Question

94

How to properly deal with promisifyAll in typescript?

rated 0 times [ 101] [ 7] / answers: 1 / hits: 6458 / 8 Years ago, tue, april 12, 2016, 12:00:00

Consider the following code:

import redis = require('redis');  //Has ambient declaration from DT

import bluebird = require('bluebird');  //Has ambient declaration from DT



bluebird.promisifyAll((<any>redis).RedisClient.prototype);

bluebird.promisifyAll((<any>redis).Multi.prototype);



const client = redis.createClient();



client.getAsync('foo').then(function(res) {

    console.log(res);

});

getAsync will error out because it's created on the fly and not defined in any .d.ts file. So what is the proper way to handle this?

Also, even though I have the .d.ts files loaded for redis, I still need to cast redis to any to be used for promisifyAll. Otherwise, it will spill out error:

Property 'RedisClient' does not exist on type 'typeof redis'

Is typing it to any the only easy way to go?

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marcos

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4 Years ago

answered 8 Years ago myrap · Accepted Answer

I'm solving this by declaration merging the setAsync & getAsync methods. I added the following code in my own custom .d.ts file.

declare module redis {



    export interface RedisClient extends NodeJS.EventEmitter {

        setAsync(key:string, value:string): Promise<void>;

        getAsync(key:string): Promise<string>;

    }



}