How do I query using Mongoose, but then take that document to do other things?

Question

User.findOne({}, function(err, doc){
   //do stuff with "doc" here.
});

That's the way I currently do it. But what if I want to take "doc", and just do stuff.

User.findOne({}, function(err, doc){
   //do stuff with "doc" here.
});
runAnotherFunction(doc.name)
doc...

How do I take "doc" out of the "function" part?

Answer 1

Node is event driven, it's not procedural code like you're probably used to. Before mongoose can finish retrieving a record execution can already be well passed the call the findOne. Anything that needs to be done with the doc should happen in the callback (The "function" part).

Answer 2

you can try "step", https://github.com/creationix/step

This makes it easier to control logic flow.

See this for example:

async nodejs querying and processing results