MongooseJS 4.2.5 发布，此版本主要是 bug 修复：
fixed; handle setting fields in pre update hooks with exec #3549
upgraded; ESLint #3547 ChristianMurphy
fixed; bluebird unhandled rejections with cast errors and .exec #3543
fixed; min/max validators handling undefined #3539
fixed; standalone mongos connections #3537
fixed; call .toObject() when setting a single nested doc #3535
fixed; single nested docs now have methods #3534
fixed; single nested docs with .create() #3533 #3521 tusbar
docs; deep populate docs #3528
fixed; deep populate schema ref handling #3507
upgraded; mongodb driver -> 2.0.48 for sort overflow issue #3493
docs; clarify default ids for discriminators #3482
fixed; properly support .update(doc) #3221
下载：https://github.com/Automattic/mongoose/archive/4.2.5.zip
Mongoose 是基于nodejs，使用javascript编程，连接mongodb数据库的软件包，使mongodb的文档数据模型变的优雅起来，方便对mongodb文档型数据库的连接和增删改查等常规数据操作。
mongoose是当前使用mean（mongodb express angularjs nodejs）全栈开发必用的连接数据库软件包。
来自:开源中国社区
