list Rails controller instance variables

Question

i was trying to list the instance variables inside a controller but came up with

irb>HomeController.instance_variable_names
=> [\"@visible_actions\", \"@in         


        

Answer 1

The instance variables belong to the instantiated controller object, and are only created when the action method has executed. Try this:

irb>instantiated_controller = HomeController.new
irb>instantiated_controller.index
irb>instantiated_controller.instance_variable_names
=> ["@_status", "@_headers", ...