如何在Ubuntu 10.10中将Rails 2.3.5更新为rails 3.0.1

Question

recently i installed rails 2.3.5 using apt-get. After installing rails 3.0.1 the version shows on as rails 2.3.5 when i type rails -v command. How to change that? or can i update rails 2.3.5 to 3.0.1? pls help me out

Answer 1

You should NOT use apt to manage your rubies or your gems! (NEVER)

Use RVM to manage your Rubies and your gems : http://rvm.io/

Answer 2

to install Rails 3 use this script..

sudo gem install rails --pre

It's possible to control version of Rails

rails _2.3.8_ --version
rails _3.0.0.rc_ --version

Hope it'll work. For more details https://help.ubuntu.com/community/RubyOnRails#Installing_rails it's a best url

Oh, I got another solution. Try this script, it'll work

sudo gem install -v=3.0.1 rails --include-dependencies

Answer 3

尝试使用gem uninstall rails然后选择要删除的rails gem版本。

Answer 4

您可以按照http://guides.rubyonrails.org/3_0_release_notes.html中给出的升级说明进行操作