redisgoose v1.1.3

Redisgoose

Use redis and mongoose together as efficiently as possible

I created this package because cachegoose and recachegoose were giving me some trouble

Made for Mongoose v6 and up

Installation

npm i redisgoose

Example Usage

const redisgoose = require('redisgoose');
const mongoose = require('mongoose');

// Redis is installed locally in this case
redisgoose('redis://127.0.0.1:6379');

const Sample = mongoose.model('sample', new mongoose.Schema({ name: String }));

const main = async function () {
    await mongoose.connect('mongodb://127.0.0.1/test');
    console.log('Connected to mongodb');

    // Find a sample with the name test
    // .cache(lifetime, ?key), key should be autogenerated or predefined

    let q = { name: 'test' };
    const r1 = await Sample.findOne(q).cache(500, Sample.makeCacheKey(q));
    console.log(r1);

    if (!r1) {
        // Creates a sample if doesn't exist
        await Sample.create(q);
    }

    const r2 = await Sample.findOne(q).cache(500, Sample.makeCacheKey(q));
    // If r1 is null then r2 will be null due to it being cached, this means it works
    console.log(r2);

    // To clear the cache just use this
    redisgoose.clearCache(Sample.makeCacheKey(q));
};

main();

Example initialisation

const redisgoose = require('redisgoose');
// If redis is installed locally and with default port
redisgoose();

// With redis url
// redis[s]://[[username][:password]@][host][:port][/db-number]
redisgoose('redis://127.0.0.1:6379');

// With host and port explicit
redisgoose({
    host: '127.0.0.1',
    port: '6379'
});

// With a preinitialised redis client
redisgoose(client);
redisgoose({ client: client });

API

This api section is partially defined

This module is equipped with typescript type definitions\ The typescript has full documentation

redisgoose

redisgoose.clearCache(key?)

Clears the cached value for the given key

If no key is provided then all cached values will be uncached

Returns: Promise<void>

Queue

Queue.redisManager

The redis manager initialised with the process

Query.prototype.cache(lifetime, key?)

Indicates the lifetime and may indicate the key This is required to cache a query to Redis This enables cacheResult

lifetime:\ The lifetime in seconds\ Type: number

key:\ The string to use as key (recommended)\ Type: string

Returns: this

Query.prototype.force()

Sets checkCache to false\ This bypasses checking Redis cache and requests MongoDB directly

Returns this

Query.prototype.noSave()

This prevents saving the query result to Redis\ Sets cacheResult to false\ Implemented for convenience/function chaining

Returns this

Query.prototype.setCacheKey(key)

Sets the cache key

The difference with .cache is that this doesn't enable cacheResult\ This can be used if you need to checkCache but not cacheResult

key:\ The string to use as key\ Type: string

Returns: this

Queue.prototype.checkCache

Whether to check Redis cache when executing a query

Type: boolean

Default: true

Queue.prototype.cacheKey

The key to cache the result with\ This will default to a stringification of the query data if no key is provided

Type: string

Default: null

Query.prototype.cacheLifetime

The lifetime for the cached result in Redis memory

Type: number

Default: null

Queue.prototype.cacheResult

Whether to cache the result to Redis when the query is completed

Type: boolean

Default: true

Example key generator

/**
 *
 * @param model A mongoose model
 * @param args The chaining arguments for the key
 *
 */
function makeCacheKey(model, ...args) {
    return `${model.modelName}:${args.join(':')}`
}