114 lines
5.0 KiB
Python
114 lines
5.0 KiB
Python
from sqlalchemy import Column, Integer, String, Float, Boolean, DateTime, ForeignKey, Table
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import relationship
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from sqlalchemy.sql import func
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from datetime import datetime
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Base = declarative_base()
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# Association table for many-to-many relationship between shopping events and products
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shopping_event_products = Table(
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'shopping_event_products',
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Base.metadata,
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Column('id', Integer, primary_key=True, autoincrement=True), # Artificial primary key
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Column('shopping_event_id', Integer, ForeignKey('shopping_events.id'), nullable=False),
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Column('product_id', Integer, ForeignKey('products.id'), nullable=False),
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Column('amount', Float, nullable=False), # Amount of this product bought in this event
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Column('price', Float, nullable=False) # Price of this product at the time of this shopping event
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)
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class BrandInShop(Base):
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__tablename__ = "brands_in_shops"
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id = Column(Integer, primary_key=True, index=True)
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shop_id = Column(Integer, ForeignKey("shops.id"), nullable=False)
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brand_id = Column(Integer, ForeignKey("brands.id"), nullable=False)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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shop = relationship("Shop", back_populates="brands_in_shop")
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brand = relationship("Brand", back_populates="shops_with_brand")
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class Brand(Base):
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__tablename__ = "brands"
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id = Column(Integer, primary_key=True, index=True)
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name = Column(String, nullable=False, index=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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products = relationship("Product", back_populates="brand")
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shops_with_brand = relationship("BrandInShop", back_populates="brand")
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class GroceryCategory(Base):
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__tablename__ = "grocery_categories"
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id = Column(Integer, primary_key=True, index=True)
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name = Column(String, nullable=False, index=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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groceries = relationship("Grocery", back_populates="category")
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class Grocery(Base):
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__tablename__ = "groceries"
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id = Column(Integer, primary_key=True, index=True)
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name = Column(String, nullable=False, index=True)
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category_id = Column(Integer, ForeignKey("grocery_categories.id"), nullable=False)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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category = relationship("GroceryCategory", back_populates="groceries")
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products = relationship("Product", back_populates="grocery")
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class Product(Base):
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__tablename__ = "products"
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id = Column(Integer, primary_key=True, index=True)
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name = Column(String, nullable=False, index=True)
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grocery_id = Column(Integer, ForeignKey("groceries.id"), nullable=False)
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brand_id = Column(Integer, ForeignKey("brands.id"), nullable=True)
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organic = Column(Boolean, default=False)
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weight = Column(Float, nullable=True) # in grams or kg
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weight_unit = Column(String, default="piece") # "g", "kg", "ml", "l", "piece"
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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grocery = relationship("Grocery", back_populates="products")
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brand = relationship("Brand", back_populates="products")
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shopping_events = relationship("ShoppingEvent", secondary=shopping_event_products, back_populates="products")
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class Shop(Base):
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__tablename__ = "shops"
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id = Column(Integer, primary_key=True, index=True)
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name = Column(String, nullable=False, index=True)
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city = Column(String, nullable=False)
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address = Column(String, nullable=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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shopping_events = relationship("ShoppingEvent", back_populates="shop")
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brands_in_shop = relationship("BrandInShop", back_populates="shop")
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class ShoppingEvent(Base):
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__tablename__ = "shopping_events"
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id = Column(Integer, primary_key=True, index=True)
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shop_id = Column(Integer, ForeignKey("shops.id"), nullable=False)
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date = Column(DateTime(timezone=True), nullable=False, default=datetime.utcnow)
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total_amount = Column(Float, nullable=True) # Total cost of the shopping event
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notes = Column(String, nullable=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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shop = relationship("Shop", back_populates="shopping_events")
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products = relationship("Product", secondary=shopping_event_products, back_populates="shopping_events") |