TypeError: Cannot read property 'prototype' of undefined' Redis connections

Question

I am trying to connect to a Redis Azure instance and I'm following the tutorial here Link. However I keep receiving this error

"TypeError: Cannot read property 'prototype' of undefined"

on this line

bluebird.promisifyAll(redis.RedisClient.prototype);

I am using nodeJS on VSCode. I have npm installed redis and bluebird. Any help would be appreciated, thank you!

Answer 1

"TypeError: Cannot read property 'prototype' of undefined"

1. Make sure to remove import response from { 'express' } which might be got imported by default in your action page.

2. You can refer to how proptotype works under promisifyAll

Class property is a property with a function value that has a non-empty .prototype object. Returns the input object. Note that the original methods on the object are not overwritten but new methods are created with the Async-suffix. For example, if you promisifyAll the node.js fs object use fs.statAsync to call the promisified stat method.

Promise.promisifyAll(require("redis"));

//Later on, all redis client instances have promise returning functions:

redisClient.hexistsAsync("myhash", "field").then(function(v) {

}).catch(function(e) {

});

Reference: TypeError: Cannot read property 'prototype' of undefined React Express and Promise.promisifyAll