Question

Is it possible to access instance variable defined in a controller by a method inside my lib folder? Consider the class DoSomething in my lib folder

# inside /lib folder
class DoSomething

    def fun
        puts @some_text
    end

end


class SampleController < ApplicationController

  def index
    @some_text = "ha ha ha"
    DoSomething.new().fun
  end

end  

This does not print anything. I can pass the value to method but I wanna know is it possible to do it without that?

Answer 1

You can’t access it directly, but you can pass it to the initializer for DoSomething:

# inside /lib folder
class DoSomething

  def initialize(some_text)
    @some_text = some_text
  end

  def fun
    puts @some_text
  end
end


class SampleController < ApplicationController

  def index
    @some_text = "ha ha ha"
    DoSomething.new(@some_text).fun
  end
end