use node-redis with node 8 util.promisify

Question

node -v : 8.1.2

I use redis client node_redis with node 8 util.promisify , no blurbird.

the callback redis.get is ok, but promisify type get error message

Answer 1

You can also use Blue Bird Library plus monkey patching will do the trick for you. For example:

const bluebird = require('bluebird')
const redis = require('redis')
async connectToRedis() {
     // use your url to connect to redis
     const url = '//localhost:6379'
     const client = await redis.createClient({
                url: this.url
            }) 
     client.get = bluebird.promisify(client.get).bind(client);
     return client
   }
// To connect to redis server and getting the key from redis
connectToRedis().then(client => client.get(/* Your Key */)).then(console.log)

Answer 2

changing let get = util.promisify(client.get);

to let get = util.promisify(client.get).bind(client);

solved it for me :)

Answer 3

If you are using node v8 or higher, you can promisify node_redis with util.promisify as in:

const {promisify} = require('util');
const getAsync = promisify(client.get).bind(client); // now getAsync is a promisified version of client.get:

// We expect a value 'foo': 'bar' to be present
// So instead of writing client.get('foo', cb); you have to write:
return getAsync('foo').then(function(res) {
    console.log(res); // => 'bar'
});

or using async await:

async myFunc() {
    const res = await getAsync('foo');
    console.log(res);
}

culled shamelessly from redis official repo