this returns undefined inside of getterMethods object

[erikakers]

Used Sequelize CLI generate a new project and using the CLI to create models and migrations and created a Players model:

module.exports = (sequelize, DataTypes) => {
    const Player = sequelize.define('Player', {
        firstName: {
            type: DataTypes.STRING
        },

        lastName: {
            type: DataTypes.STRING
        }
    }, {
        getterMethods: {
            fullName: () => {
                return this.firstName + ' ' + this.lastName;
            }
        },
        classMethods: {
            associate: (models) => {
                // associations can be defined here
            }
        }
    });

    return Player;
};

Trying to create the fullName inside of the returns an error:

Unhandled rejection TypeError: Cannot read property 'firstName' of undefined
    at [object Object].fullName (player.js:68:24)
    at [object Object].Instance.get (/vagrant/api/node_modules/sequelize/lib/instance.js:186:39)
    at [object Object].Instance.get (/vagrant/api/node_modules/sequelize/lib/instance.js:209:31)
    at [object Object].Instance.toJSON (/vagrant/api/node_modules/sequelize/lib/instance.js:1050:15)
    at [object Object].<anonymous> ({player_id}.js:9:34)
    at processImmediate [as _immediateCallback] (timers.js:383:17)

If I do console.log(this); within the getterMethods it always returns undefined. I've tried to few different combinations to get access to the values but I can't get anything to work. What am I missing?

[Joshua-F]

I believe it might be due to you using the new arrow function syntax, which actually changes how this behaves compared to just function(). Try changing () => { to function() {.

Click here for more info on how this behaves differently with arrow functions.

[mickhansen]

Yep, using arrow functions incorrectly.

[erikakers]

Drep, totally overlooked that.

[DiegoRBaquero]

Took me an hour to find this. I wasn't googling right I guess.

Thank you.

[BradlySharpe]

Also took me a while to find this :(

Have found instead of replacing arrow functions with method: function() { return this.id; } you can use

getterMethods: {
    method() {
        return this.id
    },
}

[snickroger]

Wowwwww. Thank you so much.