item.number < numbers or order_item.number == numbers:
self.current_prev(db)
elif order_item.number == 1:
self.current_next(db)
order_item.delete(db)
self._orders = OrderedDict()
self._load(db=db, order_spec=order_spec)