Question

I would think this is a Ruby difference, but I’m using the same Ruby version 1.8.7. This is related to this post (to answer “why do you need this?”). This code works in 2.2.2

Loading development environment (Rails 2.2.2)
>> module ActionMailer
>> Utils.normalize_new_lines("blah")
>> end

but in 2.3.5 it fails

Loading development environment (Rails 2.3.5)
>> module ActionMailer
>> Utils.normalize_new_lines("blah")
>> end
NoMethodError: undefined method `normalize_new_lines' for ActionMailer::Utils:Module
from (irb):2

What’s new about 2.3.5 that this would fail? The method is there in 2.3.5, so this works

Loading development environment (Rails 2.3.5)
>> include ActionMailer
>> include Utils
>> normalize_new_lines("blah")

I realize this is probably an important Rails difference.

Answer 1

Looks like the code changed from version 2.2 to version 2.3.5

old:

module ActionMailer
  module Utils #:nodoc:
    def normalize_new_lines(text)
      text.to_s.gsub(/\r\n?/, "\n")
    end
    module_function :normalize_new_lines
  end
end

new:

module ActionMailer
  module Utils #:nodoc:
    def normalize_new_lines(text)
      text.to_s.gsub(/\r\n?/, "\n")
    end
  end
end

I guess you could restore the old behavior by calling module_function yourself:

$ script/console
Loading development environment (Rails 2.3.5)
>> module ActionMailer
>> module Utils
>> module_function :normalize_new_lines
>> end
>> Utils.normalize_new_lines("blah")
>> end
=> "blah"
>> 

EDIT: Or better yet just include the module (per Simone)

>> include ActionMailer::Utils