Mongoose and promises: how to get an array of query results?
mongodb, mongoose, node.js, promise, q
Solution
Another suggestion would be to use MongoDB's `$in` operator to pass in an array to `find` and get a large set of results efficiently. Each will be a Mongoose object.
var promise = people.find({ _id: { $in: someArrayOfIds }).exec();
promise.then(function(arrayOfPeople) {
// array of people ... do what you want here...
});
This would be far more efficient than making multiple requests, one for each `_id`.
Problem
Using mongoose to query results from the db and Q for promises, but finding it hard to wrap my head around just getting a list of users that's available. Currently I have some something like this: ``` var checkForPerson = function( person ) { people = mongoose.model('Person', Person) return people.findOne({"_id": person }, function(err, doc) { if (err) console.log(err) if (doc !== null) { return doc } else { console.log('no results') } }) } var promises = someArrayOfIds.map(checkForPerson); // this is where I would like to have an array of models var users = Q.all(promises) //this fires off before the people.findOne query above to users is undefined SomeOtherFunction( users ) ``` How would I go about having the queries finish before `SomeOtherFunction` without doing tons of sloppy callbacks?