Question

我尝试在ubuntu 16.04上this之后设置rails 5.0.0应用程序，当我第一次启动rails server时，它崩溃了以下消息。我是ruby的新手，不知道出了什么问题

/var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/server.rb:8:in <module:Rails>': uninitialized constant Rack (NameError) Did you mean? Rake from /var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/server.rb:7:in <top (required)>' from /var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:138:in require' from /var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:138:in require_command!' from /var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:83:in server' from /var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:49:in run_command!' from /var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands.rb:18:in <top (required)>' from bin/rails:4:in require' from bin/rails:4:in <main>'

这是

的前10行

/var/lib/gems/2.3.0/gems/railties-5.0.0/lib/rails/commands/server.rb

require 'fileutils'
require 'optparse'
require 'action_dispatch'
require 'rails'
require 'rails/dev_caching'

module Rails
  class Server < ::Rack::Server
    class Options
      DEFAULT_PID_PATH = File.expand_path("tmp/pids/server.pid").freeze

Answer 1

您能否在项目路径上尝试这些命令;

bundle update

gem update

Rails未初始化的恒定Rack

1 个答案: