How to return only specific attributes when using Sequelize Create method

With a quick read through the docs, it seems attributes is only mentioned within queries like:

Model.findAll({
  attributes: { exclude: ['baz'] }
});

(http://docs.sequelizejs.com/manual/tutorial/querying.html#attributes)

If you want to exclude password with create, you could do something like:

let user = await User.create({
    firstName: req.body.firstName,
    lastName: req.body.lastName,
    email: req.body.email,
    password: req.body.password
}, {
    fields: ['firstName', 'lastName', 'email']
});

(http://docs.sequelizejs.com/manual/tutorial/instances.html#creating-persistent-instances)

I see in the document, you can't exclude attributes when you create a model. Only exclude when you find a model.

I suggest:

async create(req, res) 
{
try {
    let user = await User.create({
        firstName: req.body.firstName,
        lastName: req.body.lastName,
        email: req.body.email,
        password: req.body.password
    });
    delete user["password"];//delete field password
    console.log("USER: ", user);

    res.status(201).send(user.toJSON());
}
catch (error) {
    res.status(500).send(error)
};
}

Try overloading Sequelize Model class with your desired functionality. For example, run following code once during application bootstrap:

import {Model} from 'sequelize';

const toJSON = Model.prototype.toJSON;

Model.prototype.toJSON = function ({attributes = []} = {}) {
    const obj = toJSON.call(this);

    if (!attributes.length) {
      return obj;
    }

    return attributes.reduce((result, attribute) => {
      result[attribute] = obj[attribute];

      return result;
    }, {});
  };

After that, you can use your code as usual, but with an attributes option:

User.toJSON({attributes: ['name', 'etc...']}).