flask redis的使用

flask redis

Installation

pip install flask-redis

Or if you must use easy_install:

alias easy_install="pip install $1"
easy_install flask-redis

Configuration Your configuration should be declared within your Flask config. Set the URL of your database like this:

REDIS_URL = "redis://:password@localhost:6379/0"
# or
REDIS_URL = "unix://[:password]@/path/to/socket.sock?db=0"

To create the redis instance within your application

from flask import Flask
from flask.ext.redis import FlaskRedis

app = Flask(__name__)
redis_store = FlaskRedis(app)
or

from flask import Flask
from flask.ext.redis import FlaskRedis

redis_store = FlaskRedis()

def create_app():
    app = Flask(__name__)
    redis_store.init_app(app)
    return app

or perhaps you want to use the old, plain Redis class instead of StrictRedis

from flask import Flask
from flask.ext.redis import FlaskRedis
from redis import StrictRedis

app = Flask(__name__)
redis_store = FlaskRedis(app, strict=False)

or maybe you want to use mockredis to make your unit tests simpler. As of mockredis 2.9.0.10, it does not have the from_url() classmethod that FlaskRedis depends on, so we wrap it and add our own.

from flask import Flask
from flask.ext.redis import FlaskRedis
from mockredis import MockRedis



class MockRedisWrapper(MockRedis):
    '''A wrapper to add the `from_url` classmethod'''
    @classmethod
    def from_url(cls, *args, **kwargs):
        return cls()

def create_app():
    app = Flask(__name__)
    if app.testing:
        redis_store = FlaskRedis.from_custom_provider(MockRedisWrapper)
    else:
        redis_store = FlaskRedis()
    redis_store.init_app(app)
    return app

Usage FlaskRedis proxies attribute access to an underlying Redis connection. So treat it as if it were a regular Redis instance.

from core import redis_store

@app.route('/')
def index():
    return redis_store.get('potato', 'Not Set')

Protip: The redis-py package currently holds the ‘redis’ namespace, so if you are looking to make use of it, your Redis object shouldn’t be named ‘redis’.

For detailed instructions regarding the usage of the client, check the redis-py documentation.