rails rbenv：rails：找不到命令

I have recently moved from RVM to Rbenv and when attempting to execute rails I am getting an error like the one below

我最近从RVM迁移到Rbenv，当我尝试执行rails时，我收到的错误如下所示

Pauls-Air:~ $ rails
rbenv: rails: command not found

The `rails' command exists in these Ruby versions:
  2.1.2

3 个解决方案

#1

After installing a gem via the command line in a ruby version you have to execute rbenv rehash as described in the docs here and here

在ruby版本中通过命令行安装gem之后，你必须执行rbenv rehash，如此处和此处的文档中所述

For example:

例如：

$ rbenv install 2.2.0
$ gem install bundler
$ rbenv rehash
$ gem install rails
$ rbenv rehash

#2

You need to install Rails for each Ruby version within rbenv. Try running rbenv version, I might expect that 2.1.2 is not the ruby version in use for the current project (local version) or maybe your global version.

您需要在rbenv中为每个Ruby版本安装Rails。尝试运行rbenv版本，我可能期望2.1.2不是当前项目（本地版本）或您的全球版本使用的ruby版本。

#3

I ran into the same issue, but none of these other solutions (or any of the others I found elsewhere) worked. I was about to go back to RVM, so I decided to get rid of rbenv completely and it paved the way to the solution.

我遇到了同样的问题，但这些其他解决方案（或我在别处找到的任何其他解决方案）都没有奏效。我准备回到RVM，所以我决定完全摆脱rbenv，它为解决方案铺平了道路。

Try the following - it worked for me:

尝试以下 - 它对我有用：

uninstalling rbenv, remove all references rbenv in your bash profile, and remove the remaining rbenv file folder and its contents.

卸载rbenv，删除bash配置文件中的所有引用rbenv，并删除剩余的rbenv文件文件夹及其内容。
Reinstall rbenv with homebrew.

用homebrew重新安装rbenv。

Add it back to your bash profile:

将其添加回您的bash配置文件：

export PATH="$HOME/.rbenv/bin:/usr/local/bin:$PATH"
eval "$(rbenv init -)"

Restart the shell:

重启shell：
```
exec $SHELL -l
```
Check the path:

检查路径：
```
echo $PATH
```
Install Rails:

安装Rails：
```
gem install rails
```
rbenv rehash

rbenv rehash

Note: I consulted this for part of this answer: https://www.codementor.io/tips/3732499178/solution-for-rbenv-rails-is-not-currently-installed-on-this-system-to-get-the-latest-version-simply-type

注意：我为此答案的一部分咨询了这个：https：//www.codementor.io/tips/3732499178/solution-for-rbenv-rails-is-not-currently-installed-on-this-system-to-get -the-最新版本 - 只需型

#1