javascript - How to exclude some fields from the document

Question

I have the following simple shema:

 var userSchema = new Schema({
    name : String,
   age: Number,
   _creator: Schema.ObjectId
  });

  var User = mongoose.model('User',userSchema);

What I want to do is create the new document and return to client, but I want to exclude the 'creator' field from one:

app.post('/example.json', function (req, res) {
   var user = new User({name: 'John', age: 45, _creator: 'some ObjectId'});
   user.save(function (err) {
      if (err) throw err;

      res.json(200, {user: user});     // how to exclude the _creator field?
   });
});

At the end I want to send the new created user without _creator field:

{
   name: 'John',
   age: 45
} 

Is it possible to make without extra find request to mongoose?

P.S:It's preferable to make it by

Answer 1

Another way to handle this on the schema level is to override toJSON for the model.

UserSchema.methods.toJSON = function() {
  var obj = this.toObject()
  delete obj.passwordHash
  return obj
}

I came across this question looking for a way to exclude password hash from the json i served to the client, and select: false broke my verifyPassword function because it didn't retrieve the value from the database at all.