Railsアプリを国際化対応させる

Ruby-GetText-Packageをインストール
（エラー画面等のテキストが日本語で表示されるように）

しかし、失敗。（単純にrails2.1に対応してないとか？ gettext1.91はrails2.0.xに対応ってあるし）

ターミナルでgettextをインストール

Macintosh:~ showjin$ sudo gem install gettext
Bulk updating Gem source index for: http://gems.rubyforge.org/
Successfully installed gettext-1.91.0
1 gem installed
Installing ri documentation for gettext-1.91.0...
Installing RDoc documentation for gettext-1.91.0...

config/environment.rbの末尾（endの後に）に次の一行を追加

require 'gettext/rails'

app/controller/application.rb内にある
helper :all # include all helpers, all the timeの後に
init_gettext “任意の文字列”
を追加

class ApplicationController < ActionController::Base
  helper :all # include all helpers, all the time
  init_gettext "任意の文字列"

※WEBrickを再起動する。

がしかし。再起動出来ず。ターミナル上では以下のようなログが表示された。なんでだろう？

=> Booting WEBrick...
/Users/showjin/NetBeansProjects/railsDemoNetbeans/app/controllers/application.rb:6: undefined method `init_gettext' for ApplicationController:Class (NoMethodError)
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:215:in `load_without_new_constant_marking'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:215:in `load_file'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:354:in `new_constants_in'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:214:in `load_file'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:95:in `require_or_load'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:60:in `depend_on'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:456:in `require_dependency'
	from /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/dispatcher.rb:18:in `define_dispatcher_callbacks'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:177:in `call'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:177:in `evaluate_method'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:161:in `call'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in `run'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in `each'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in `send'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:90:in `run'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/callbacks.rb:272:in `run_callbacks'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:483:in `send'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:483:in `prepare_dispatcher'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:151:in `process'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:93:in `send'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:93:in `run'
	from /Users/showjin/NetBeansProjects/railsDemoNetbeans/config/environment.rb:13
	from /opt/local/lib/ruby/vendor_ruby/rubygems/custom_require.rb:27:in `gem_original_require'
	from /opt/local/lib/ruby/vendor_ruby/rubygems/custom_require.rb:27:in `require'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:354:in `new_constants_in'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/servers/webrick.rb:59
	from /opt/local/lib/ruby/vendor_ruby/rubygems/custom_require.rb:27:in `gem_original_require'
	from /opt/local/lib/ruby/vendor_ruby/rubygems/custom_require.rb:27:in `require'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:354:in `new_constants_in'
	from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/dependencies.rb:509:in `require'
	from /opt/local/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/server.rb:39
	from /opt/local/lib/ruby/vendor_ruby/rubygems/custom_require.rb:27:in `gem_original_require'
	from /opt/local/lib/ruby/vendor_ruby/rubygems/custom_require.rb:27:in `require'
	from script/server:3