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 2.0.0RC7 发布，此版本现已提供下载：Sequelize 3.0.0.RC7.zip，主要更新内容如下： [FEATURE] Throw an error if no where clause is given to Model.destroy(). [BUG] Fixed issue with order: sequelize.literal('string') [FEATURE] add clone: true support to .get(). Is needed when using delete on values from a .get() (toJSON(), this.values). (.get() is just a reference to the values for performance reasons when there's no custom getters or includes) [FEATURE] add sequelize.escape(value) convenience method [BUG] Fixes crash with findAll({include: [Model], order: sequelize.literal()}) [FEATURE] Now possible to pass createdAt and updatedAt values to Model.create/Model.bulkCreate when using silent: true (when importing datasets with existing timestamps) [FEATURE] instance.update() using default fields will now automatically also save and validate values provided via beforeUpdate hooks [BUG] Fixed bad SQL when updating a JSON attribute with a different field [BUG] Fixed issue with creating and updating values of a DataTypes.ARRAY(DataTypes.JSON) attribute [BUG] Model.bulkCreate([{}], {returning: true}) will now correctly result in instances with primary key values. [BUG] instance.save() with fields: [] (as a result of .changed() being []) will no result in a noop instead of an empty update query. [BUG] Fixed case where findOrCreate could return [null, true] when given a defaults value that triggered a unique constraint error. 向后兼容改进 instance.update() using default fields will now automatically also save and validate values provided via beforeUpdate hooks Sequelize no longer supports case insensitive mysql enums 更多内容请看更新日志。 Sequelize 2.0.0RC7 发布，基于 Node.js 的 ORM下载地址
