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from sqlmodel import Field, Session, SQLModel, create_engine
class Hero(SQLModel, table=True):
id: int | None = Field(default=None, primary_key=True)
name: str
secret_name: str
age: int | None = None
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():
hero_1 = Hero(name="Deadpond", secret_name="Dive Wilson") # (1)!
hero_2 = Hero(name="Spider-Boy", secret_name="Pedro Parqueador") # (2)!
hero_3 = Hero(name="Rusty-Man", secret_name="Tommy Sharp", age=48) # (3)!
print("Before interacting with the database") # (4)!
print("Hero 1:", hero_1) # (5)!
print("Hero 2:", hero_2) # (6)!
print("Hero 3:", hero_3) # (7)!
with Session(engine) as session: # (8)!
session.add(hero_1) # (9)!
session.add(hero_2) # (10)!
session.add(hero_3) # (11)!
print("After adding to the session") # (12)!
print("Hero 1:", hero_1) # (13)!
print("Hero 2:", hero_2) # (14)!
print("Hero 3:", hero_3) # (15)!
session.commit() # (16)!
print("After committing the session") # (17)!
print("Hero 1:", hero_1) # (18)!
print("Hero 2:", hero_2) # (19)!
print("Hero 3:", hero_3) # (20)!
print("After committing the session, show IDs") # (21)!
print("Hero 1 ID:", hero_1.id) # (22)!
print("Hero 2 ID:", hero_2.id) # (23)!
print("Hero 3 ID:", hero_3.id) # (24)!
print("After committing the session, show names") # (25)!
print("Hero 1 name:", hero_1.name) # (26)!
print("Hero 2 name:", hero_2.name) # (27)!
print("Hero 3 name:", hero_3.name) # (28)!
session.refresh(hero_1) # (29)!
session.refresh(hero_2) # (30)!
session.refresh(hero_3) # (31)!
print("After refreshing the heroes") # (32)!
print("Hero 1:", hero_1) # (33)!
print("Hero 2:", hero_2) # (34)!
print("Hero 3:", hero_3) # (35)!
# (36)!
print("After the session closes") # (37)!
print("Hero 1:", hero_1) # (38)!
print("Hero 2:", hero_2) # (39)!
print("Hero 3:", hero_3) # (40)!
def main():
create_db_and_tables()
create_heroes()
if __name__ == "__main__":
main()
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