Q.ninvoke replacement in node bluebird

Well, there are several things you can do. The most obvious is surprisingly "nothing".

Mongoose already returns Promises/A+ promises when you don't pass exec its callback, you can just assimilate them:

repo.count = function(entity,query)  { // entity is a mongoose model    return entity.find(query).count().exec(); // return promise};

You can safely use that promise with Bluebird which will assimilate it gladly:

Promise.resolve(repo.count(e, q)); // convert to bluebird promise explicitlysomeOtherBBPromise.then(function(query){    return repo.count(entity, query); // `then`able assimilation});

That said, it can be desirable to have bluebird promises all-over. For this bluebird has a very robust promisifyAll that lets you promisify mongoose at once:

var Promise = require("bluebird");var mongoose = Promise.promisifyAll(require("mongoose"));// everything on mongoose promisified someEntity.saveAsync(); // exists and returns bluebird promise

I come from google and the accepted answer is not I want. I am looking for a general replacement for ninvoke.

It should look something like this.

Q version:

Q.ninvoke(redisClient, "get", "foo")

Bluebird version:

Promise.promisify(redisClient.get, {context: redisClient})("foo")