from typing import Optional from sqlmodel import Field, Session, SQLModel, create_engine, select class Team(SQLModel, table=True): id: Optional[int] = Field(default=None, primary_key=True) name: str = Field(index=True) headquarters: str class Hero(SQLModel, table=True): id: Optional[int] = Field(default=None, primary_key=True) name: str = Field(index=True) secret_name: str age: Optional[int] = Field(default=None, index=True) team_id: Optional[int] = Field(default=None, foreign_key="team.id") sqlite_file_name = "database.db" sqlite_url = f"sqlite:///{sqlite_file_name}" engine = create_engine(sqlite_url, echo=True) def create_db_and_tables(): SQLModel.metadata.create_all(engine) def create_heroes(): with Session(engine) as session: team_preventers = Team(name="Preventers", headquarters="Sharp Tower") team_z_force = Team(name="Z-Force", headquarters="Sister Margaret’s Bar") session.add(team_preventers) session.add(team_z_force) session.commit() hero_deadpond = Hero( name="Deadpond", secret_name="Dive Wilson", team_id=team_z_force.id ) hero_rusty_man = Hero( name="Rusty-Man", secret_name="Tommy Sharp", age=48, team_id=team_preventers.id, ) hero_spider_boy = Hero(name="Spider-Boy", secret_name="Pedro Parqueador") session.add(hero_deadpond) session.add(hero_rusty_man) session.add(hero_spider_boy) session.commit() session.refresh(hero_deadpond) session.refresh(hero_rusty_man) session.refresh(hero_spider_boy) print("Created hero:", hero_deadpond) print("Created hero:", hero_rusty_man) print("Created hero:", hero_spider_boy) def select_heroes(): with Session(engine) as session: statement = select(Hero).join(Team).where(Team.name == "Preventers") results = session.exec(statement) for hero in results: print("Preventer Hero:", hero) def main(): create_db_and_tables() create_heroes() select_heroes() if __name__ == "__main__": main()