Bundler 使用错误的 Ruby 版本

Question

当我尝试启动 Rails 服务器时，出现以下错误：

$ bundle exec rails s
Your Ruby version is 2.3.7, but your Gemfile specified ~> 2.3.8

我不明白为什么会发生这种情况，因为我使用 Homebrew 和 rbenv 将 Ruby 设置为 2.3.8。2.3.7是系统的ruby版本。我使用的是 Mac 操作系统 10.14.4。

$ ruby -v
ruby 2.3.8p459 (2018-10-18 revision 65136) [x86_64-darwin18]

$ rbenv version
2.3.8 (set by /Users/ceasar/foo/.ruby-version)

$ which -a ruby
/Users/ceasar/.rbenv/shims/ruby
/usr/local/opt/ruby@2.3/bin/ruby
/usr/local/bin/ruby
/usr/bin/ruby

$ which -a bundle
/Users/ceasar/.rbenv/shims/bundle
/usr/local/bin/bundle

$ /usr/bin/xcodebuild -version
Xcode 10.2
Build version 10E125

$ brew list ruby@2.3
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/erb
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/gem
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/irb
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/rake
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/rdoc
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/ri
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/ruby
/usr/local/Cellar/ruby@2.3/2.3.8_1/include/ruby-2.3.0/ (25 files)
/usr/local/Cellar/ruby@2.3/2.3.8_1/lib/libruby.2.3.0.dylib
/usr/local/Cellar/ruby@2.3/2.3.8_1/lib/pkgconfig/ruby-2.3.pc
/usr/local/Cellar/ruby@2.3/2.3.8_1/lib/ruby/ (1211 files)
/usr/local/Cellar/ruby@2.3/2.3.8_1/lib/ (3 other files)
/usr/local/Cellar/ruby@2.3/2.3.8_1/share/emacs/ (7 files)
/usr/local/Cellar/ruby@2.3/2.3.8_1/share/man/ (4 files)
/usr/local/Cellar/ruby@2.3/2.3.8_1/share/ri/ (13487 files

$ bundle env | head -n 40
## Environment

```
Bundler       2.0.1
  Platforms   ruby, x86_64-darwin-18
Ruby          2.3.8p459 (2018-10-18 revision 65136) [x86_64-darwin18]
  Full Path   /Users/ceasar/.rbenv/versions/2.3.8/bin/ruby
  Config Dir  /Users/ceasar/.rbenv/versions/2.3.8/etc
RubyGems      2.5.2.3
  Gem Home    /Users/ceasar/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0
  Gem Path    /Users/ceasar/.gem/ruby/2.3.0:/Users/ceasar/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0
  User Path   /Users/ceasar/.gem/ruby/2.3.0
  Bin Dir     /Users/ceasar/.rbenv/versions/2.3.8/bin
Tools
  Git         2.19.2
  RVM         not installed
  rbenv       rbenv 1.1.2
  chruby      not installed
```

## Bundler Build Metadata

```
Built At          2019-01-04
Git SHA           d7ad2192f
Released Version  true
```

## Bundler settings

```
build.libv8
  Set for the current user (/Users/ceasar/.bundle/config): "--with-system-v8"
build.mysql2
  Set for the current user (/Users/ceasar/.bundle/config): "--with-mysql-config=/usr/local/Cellar/mysql@5.7/5.7.24/bin/mysql_config"
path
  Set for your local app (/Users/ceasar/Desktop/beacon/.bundle/config): "vendor/bundle"
disable_shared_gems
  Set for your local app (/Users/ceasar/Desktop/beacon/.bundle/config): true
```

我在这里没有看到任何让我认为它应该使用 2.3.7 的内容。

我不知道还能尝试什么。

Bundler 如何决定使用哪个版本的 Ruby，以及如何将其配置为使用 rbenv 或我的自制 Ruby 安装？

Answer 1

尝试使用“rvm”怎么样？

rvm install 2.4.2

此命令将安装另一个版本的 ruby​​，2.4.2

你可以简单地检查你拥有的版本

rvm list。

之后，运行您想要的版本，如下所示，

rvm <version>或者rvm use <version>

希望对你有帮助！