59 lines
1.3 KiB
Python
59 lines
1.3 KiB
Python
import typing
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from sqlalchemy.sql import desc, func
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from models import Location, Order, OrderItem, Product, User
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class FatModel:
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@classmethod
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def all(cls):
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return cls.query.all()
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@classmethod
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def amount(cls):
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return cls.query.count()
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class FatLocation(Location, FatModel):
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pass
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class FatOrder(Order, FatModel):
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# It's hard to add the unique user constraint,
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# as DISTINCT seems to apply after a GROUP BY and aggregate
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# So DISTINCT ... count(user_id) ... will count all users,
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# even if they get reduced by the disctinct afterwards.
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@classmethod
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def items_per_order(cls):
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return (
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Order.query.join(OrderItem)
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.group_by(Order.id)
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.with_entities(Order.id, func.count(OrderItem.user_id).label("total"))
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)
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class FatUser(User, FatModel):
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pass
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class FatOrderItem(OrderItem, FatModel):
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pass
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class FatProduct(Product, FatModel):
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@classmethod
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def top4(cls) -> None:
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top4 = (
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OrderItem.query.join(Product)
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.join(Location)
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.group_by(Product.id)
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.with_entities(
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Product.name, Location.name, func.count(Product.id).label("count")
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)
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.order_by(desc("count"))
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.limit(4)
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)
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for top in top4:
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print(top)
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