Reference Source

Upgrade to v4

Sequelize v4 is the current release and it introduces some breaking changes. Majority of sequelize codebase has been refactored to use ES2015 features. The following guide lists some of the changes to upgrade from v3 to v4.

Changelog

Full Changelog for v4 release.

Breaking Changes

Node

To use new ES2015 features, Sequelize v4 requires at least Node v4 or above.

General

Config / Options

Data Types

Transactions / CLS

Raw Queries

Others