Quart-Redis

An easy way of setting up a redis connection in quart.

View the docs here.

Requirements

• quart ~= 0.20
• redis >= 5.2.1, < 6

Example

# file: app.py
from quart import Quart
from quart_redis import RedisHandler, get_redis

app = Quart(__name__)
app.config["REDIS_URI"] = "redis://localhost"
# override default connection attempts, set < 0 to disable
# app.config["REDIS_CONN_ATTEMPTS"] = 3
redis_handler = RedisHandler(app)

@app.route("/")
async def index():
    redis = get_redis()

    val = await redis.get("my-key")

    if val is None:
        await redis.set("my-key", "it works!")
        val = await redis.get("my-key")

    return val

Testing

Due to quart_redis using before_serving and after_serving, using the Quart test_client requires the use of test_app. Pytest example shown below:

# file: test.py
import pytest
from app import app

@pytest.fixture(name="my_app", scope="function")
async def _my_app():
    async with app.test_app() as test_app:
        yield test_app

async def test_redis(my_app):
    async with my_app.test_client() as client:
        result = await client.get("/")
        assert result == b"it works!"

Faking Redis

For development and testing, you may not have a running Redis instance. In this case, the fakeredis package may be installed and then used instead of actual redis by setting USE_FAKE_REDIS environment variable to true at runtime.