rails-api/rails-api — pull request #144 by edowling (2014-07-08 01:59:56+00:00)
Title: Adds self.protected_instance_variables to ActionController::API

This enables compatibility with the decent_exposure gem (and others). It implements the `self.protected_instance_variables` method in `ActionController::Base` (as of Rails 4.1).

This is the cause of the issue referenced [here](https://github.com/rails-api/rails-api/issues/135)