undefined method respond_to in Rails 5 controller

Question

I\'m upgrading an app from rails 3.something to rails 5. For some reason, I\'m am getting undefindied method respond_to anytime I use that method in any of my controllers.

Answer 1

As per Rails 5 release notes,

Remove respond_to/respond_with placeholder methods, this functionality has been extracted to the responders gem.

Add responders gem to your Gemfile.