Rails3.1環境を構築したけどRails2.3系を修正することになった

Ruby Rails

まずサーバの起動方法が異なるところから躓いた

　
そして実行してみた

kenmituo@hoge ~/My Documents/Aptana Studio 3 Workspace/2011
$ ruby script/server mongrel
c:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:55: unin
itialized constant ActiveSupport::Dependencies::Mutex (NameError)

gemのバージョンが新しすぎるから起こる問題らしい。

kenmituo@hoge ~/My Documents/Aptana Studio 3 Workspace/2011
$ gem -v
1.8.24

kenmituo@hoge ~/My Documents/Aptana Studio 3 Workspace/2011
$ gem update --system 1.3.7
Updating rubygems-update
Successfully installed rubygems-update-1.3.7
Installing RubyGems 1.3.7
RubyGems 1.3.7 installed
(だらだら続く)

　
実行してみる

kenmituo@hoge ~/My Documents/Aptana Studio 3 Workspace/2011
$ ruby script/server mongrel
=> Booting Mongrel
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
c:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Depen
dency#version_requirements is deprecated and will be removed on or after August 2010.  Use #requi
rement

　
なんか変なので再確認

$ gem -v
1.3.7
　
$ rails -v
Rails 3.2.9
　
$ gem list rails -l
*** LOCAL GEMS ***
rails (3.2.9, 2.3.5)

ん・・・

config/environment.rb

# Specifies gem version of Rails to use when vendor/rails is not present
RAILS_GEM_VERSION = '2.3.5' unless defined? RAILS_GEM_VERSION

指定しているから大丈夫なはず。

一つ目の問題：競合

結果はconfig/initializers/hoge_init.rbが競合していた。

2つ目の問題：MySQLのバージョン

$ ruby script/server mongrel
=> Booting Mongrel
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
c:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010.  Use #requirement
c:/Ruby187/lib/ruby/gems/1.8/gems/mysql-2.9.0-x86-mingw32/lib/mysql/1.8/mysql_api.so: Incorrect MySQL client library version! This gem was compiled for 6.0.0 but the client library is 4.1.22. (RuntimeError)

4.1.22ではダメです！6.0.0だ！
　
http://www-jp.mysql.com/downloads/connector/c/からzipをダウンロード、「\mysql-connector-c-noinstall-6.0.2-win32\lib\libmysql.dll」を「\ruby187\bin\libmysql.dll」にコピー
　
次のエラーになる

$ ruby script/server mongrel
=> Booting Mongrel
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
c:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010.  Use #requirement
c:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-.3.5/lib/active_record/connection_adapters/mysql_adapter.rb:589:in `real_connect': Can't connect to MySQL server on 'localhost' (10061) (Mysql::Error)


なやんだ結果
config/database.yml

development:
# host: localhost
host: 127.0.0.1

エラーは収まってくれた。