How do I set up sequelizejs to use a version column? - postgresql

Question

How do I set up Sequelize to use an auto increment version number?
According to the documentation, all I need is just setting version: true: http://docs.sequelizejs.com/manual/tutorial/models-definition.html#configuration
First attempt:
import Sequelize from "sequelize";
export const sequelize = new Sequelize('my_connection', 'fake-user-name', 'fake-password', {
host: 'localhost',
dialect: 'postgres'
});
export const User = sequelize.define('user', {
id: {type: Sequelize.STRING, primaryKey: true},
name: {type: Sequelize.STRING, allowNull: false}
}, {
underscored: true,
tableName: 'r_users',
version: true // <- here
});
Result: there is no version column created.
Second attempt:
import Sequelize from "sequelize";
export const sequelize = new Sequelize('my_connection', 'fake-user-name', 'fake-password', {
host: 'localhost',
dialect: 'postgres'
});
export const User = sequelize.define('user', {
id: {type: Sequelize.STRING, primaryKey: true},
name: {type: Sequelize.STRING, allowNull: false},
version: { // <- here as well
type: Sequelize.INTEGER,
allowNull: false,
defaultValue: 0
}
}, {
underscored: true,
tableName: 'r_users',
version: true
});
Result: version column is created, but it doesn't auto increment when updating the record (I expect the below would increment version):
User.find({where: {id: 1}}).then(item => {
item.name = "Bob";
item.save();
});
Notes:
I'm using postgres 9.6 and the libraries I'm using are as below:
"sequelize": "^3.30.4"
"pg": "^6.2.3",
"pg-hstore": "^2.3.2",
Question:
Could anyone help me to point out what I have done wrong?
Thanks in advance.