from datetime import datetime from sqlalchemy import Column, String, DateTime, Text from sqlalchemy.orm import relationship from app.db.base_class import Base class Category(Base): id = Column(String, primary_key=True, index=True) name = Column(String, index=True) description = Column(Text, nullable=True) created_at = Column(DateTime, default=datetime.utcnow) updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow) # Relationships products = relationship("Product", back_populates="category")