from typing import Optional from sqlmodel import Field, SQLModel, create_engine class Team(SQLModel, table=True): id: Optional[int] = Field(default=None, primary_key=True) name: str headquarters: str class Hero(SQLModel, table=True): id: Optional[int] = Field(default=None, primary_key=True) name: str secret_name: str age: Optional[int] = None 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 main(): create_db_and_tables() if __name__ == "__main__": main()