如何“激活"?特定宝石的不同版本? [英] How do I "activate" a different version of a particular gem?

问题描述

我想在 rails 2.3.10 作为我操作系统的活动"gem 之间切换，以便我可以在命令行中调用它.

I want to switch between rails 2.3.10 as the "active" gem for my OS, so that I can invoke it at the command line.

可以这样做吗?我没有使用 rvm.也许是时候开始了.

Is it possible to do this? I'm not using rvm. Maybe it's time to start.

我尝试了 gem install rails --version=2.3.10，但这只是确保安装了 gem 的版本，它没有放在 /usr/bin 中/rails.

I tried gem install rails --version=2.3.10, but that just makes sure that version of the gem is installed, it doesn't put it in /usr/bin/rails.

(我已经在我的应用程序中使用了 bundler ——但直到现在还不需要在操作系统级别对 gem 进行任何精确控制)

(I do already use bundler for my apps -- but haven't needed any precise control over gems at the OS level until now)

推荐答案

如果你的问题是运行某个版本的二进制文件，那么:

If your problem is to run binaries of a certain version, then:

rails --version # => the latest version
rails _2.3.10_ --version # => Rails 2.3.10

此模式(gem-binary _gem-version_)适用于任何 gem 二进制文件.

This pattern (gem-binary _gem-version_) works for any gem binary.

希望对你有帮助.

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