133 lines
5.2 KiB
Python
133 lines
5.2 KiB
Python
from app import db, login
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from flask_login import UserMixin
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from sqlalchemy.sql import text
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from sqlalchemy_utils.view import create_view
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from werkzeug.security import generate_password_hash, check_password_hash
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item_category = db.Table("item_category",
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db.Column("item", db.ForeignKey("item.id"), primary_key=True),
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db.Column("category", db.ForeignKey("category.id"), primary_key=True)
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)
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class User(UserMixin, db.Model):
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id = db.Column(db.String(10), primary_key=True)
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name = db.Column(db.String(64), nullable=False)
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password_hash = db.Column(db.String(128), nullable=False)
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Bought = db.relationship("Bought", backref='User', lazy='dynamic')
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def set_password(self, password):
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self.password_hash = generate_password_hash(password)
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def check_password(self, password):
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return check_password_hash(self.password_hash, password)
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def __repr__(self) -> str:
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return f"<User {self.id} ({self.name})>"
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class LoginToken(db.Model):
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user = db.Column(db.ForeignKey('user.id'), primary_key=True)
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token = db.Column(db.String(32), nullable=False)
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class Brand(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(32), nullable=False)
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def __repr__(self) -> str:
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return f"<Brand {self.id} ({self.name})>"
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class Category(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(32), nullable=False)
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Item = db.relationship("Item", secondary=item_category, lazy="dynamic", back_populates="Category")
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def __repr__(self) -> str:
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return f"<Category {self.id} ({self.name})>"
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class Item(db.Model):
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id = db.Column(db.BigInteger, primary_key=True)
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name = db.Column(db.String(64), nullable=False)
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brand = db.Column(db.ForeignKey('brand.id'), nullable=False)
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description = db.Column(db.Text, nullable=False)
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Category = db.relationship("Category", secondary=item_category, lazy="dynamic", back_populates="Item")
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Bought = db.relationship("Bought", backref='Item', lazy='dynamic')
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PriceChange = db.relationship("PriceChange", backref='Item', lazy='dynamic')
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AmountChange = db.relationship("AmountChange", backref='Item', lazy='dynamic')
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def __repr__(self) -> str:
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return f"<Item {self.id} ({self.name})>"
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class Bought(db.Model):
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user = db.Column(db.ForeignKey('user.id'), primary_key=True)
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item = db.Column(db.ForeignKey('item.id'), primary_key=True)
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date = db.Column(db.Date, primary_key=True)
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amount = db.Column(db.SmallInteger, nullable=False)
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# registered = db.Column(db.Boolean, nullable=False, default=False)
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# paid = db.Column(db.SmallInteger, nullable=False, default=0)
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def __repr__(self) -> str:
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return f"<Bought Object>"
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class PriceChange(db.Model):
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item = db.Column(db.ForeignKey('item.id'), primary_key=True)
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date = db.Column(db.Date, primary_key=True)
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price = db.Column(db.SmallInteger, nullable=False)
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def __repr__(self) -> str:
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return f"<Price_Change {self.item} ({self.date})>"
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class AmountChange(db.Model):
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item = db.Column(db.ForeignKey('item.id'), primary_key=True)
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date = db.Column(db.Date, primary_key=True)
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amount = db.Column(db.SmallInteger, nullable=False, default=1)
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def __repr__(self) -> str:
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return f"<Amount_Change {self.item} ({self.date})>"
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class Receipt(db.Model):
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id = db.Column(db.Numeric(precision=22, scale=0), primary_key=True)
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date = db.Column(db.Date, nullable=False)
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registered = db.Column(db.Boolean, nullable=False, default=False)
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paid = db.Column(db.SmallInteger, nullable=False, default=0)
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def __repr__(self) -> str:
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return f"<Receipt {self.id}>"
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class ItemReceipt(db.Model):
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receipt = db.Column(db.ForeignKey("receipt.id"), primary_key=True)
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item = db.Column(db.ForeignKey("item.id"), primary_key=True)
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amount = db.Column(db.SmallInteger, nullable=False)
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def __repr__(self) -> str:
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return f"<ItemReceipt {self.receipt}: {self.item}>"
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def query_price_per_amount_view():
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p = db.aliased(PriceChange, name="p")
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a = db.aliased(AmountChange, name="a")
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date = db.func.greatest(p.date, a.date).label("date")
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price = (db.func.ceil(p.price.cast(db.Float)/db.func.coalesce(a.amount, 1))/100).label("price")
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select = db.select(p.item.label("item"), date, price)
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select = select.distinct(p.item, date)
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select = select.join(a, p.item==a.item, isouter=True)
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select = select.order_by(p.item, db.desc(db.func.greatest(p.date, a.date)))
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return select
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price_per_amount = create_view("price_per_amount", query_price_per_amount_view(), db.metadata)
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def query_bought_with_prices_view():
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b = db.aliased(Bought, name="b")
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ppa = price_per_amount.alias("ppa")
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select = db.select(b.user.label("user"), b.date.label("date"), b.item.label("item"), b.amount.label("amount"), ppa.c.price.label("price"))
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select = select.distinct(b.user, b.date, b.item)
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select = select.join(ppa, b.item==ppa.c.item)
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select = select.where(ppa.c.date<=b.date)
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select = select.order_by(db.desc(b.user), db.desc(b.date), db.desc(b.item), db.desc(ppa.c.date))
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return select
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bought_with_prices = create_view("bought_with_prices", query_bought_with_prices_view(), db.metadata)
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@login.user_loader
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def load_user(id):
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return User.query.get(int(id)) |