haldis/app/fatmodels.py
2020-07-17 11:40:15 +02:00

50 lines
1.1 KiB
Python

import typing
from sqlalchemy.sql import desc, func
from hlds.definitions import location_definitions
from hlds.models import Location, Dish
from models import Order, OrderItem, User
class FatModel:
@classmethod
def all(cls):
return cls.query.all()
@classmethod
def amount(cls):
return cls.query.count()
class FatLocation(Location, FatModel):
@classmethod
def all(cls):
return location_definitions
@classmethod
def amount(cls):
return len(location_definitions)
class FatOrder(Order, FatModel):
# It's hard to add the unique user constraint,
# as DISTINCT seems to apply after a GROUP BY and aggregate
# So DISTINCT ... count(user_id) ... will count all users,
# even if they get reduced by the disctinct afterwards.
@classmethod
def items_per_order(cls):
return (
Order.query.join(OrderItem)
.group_by(Order.id)
.with_entities(Order.id, func.count(OrderItem.user_id).label("total"))
)
class FatUser(User, FatModel):
pass
class FatOrderItem(OrderItem, FatModel):
pass