Ruby 不会安装 Rest-Client

Question

我正在尝试运行 Ruby 带有 rest-client gem 安装的应用程序。我不断收到错误消息：

C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows/root_certs.rb:2:in `require': cannot load such file -- ffi (LoadError)
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows/root_certs.rb:2:in `<top (required)>'
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows.rb:7:in `require_relative'
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows.rb:7:in `<top (required)>'
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient.rb:16:in `require'
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient.rb:16:in `<top (required)>'
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/rest-client.rb:2:in `require'
    from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/rest-client.rb:2:in `<top (required)>'
    from app.rb:6:in `require'
    from app.rb:6:in `<main>'

$ ./start ruby
Installing bundle
Starting server
C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows/root_certs.rb:2:in `require': cannot load such file -- ffi (LoadError)
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows/root_certs.rb:2:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows.rb:7:in `require_relative'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient/windows.rb:7:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient.rb:16:in `require'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/restclient.rb:16:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/rest-client.rb:2:in `require'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0/lib/rest-client.rb:2:in `<top (required)>'
        from app.rb:6:in `require'
        from app.rb:6:in `<main>'

不过我确定 gem 已安装：

rest-client (2.0.0.rc2, 1.8.0)
rest-open-uri (1.0.0)
rest_client (1.8.3)

有谁知道我在安装过程中可能做错了什么？

Answer 1

问题是 FFI 没有安装，这也是我收到错误消息的原因。不幸的是使用

bundle install

没有正确安装，我不得不手动安装 gem（这比预期的安装时间长得多

 gem install ffi

Ruby 不会安装 Rest-Client

Rest-Client will not install for Ruby

ruby

installation

rubygems