Question

Is it possible to alias an attr_reader method in Ruby? I have a class with a favourites property that I want to alias to favorites for American users. What’s the idiomatic Ruby way to do this?

Answer 1

attr_reader simply generates appropriate instance methods. This:

class Foo
  attr_reader :bar
end

is identical to:

class Foo
  def bar
    @bar
  end
end

therefore, alias_method works as you’d expect it to:

class Foo
  attr_reader :favourites
  alias_method :favorites, :favourites

  # and if you also need to provide writers
  attr_writer :favourites
  alias_method :favorites=, :favourites=
end