A plugin for Bookshelf that allows defining custom processor functions that transform model attributes.
npm install bookshelf-processor-plugin 
This is a plugin for the Bookshelf Node.js ORM that allows defining custom processor
functions that handle transformation of values whenever they are .set() on a model.
First install the package:
npm install bookshelf-processor-plugin
Then load the plugin using bookshelf.plugin('bookshelf-processor-plugin'). Now you are all set to start defining
custom attribute processors on your models.
For more information check the online
wiki page.