mirror of
https://github.com/PaiGramTeam/sqlmodel.git
synced 2024-11-22 15:37:33 +00:00
102 lines
2.8 KiB
Python
102 lines
2.8 KiB
Python
from typing import Optional
|
|
|
|
from sqlmodel import Field, Session, SQLModel, create_engine, select
|
|
|
|
|
|
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)
|
|
|
|
|
|
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")
|
|
hero_2 = Hero(name="Spider-Boy", secret_name="Pedro Parqueador")
|
|
hero_3 = Hero(name="Rusty-Man", secret_name="Tommy Sharp", age=48)
|
|
hero_4 = Hero(name="Tarantula", secret_name="Natalia Roman-on", age=32)
|
|
hero_5 = Hero(name="Black Lion", secret_name="Trevor Challa", age=35)
|
|
hero_6 = Hero(name="Dr. Weird", secret_name="Steve Weird", age=36)
|
|
hero_7 = Hero(name="Captain North America", secret_name="Esteban Rogelios", age=93)
|
|
|
|
with Session(engine) as session:
|
|
session.add(hero_1)
|
|
session.add(hero_2)
|
|
session.add(hero_3)
|
|
session.add(hero_4)
|
|
session.add(hero_5)
|
|
session.add(hero_6)
|
|
session.add(hero_7)
|
|
|
|
session.commit()
|
|
|
|
|
|
def update_heroes():
|
|
with Session(engine) as session:
|
|
statement = select(Hero).where(Hero.name == "Spider-Boy")
|
|
results = session.exec(statement)
|
|
hero_1 = results.one()
|
|
print("Hero 1:", hero_1)
|
|
|
|
statement = select(Hero).where(Hero.name == "Captain North America")
|
|
results = session.exec(statement)
|
|
hero_2 = results.one()
|
|
print("Hero 2:", hero_2)
|
|
|
|
hero_1.age = 16
|
|
hero_1.name = "Spider-Youngster"
|
|
session.add(hero_1)
|
|
|
|
hero_2.name = "Captain North America Except Canada"
|
|
hero_2.age = 110
|
|
session.add(hero_2)
|
|
|
|
session.commit()
|
|
session.refresh(hero_1)
|
|
session.refresh(hero_2)
|
|
|
|
print("Updated hero 1:", hero_1)
|
|
print("Updated hero 2:", hero_2)
|
|
|
|
|
|
def delete_heroes():
|
|
with Session(engine) as session:
|
|
statement = select(Hero).where(Hero.name == "Spider-Youngster") # (1)
|
|
results = session.exec(statement) # (2)
|
|
hero = results.one() # (3)
|
|
print("Hero: ", hero) # (4)
|
|
|
|
session.delete(hero) # (5)
|
|
session.commit() # (6)
|
|
|
|
print("Deleted hero:", hero) # (7)
|
|
|
|
statement = select(Hero).where(Hero.name == "Spider-Youngster") # (8)
|
|
results = session.exec(statement) # (9)
|
|
hero = results.first() # (10)
|
|
|
|
if hero is None: # (11)
|
|
print("There's no hero named Spider-Youngster") # (12)
|
|
# (13)
|
|
|
|
|
|
def main():
|
|
create_db_and_tables()
|
|
create_heroes()
|
|
update_heroes()
|
|
delete_heroes()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|