Mongoose doesn't update my document if I have no callback function

Question

This is my model:

var UserSchema = new Schema({
    username: { type: String, unique: true, index: true },
    url: { type: String },
    name: { type: Strin         


        

Answer 1

See the examples in the findOneAndUpdate documentation:

A.findOneAndUpdate(conditions, update, options, callback) // executes
A.findOneAndUpdate(conditions, update, options)  // returns Query
A.findOneAndUpdate(conditions, update, callback) // executes
A.findOneAndUpdate(conditions, update)           // returns Query
A.findOneAndUpdate()                             // returns Query

If you don't provide a callback, it returns a Query object that you must call exec() on to execute the update.