node-redis-async

node-redis-async

Plugin for the redis package. Adds a useful .cmd() method to the redis client.

Installation

npm install --save node-redis-async

# redis is required as a peer dependency
npm install --save redis

Usage

Basic

All commands are replaced by the promise-based .cmd() method.

const redis = require('redis');
require('node-redis-async'); // Load the plugin

const client = redis.createClient(6379, 'redis');

// node-redis-async usage
client.cmd(['set', 'key', 'val'])
	.then(res => console.log(res))
	.catch(err => console.error(err));

// You can still use redis normally
client.set('key', 'val', (err, res) => {
	if (err) {
		console.error(err);
	} else {
		console.log(res);
	}
});

Multi

Simply pass an array with multiple commands and they will be performed atomically. This removes boilerplate code by performing the necessary multi() and exec() calls under the hood.

client.cmd([
	['get', 'key'],
	['set', 'key1', '1'],
	['set', 'key2', '2'],
])
	.then(res => console.log(res)) // => [ 'val', 'OK', 'OK' ]
	.catch(err => console.error(err));

Casting

Redis stores all values as strings. By default, the .cmd() function casts values back to their original types.

client.cmd(['set', 'key', 2]);
client.cmd(['get', 'key'])
	.then(res => console.log(res, typeof res)); // => 2 Number

client.cmd(['set', 'key', true]);
client.cmd(['get', 'key'])
	.then(res => console.log(res, typeof res)); // => true Boolean

client.cmd(['set', 'key', '1a']);
client.cmd(['get', 'key'])
	.then(res => console.log(res, typeof res)); // => 1a String

Disable Casting

To disable casting, use the noCast flag.

client.cmd(['set', 'key', true]);
client.cmd(['get', 'key'], { noCast: true })
	.then(res => console.log(res, typeof res)); // => true String

Caveats

Note that a best guess is made when casting. Example:

// Set a string that is a valid number => returns a number
client.cmd(['set', 'key', '22']);
client.cmd(['get', 'key'])
	.then(res => console.log(res, typeof res)); // => 22 Number
	
// Set a string that is a valid bool => returns a bool
client.cmd(['set', 'key', 'true']);
client.cmd(['get', 'key'])
	.then(res => console.log(res, typeof res)); // => true Boolean