How do i require a helper file in presenter - rails

Question

I have a rails application. I need to use a helper within a presenter class. I used require 'number_helper' and used a method 'test' from 'number_helper'. It is giving me an error that 'undefined method 'test''.

How do I require a helper file in a presenter class. If I use 'include NumberHelper' it works. what is the wrong with my usage of 'require'

Answer 1

In Rails, Helpers are modules which are directly accessible in immediate view but in order to access them in a controller you need use include directive to specify the module explicitly.

In your case, test is an instance method. If you wish to access it in a class then either you need to include the module as specified above.

BUT if you want to access it using require 'number_helper' then define test as a class method(def self.test) and access it in controller as NumberHelper::test.