57 lines
1.3 KiB
Python
57 lines
1.3 KiB
Python
from sqlalchemy.sql import desc, func
|
|
|
|
from models import Location, Order, OrderItem, Product, User
|
|
|
|
|
|
class FatModel:
|
|
@classmethod
|
|
def all(cls):
|
|
return cls.query.all()
|
|
|
|
@classmethod
|
|
def amount(cls):
|
|
return cls.query.count()
|
|
|
|
|
|
class FatLocation(Location, FatModel):
|
|
pass
|
|
|
|
|
|
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
|
|
|
|
|
|
class FatProduct(Product, FatModel):
|
|
@classmethod
|
|
def top4(cls):
|
|
top4 = (
|
|
OrderItem.query.join(Product)
|
|
.join(Location)
|
|
.group_by(Product.id)
|
|
.with_entities(
|
|
Product.name, Location.name, func.count(Product.id).label("count")
|
|
)
|
|
.order_by(desc("count"))
|
|
.limit(4)
|
|
)
|
|
for top in top4:
|
|
print(top)
|