How to return Mongoose results from the find method?

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You’re trying to force a synchronous paradigm. Just does’t work. node.js is single threaded, for the most part — when io is done, the execution context is yielded. Signaling is managed with a callback. What this means is that you either have nested callbacks, named functions, or a flow control library to make things nicer looking.

https://github.com/caolan/async#parallel

async.parallel([
   function(cb){
      users.find({}, cb);
   },
   function(cb){
      articles.find({}, cb);
   }
], function(results){
   // results contains both users and articles
});

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