How to return from the database of users where a certain field is filled in mongoose?

Question

JavaScript

i did like this, but it returns everyone where the timer field is even empty

Answer 1

mongoosejs.com/docs/api.html#query_Query-exists
Isn't it?

// { name: { $exists: true }}
Thing.where('name').exists()
Thing.where('name').exists(true)
Thing.find().exists('name')

// { name: { $exists: false }}
Thing.where('name').exists(false);
Thing.find().exists('name', false);

Answer 2

If I'm not mistaken something like this

comunicate.find({
    timer: {
        $exists: true
    }
}, callback)