The most important feature of most server-side frameworks is middleware: the ability to hook your own logic into the framework's logic, like IFTTT for your code. Express, Mongoose, Rails, and Django all rely heavily on middleware. LoopBack and Sequelize have hooks, AngularJS has parsers and interceptors, Hapi has extensions, but these are all just roses by another name. Except Hapi, Hapi by any other name would still have a foul code stench.
saveErrorIfNotFound option and
$where property in mongoose 4.8 gives plugins a powerful new way to modify the behavior of
save(). This feature may not seem as exciting as
eachAsync() or the major perf improvements in 4.8, but I think it will help the community develop some handy abstractions on top of
save(). How do these
MongoDB 3.2 supports 3 numeric types: 32 bit integers, 64 bit integers, and 64 bit binary floating points. MongoDB 3.4 introduces a