sequelize-redis

sequelize-redis

A semi-automatic caching wrapper for Sequelize v4 NodeJS framework

Installation

npm install sequelize-redis

requirements

• Sequelize V4
• Redis Client (promisified with bluebird)

Usage

• Init our Sequelize cache manager:

import SequelizeRedis from 'sequelize-redis';
import redis from 'redis';
import bluebird from 'bluebird';

// Let's promisify Redis
bluebird.promisifyAll(redis.RedisClient.prototype);
bluebird.promisifyAll(redis.Multi.prototype);

// Define your redisClient
const redisClient = redis.createClient({ /* Redis configuration comes here */ });

// Let's start
const sequelizeRedis = new SequelizeRedis(redisClient);

• Wrap our the Sequelize original model:

// models.User refers to model of sequelize
const User = sequelizeRedis.getModel(models.User, { ttl: 60 * 60 * 24 });

The second argument of getModel is optional:

Key	Description	Default value
ttl	Defines cache TTL (seconds)	null

• Then we can start use the model wrapper:

const userUUID = '75292c75-4c7a-4a11-92ac-57f929f50e23';
const userCacheKey = `user_${userUUID}`;
// We can use the default sequelize methods by adding suffix of "Cached" 
// for example, findbyPkCached: 
const [user, cacheHit] = await User.findbyPkCached(userCacheKey, userUUID);
// We can also use the non cached methods (original methods)
const user = await User.findbyPk(userUUID);

Results of Cached methods (for ex. findbyPkCached) will be array with following arguments:

• Sequelize response (same as on original method)
• Cache hit indication (true / false)

Supported Methods: find findOne findAll findAndCount findAndCountAll findbyPk all min max sum count

Cache Invalidation

Just use regular Redis API:

redisClient.del('SampleKey');

Contribution

Feel free to contribute and submit issues.

PR

Please make sure that your code is linted and getting build successfully

Thanks

Inspired by rfink/sequelize-redis-cache/

License

MIT (Idan Gozlan)