javascript - Mongoose: populate after query

Question

How to i populate the query result after query in mongoose like this:

users
        .find({name:"doejohn"})
        .skip(3)
        .limit(9)
        .exec((err,user) => {
            user // result
                .populate("tweets")
                .exec(callback)
})
        })

Answer 1

Simply like this :

users.findOne({username:"doejohn"})
        .skip(3)
        .populate("tweets")
        .exec((err,user) => {})

.limit(9) is useless, because you're using .findOne()