rails 4のアンインストール

Railsを3.x系にダウングレードするために、いったんRailsをアンインストールすることに

あっさり

gem uninstall rails

でＯＫと思ったが、gemはアンインストール成功メッセージを出すし、gem search -lで見つからないのだが、rails -vを実行するとちゃんと

Rails 4.0.0

とかえってくる。。。

で、もっと調べてみたところ、"gem uninstall rails"ではだめらしく、

gem uninstall railties -v '4.0.0'

とする必要があるらしい。いろんなところに落とし穴があるなと。。。


アンインストールできたので、3.2.14をインストール

~$ rvmsudo gem install rails -v '3.2.14'
Fetching: activesupport-3.2.14.gem (100%)
Fetching: builder-3.0.4.gem (100%)
Fetching: activemodel-3.2.14.gem (100%)
Fetching: rack-1.4.5.gem (100%)
Fetching: rack-cache-1.2.gem (100%)
Fetching: journey-1.0.4.gem (100%)
Fetching: sprockets-2.2.2.gem (100%)
Fetching: actionpack-3.2.14.gem (100%)
Fetching: arel-3.0.2.gem (100%)
Fetching: activerecord-3.2.14.gem (100%)
Fetching: activeresource-3.2.14.gem (100%)
Fetching: actionmailer-3.2.14.gem (100%)
Fetching: rack-ssl-1.3.3.gem (100%)
Fetching: json-1.8.1.gem (100%)
Building native extensions. This could take a while...
Fetching: rdoc-3.12.2.gem (100%)
Depending on your version of ruby, you may need to install ruby rdoc/ri data:

<= 1.8.6 : unsupported
= 1.8.7 : gem install rdoc-data; rdoc-data --install
= 1.9.1 : gem install rdoc-data; rdoc-data --install
>= 1.9.2 : nothing to do! Yay!
Fetching: railties-3.2.14.gem (100%)
Fetching: rails-3.2.14.gem (100%)
Successfully installed activesupport-3.2.14
Successfully installed builder-3.0.4
Successfully installed activemodel-3.2.14
Successfully installed rack-1.4.5
Successfully installed rack-cache-1.2
Successfully installed journey-1.0.4
Successfully installed sprockets-2.2.2
Successfully installed actionpack-3.2.14
Successfully installed arel-3.0.2
Successfully installed activerecord-3.2.14
Successfully installed activeresource-3.2.14
Successfully installed actionmailer-3.2.14
Successfully installed rack-ssl-1.3.3
Successfully installed json-1.8.1
Successfully installed rdoc-3.12.2
Successfully installed railties-3.2.14
Successfully installed rails-3.2.14
17 gems installed
Installing ri documentation for activesupport-3.2.14...
Installing ri documentation for builder-3.0.4...
Installing ri documentation for activemodel-3.2.14...
Installing ri documentation for rack-1.4.5...
Installing ri documentation for rack-cache-1.2...
Installing ri documentation for journey-1.0.4...
Installing ri documentation for sprockets-2.2.2...
Installing ri documentation for actionpack-3.2.14...
Installing ri documentation for arel-3.0.2...
Installing ri documentation for activerecord-3.2.14...
Installing ri documentation for activeresource-3.2.14...
Installing ri documentation for actionmailer-3.2.14...
Installing ri documentation for rack-ssl-1.3.3...
Installing ri documentation for json-1.8.1...
Installing ri documentation for rdoc-3.12.2...
Installing ri documentation for railties-3.2.14...
Installing ri documentation for rails-3.2.14...
Installing RDoc documentation for activesupport-3.2.14...
Installing RDoc documentation for builder-3.0.4...
Installing RDoc documentation for activemodel-3.2.14...
Installing RDoc documentation for rack-1.4.5...
Installing RDoc documentation for rack-cache-1.2...
Installing RDoc documentation for journey-1.0.4...
Installing RDoc documentation for sprockets-2.2.2...
Installing RDoc documentation for actionpack-3.2.14...
Installing RDoc documentation for arel-3.0.2...
Installing RDoc documentation for activerecord-3.2.14...
Installing RDoc documentation for activeresource-3.2.14...
Installing RDoc documentation for actionmailer-3.2.14...
Installing RDoc documentation for rack-ssl-1.3.3...
Installing RDoc documentation for json-1.8.1...
Installing RDoc documentation for rdoc-3.12.2...
Installing RDoc documentation for railties-3.2.14...
Installing RDoc documentation for rails-3.2.14...