db.py

import os

from sqlmodel import SQLModel

from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
from sqlalchemy.orm import sessionmaker

from dotenv import load_dotenv
# get the database url from the environment variable
load_dotenv("./database/database.env")
DATABASE_URL = os.getenv("DATABASE_URL")

engine = create_async_engine(DATABASE_URL, echo=True, future=True)


# initialize db and create tables if they don't exist
async def init_db():
    async with engine.begin() as conn:
        # await conn.run_sync(SQLModel.metadata.drop_all)
        await conn.run_sync(SQLModel.metadata.create_all)


# create a new session and return it when called
async def get_session() -> AsyncSession:
    async_session = sessionmaker(
        engine, class_=AsyncSession, expire_on_commit=False
    )
    async with async_session() as session:
        yield session