How do I set up SQLAlchemy with async support?

How do I set up SQLAlchemy with async support?

To set up SQLAlchemy with async support, you'll need to install the asyncpg driver and use the asyncio event loop.

What are the steps to install asyncpg?

You can install asyncpg using pip: pip install asyncpg. Make sure you have Python 3.7 or higher.

Can you show me a basic example of an async query?

Sure! Here's a simple example:

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

DATABASE_URL = 'postgresql+asyncpg://user:password@localhost/dbname'

engine = create_async_engine(DATABASE_URL, echo=True)
AsyncSessionLocal = sessionmaker(bind=engine, class_=AsyncSession)

async def get_data():
    async with AsyncSessionLocal() as session:
        result = await session.execute('SELECT * FROM my_table')
        return result.fetchall()

asyncio.run(get_data())

What if I want to use it with FastAPI?

You can integrate SQLAlchemy with FastAPI by using dependency injection for the database session. Would you like an example?