Sequelize.js 提供对 MySQL，MariaDB，SQLite 和 PostgreSQL 数据库的简单访问，通过映射数据库条目到对象，或者对象到数据库条目。简而言之，就是 ORM（Object-Relational-Mapper）。Sequelize.js 完全是使用 JavaScript 编写，适用于 Node.js 的环境。
Sequelize.js 2.0.0 RC6 发布，此版本更新内容如下：
[BUG] Fixed issue with including by association reference and where
之前几个小时还发布了 Sequelize.js 2.0.0 RC5 ：
[BUG] Fixed issue with subquery creating include.where and a paranoid main model.#2749/#2769
UniqueConstraintErrors will now extend from ValidationError making it possible to catch both with .catch(ValidationError)
[FEATURE] Adds {save: false} for belongsTo relationship setters. user.setOrganization(organization, {save: false}) will then only set the foreign key value, but not trigger a save on user.
[FEATURE] When updating an instance _previousDataValues will now be updated after afterUpdate hooks have been run rather than before allowing you to use changed in afterUpdate
[BUG] Sequelize will no longer fail on a postgres constraint error not defined by Sequelize
[FEATURE] It's now possible to pass an association reference to include. var Owner = Company.belongsTo(User, {as: 'owner'}; Company.findOne({include: [Owner]});
向后兼容改进
When updating an instance _previousDataValues will now be updated after afterUpdate hooks have been run rather than before allowing you to use changed in afterUpdate
软件详情：https://github.com/sequelize/sequelize/releases/tag/v2.0.0-rc6
来自:开源中国社区
