Mongoose: Find, modify, save

Question

I have a Mongoose User model:

var User = mongoose.model('Users',     mongoose.Schema({         username: 'string',         password: 'string',         rights: 'string'     }) ); 

I want to find one instance of the User model, modify it's properties, and save the changes. This is what I have tried (it's wrong!):

User.find({username: oldUsername}, function (err, user) {     user.username = newUser.username;     user.password = newUser.password;     user.rights = newUser.rights;      user.save(function (err) {         if(err) {             console.error('ERROR!');         }     }); }); 

What is the syntax to find, modify and save an instance of the User model?

Answer 1

The user parameter of your callback is an array with find. Use findOne instead of find when querying for a single instance.

User.findOne({username: oldUsername}, function (err, user) {     user.username = newUser.username;     user.password = newUser.password;     user.rights = newUser.rights;      user.save(function (err) {         if(err) {             console.error('ERROR!');         }     }); }); 

Answer 2

Why not use Model.update? After all you're not using the found user for anything else than to update it's properties:

User.update({username: oldUsername}, {     username: newUser.username,      password: newUser.password,      rights: newUser.rights }, function(err, numberAffected, rawResponse) {    //handle it })