Why does Rails 4.2 + responders keeps telling me to add responders to the Gemfile?

Question

I\'m upgrading a Rails 4.1.8 app (also using rails-api ~> 0.3.1) to 4.2.0.rc2 and would like to retain the respond_with functionality. I\'ve added respon

Answer 1

The following worked for me using rails-api / active_model_serializers 0.8.3:

Remove

include ActionController::MimeResponds
include ActionController::ImplicitRender

Add

include ActionController::RespondWith

See this discussion on github.