在终端:rvm gemset使用全局

酿造专用溶液

更好的解决方案

从评论(马克西姆·卢齐克的功劳)来看，我还没有测试过，但似乎是一个更优雅的解决方案:

通过brew安装Ruby后，运行以下命令将链接更新到最新的Ruby安装

一个解决方案

使用brew就足够了。没有必要安装rvm，对我来说，它只是复杂的事情。

通过brew install ruby，您实际上是在安装最新的ruby(目前是v2.4.0)。但是，您的路径首先找到2.0.0。要避免这种情况，只需更改优先级(源)。我通过改变~/来做到这一点。配置及设置:

导出路径= / usr /地方/ bin:美元的道路

在此之后，我发现捆绑器gem仍然使用2.0.0版本。只需重新安装:gem install bundler

如果你在Mac上，使用rvm来安装特定版本的Ruby。参见如何在MacOS Mojave上使用Ruby版本管理器(RVM)安装Ruby

确保你遵循了所有的步骤。这对我很管用。

您可以通过查看下载Ruby指定Ruby的最新版本。

获取最新版本: curl -sSL https://get.rvm.io | bash -s stable——ruby 安装: RVM安装2.2 使用它作为默认值: RVM使用2.2——default

或者运行ruby的最新命令:

rvm install ruby --latest
rvm use 2.2 --default

一种快速将Ruby升级到v2.4+的方法

brew upgrade ruby

or

sudo gem update --system

我推荐rbenv* https://github.com/rbenv/rbenv

*如果这符合你的标准:https://github.com/rbenv/rbenv/wiki/Why-rbenv?:

rbenv does… Provide support for specifying application-specific Ruby versions. Let you change the global Ruby version on a per-user basis. Allow you to override the Ruby version with an environment variable. In contrast with RVM, rbenv does not… Need to be loaded into your shell. Instead, rbenv's shim approach works by adding a directory to your $PATH. Override shell commands like cd or require prompt hacks. That's dangerous and error-prone. Have a configuration file. There's nothing to configure except which version of Ruby you want to use. Install Ruby. You can build and install Ruby yourself, or use ruby-build to automate the process. Manage gemsets. Bundler is a better way to manage application dependencies. If you have projects that are not yet using Bundler you can install the rbenv-gemset plugin. Require changes to Ruby libraries for compatibility. The simplicity of rbenv means as long as it's in your $PATH, nothing else needs to know about it.

安装

安装Homebrew http://brew.sh

然后:

$ brew update
$ brew install rbenv ruby-build

# Add rbenv to bash so that it loads every time you open a terminal
echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
source ~/.bash_profile

$ rbenv install --list
Available versions:
 1.8.5-p113
 1.8.5-p114
 […]
 2.3.1
 2.4.0-dev
 jruby-1.5.6
 […]
$ rbenv install 2.3.1
[…]

设置全局版本:

$ rbenv global 2.3.1
$ ruby -v
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]

如果您没有显示更新的版本，那么

$ rbenv rehash

通过在存储库根目录中添加.ruby-version来设置存储库的本地版本:

$ cd ~/whatevs/projects/new_repo
$ echo "2.3.1" > .ruby-version

对于OS X，请访问此链接。