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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, Team).where(Hero.team_id == Team.id)
results = session.exec(statement)
for hero, team in results:
print("Hero:", hero, "Team:", team)
def main():
create_db_and_tables()
create_heroes()
select_heroes()
if __name__ == "__main__":
main()
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