Bluebird Promisfy.each, with for-loops and if-statements?
As Benjamin said, instead of using for loop, use Promise.each (or .map)
Look on the Bluebird API docs here and search "example of static map:". With map is clearer to understand than docs for each
var Promise = require('bluebird')// promisify the entire mongoose Modelvar Message = Promise.promisifyAll(Models.Message)Promise.each(repliesIDsArray, function(replyID){ return Message.findOneAsync({'_id': req.params.message_id}) .then(function(doc){ // do stuff with 'doc' here. })})From the docs, .each (or .map) takes "an array, or a promise of an array, which contains promises (or a mix of promises and values)", so that means you can use it with array of 100% pure values to kickoff promise chain
Hope it helps!