[Rails] Should Flash::add_flash_types be public?

Ruby on Rails Monday, April 10, 2017

While playing around with gem `traceroute` (0.5.0) I noticed that my additional flash types:

# application_controller.rb
# ...
add_flash_types :success
add_flash_types :error
# ...

are "leaking" into public scope of every controller descendent of ApplicationController:

ApplicationController.new.method(:error).source_location
ApplicationController.new.method(:success).source_location

I wonder if add_flash_types should define the new methods as protected, since it might lead into conflicts with actual controller actions.

You can see this "leaking" with the gem or just with this:

ApplicationController.descendants.map { |ctrl| 
  ctrl.action_methods.map { |action| 
    ctrl.name + "#" + action
  }
}.flatten

This is trivial to accomplish - simply change it to:

#...
define_method(type) do
  request.flash[type]
end
protected type
helper_method type
#...

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