Sequelize v 4.0 发布 Node.js 的 ORM

Sequelize v4.0 发布了，Sequelize.js 提供对 mysql” target=”_blank”>MySQL，mariadb” target=”_blank”>MariaDB，sqlite” target=”_blank”>SQLite 和 postgresql” target=”_blank”>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。

更新内容：

changelog：

[FIXED] Pass ResourceLock instead of raw connection in MSSQL disconnect handling
[CHANGED] Remove hookValidate in favor of validate with hooks: true | false.
[REMOVED] Support for referencesKey
[CHANGED] Throw if dialect is not provided to the constructor
[CHANGED] Throw bluebird.AggregateError instead of array from bulkCreate when validation fails
[FIXED] $notIn: [] is now converted to NOT IN (NULL) #4859
[FIXED] Add raw support to instance.get() #5815
[ADDED] Compare deletedAt against current timestamp when using paranoid #5880
[FIXED] BIGINT gets truncated #5176
[FIXED] Trigger afterCreate hook after all nested includes (for hasMany or belongsToMany associations) have been created to be consistent with hasOne.
[REMOVED] Support for pool:false
[REMOVED] Default transaction isolation level #5094
[ADDED] Add logging for mysql warnings, observant of the showWarnings option. #5900
[REMOVED] MariaDB dialect
[FIXED] hasOne now prefer aliases to construct foreign key #5247
[CHANGED] instance.equals now only checks primary keys, instead of all attributes.
[REWRITE] Rewrite model and instance to a single class – instance instanceof Model #5924
[REMOVED] Counter cache plugin

BC breaks:

hookValidate removed in favor of validate with hooks: true | false. validate returns a promise which is rejected if validation fails
Removed support for referencesKey, use a references object
Remove default dialect
When bulkCreate is rejected because of validation failure it throws a bluebird.AggregateErrorinstead of an array. This object is an array-like so length and index access will still work, butinstanceof array will not
$notIn: [] will now match all rows instead of none
(MySQL) BIGINT now gets converted to string when number is too big
Removed support for pool:false, if you still want to use single connection set pool.max to 1
Removed default REPEATABLE_READ transaction isolation, use config option to explicitly set it
Removed MariaDB dialect – this was just a thin wrapper around MySQL, so using dialect: 'mysql' instead should work with no further changes
hasOne now prefer as option to generate foreign key name, otherwise it defaults to source model name
instance.equals now provides reference equality (do two instances refer to the same row, i.e. are their primary key(s) equal). Use instance.get() to get and compare all values.
Instances (database rows) are now instances of the model, instead of being a separate class. This means you can replace User.build() with new User() and sequelize.define with User extends Sequelize.Model. See #5924
The counter cache plugin, and consequently the counterCache option for associations has been removed. The plugin is seeking a new maintainer – You can find the code here