安装gem但'rails'命令不起作用 [英] gem installed but 'rails' commands don't work

问题描述

当我运行像 rails s 之类的任何rails命令时，出现以下错误：

无法找到差异-lcs-1.1.2在任何源中
尝试运行 bundle install 。

然而，我已经安装了diff-lcs。

bundle show diff-lcs
/opt/local/lib/ruby1.9/gems /1.9.1/gems/diff-lcs-1.1.2

当我执行<$ c时，我也会看到diff-lcs $ c> gem list 命令

我的GEM_HOME是/opt/local/lib/ruby1.9/gems/1.9.1

以下是我的Gemfile的内容：

  source'http： //rubygems.org'
 
 gem'rails'，'3.0.0'
 gem'sqlite3-ruby'，'1.2.5'，：require => 'sqlite3'
 
 group：development do 
 gem'rspec-rails'，'2.0.0'
 end 
 
 group：test do 
 gem'rspec'，'2.0.0'
 gem'webrat'，'0.7.1'
 end 
  

其中rails 的输出是 / usr / bin / rails

解决方案

如果您使用的是Rails 3，请在Rails应用程序的根目录中编辑'Gemfile'

  gem'diff-lcs'
  

然后从您的rails应用程序的根目录运行bundle install。

when I run any rails command like rails s I get the following error:

Could not find diff-lcs-1.1.2 in any of the sources Try running bundle install.

However, I already installed diff-lcs.

bundle show diff-lcs /opt/local/lib/ruby1.9/gems/1.9.1/gems/diff-lcs-1.1.2

I also see diff-lcs when I do a gem list command

My GEM_HOME is /opt/local/lib/ruby1.9/gems/1.9.1

For reference, here's the contents of my Gemfile:

source 'http://rubygems.org'

gem 'rails', '3.0.0'
gem 'sqlite3-ruby', '1.2.5', :require => 'sqlite3'

group :development do
  gem 'rspec-rails', '2.0.0'
end

group :test do
  gem 'rspec', '2.0.0'
  gem 'webrat', '0.7.1'
end

And the output of which rails is /usr/bin/rails

解决方案

If you are using Rails 3, edit 'Gemfile' in the root of your rails app such that it contains

gem 'diff-lcs'

Then run 'bundle install' from the root of your rails app.

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