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101 lines
2.7 KiB
Python
101 lines
2.7 KiB
Python
from typing import Optional
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from sqlmodel import Field, Session, SQLModel, create_engine, select
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class Hero(SQLModel, table=True):
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id: Optional[int] = Field(default=None, primary_key=True)
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name: str = Field(index=True)
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secret_name: str
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age: Optional[int] = Field(default=None, index=True)
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sqlite_file_name = "database.db"
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sqlite_url = f"sqlite:///{sqlite_file_name}"
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engine = create_engine(sqlite_url, echo=True)
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def create_db_and_tables():
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SQLModel.metadata.create_all(engine)
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def create_heroes():
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hero_1 = Hero(name="Deadpond", secret_name="Dive Wilson")
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hero_2 = Hero(name="Spider-Boy", secret_name="Pedro Parqueador")
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hero_3 = Hero(name="Rusty-Man", secret_name="Tommy Sharp", age=48)
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hero_4 = Hero(name="Tarantula", secret_name="Natalia Roman-on", age=32)
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hero_5 = Hero(name="Black Lion", secret_name="Trevor Challa", age=35)
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hero_6 = Hero(name="Dr. Weird", secret_name="Steve Weird", age=36)
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hero_7 = Hero(name="Captain North America", secret_name="Esteban Rogelios", age=93)
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with Session(engine) as session:
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session.add(hero_1)
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session.add(hero_2)
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session.add(hero_3)
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session.add(hero_4)
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session.add(hero_5)
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session.add(hero_6)
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session.add(hero_7)
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session.commit()
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def update_heroes():
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with Session(engine) as session:
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statement = select(Hero).where(Hero.name == "Spider-Boy")
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results = session.exec(statement)
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hero_1 = results.one()
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print("Hero 1:", hero_1)
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statement = select(Hero).where(Hero.name == "Captain North America")
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results = session.exec(statement)
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hero_2 = results.one()
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print("Hero 2:", hero_2)
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hero_1.age = 16
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hero_1.name = "Spider-Youngster"
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session.add(hero_1)
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hero_2.name = "Captain North America Except Canada"
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hero_2.age = 110
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session.add(hero_2)
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session.commit()
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session.refresh(hero_1)
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session.refresh(hero_2)
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print("Updated hero 1:", hero_1)
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print("Updated hero 2:", hero_2)
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def delete_heroes():
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with Session(engine) as session:
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statement = select(Hero).where(Hero.name == "Spider-Youngster")
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results = session.exec(statement)
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hero = results.one()
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print("Hero: ", hero)
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session.delete(hero)
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session.commit()
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print("Deleted hero:", hero)
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statement = select(Hero).where(Hero.name == "Spider-Youngster")
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results = session.exec(statement)
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hero = results.first()
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if hero is None:
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print("There's no hero named Spider-Youngster")
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def main():
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create_db_and_tables()
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create_heroes()
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update_heroes()
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delete_heroes()
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if __name__ == "__main__":
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main()
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