CODEWITHSUNDEEP
ruby
Jordan Stewart
Jordan Stewart

Reputation: 3395

NoMethodError when trying to access a "nested method" (or def) in the same module

The piece of code below gives me a NoMethodError. I'm a little confused why it gives me an error, and why I can't find anything about nesting methods in modules. Could someone please explain why this isn't working? Can I nest "defs" in modules?

module HowToBasic
  module_function

  def say_id_and_say_name(id)

    # nested method
    def say_id(id)
      p id
    end

    # errors here with `say_id_and_say_name': 
    # undefined method `say_id' for HowToBasic:Module (NoMethodError)
    # from teststuff.rb:24:in `<main>'
    say_id(id)
  end

end

HowToBasic.say_id_and_say_name("99999")

Version: ruby 2.3.1p112

I had a look and couldn't find anything about this:

Upvotes: 1

Views: 294

Answers (1)

djaszczurowski
djaszczurowski

Reputation: 4533

you're missing self keyword in method definition - without it say_id_and_say_name is just an instance method, thus it can't be invoked on Module.

module HowToBasic
  module_function

  def self.say_id(id)
    p id
  end

  def self.say_id_and_say_name(id)    
    say_id(id)
  end    
end

HowToBasic.say_id_and_say_name("99999")

Upvotes: 4

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