Ruby on rails 在gemfile中添加了'acts_as_list'，rails在运行rails时给出错误：'bundler:failed to load command:rails'

我将gem

作为列表添加到我的gem文件中。现在，当我运行bundle exec rails时，服务器崩溃并给出错误：
bundler:failed to load命令：rails（/Users/dadi/.rbenv/versions/2.3.1/bin/rails）

下面是
product.rb
模型中的第一行

class Product < ActiveRecord::Base
acts_as_list :scope => :category, :label
belongs_to :category
belongs_to :label

has_many :product_items, :dependent => :destroy

 extend FriendlyId
 friendly_id :title, use: [:slugged, :finders]

类产品：类别，：标签
属于：类别
属于：标签
有很多：产品项目，：依赖=>：销毁
扩展友好ID
友好的\u id:title，用法：[：sluged，：finders]

我不明白为什么会这样，能不能请人帮帮我

以下是整个控制台输出：

    hal@hals-iMac page (master) $ bundle exec rails s
Looks like your app's ./bin/rails is a stub that was generated by Bundler.

In Rails 4, your app's bin/ directory contains executables that are versioned
like any other source code, rather than stubs that are generated on demand.

Here's how to upgrade:

  bundle config --delete bin    # Turn off Bundler's stub generator
  rake rails:update:bin         # Use the new Rails 4 executables
  git add bin                   # Add bin/ to source control

You may need to remove bin/ from your .gitignore as well.

When you install a gem whose executable you want to use in your app,
generate it and add it to source control:

  bundle binstubs some-gem-name
  git add bin/new-executable

WARNING: Skipping key "SMTP_ADDRESS". Already set in ENV.
WARNING: Skipping key "SMTP_USER". Already set in ENV.
WARNING: Skipping key "SMTP_PASSWORD". Already set in ENV.
=> Booting WEBrick
=> Rails 4.2.5 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
bundler: failed to load command: rails (/Users/dadi/.rbenv/versions/2.3.1/bin/rails)
SyntaxError: /Users/dadi/Documents/Vefir/stores/page/app/models/product.rb:2: syntax error, unexpected '\n', expecting =>
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:457:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:457:in `block in load_file'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:647:in `new_constants_in'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:456:in `load_file'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:354:in `require_or_load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:494:in `load_missing_constant'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:184:in `const_missing'
  /Users/dadi/Documents/Vefir/stores/page/app/admin/product.rb:1:in `<top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `block in load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:216:in `block in load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/error.rb:41:in `capture'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:216:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:208:in `block in load!'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:208:in `each'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:208:in `load!'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:230:in `routes'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin.rb:79:in `routes'
  /Users/dadi/Documents/Vefir/stores/page/config/routes.rb:20:in `block in <top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:434:in `instance_exec'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:434:in `eval_block'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:412:in `draw'
  /Users/dadi/Documents/Vefir/stores/page/config/routes.rb:1:in `<top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `block in load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in `each'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in `load_paths'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:16:in `reload!'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:26:in `block in updater'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/file_update_checker.rb:75:in `execute'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:27:in `updater'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `instance_exec'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `run'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:55:in `block in run_initializers'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `call'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/initializable.rb:54:in `run_initializers'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application.rb:352:in `initialize!'
  /Users/dadi/Documents/Vefir/stores/page/config/environment.rb:5:in `<top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `require'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `block in require'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `require'
  /Users/dadi/Documents/Vefir/stores/page/config.ru:3:in `block in <main>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
  /Users/dadi/Documents/Vefir/stores/page/config.ru:in `new'
  /Users/dadi/Documents/Vefir/stores/page/config.ru:in `<main>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:208:in `app'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:61:in `app'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:139:in `log_to_stdout'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:78:in `start'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in `block in server'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `tap'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/app_rails_loader.rb:45:in `require'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/app_rails_loader.rb:45:in `block in exec_app_rails'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/app_rails_loader.rb:34:in `loop'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/app_rails_loader.rb:34:in `exec_app_rails'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/cli.rb:5:in `<top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/bin/rails:9:in `require'
  /Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/bin/rails:9:in `<top (required)>'
  /Users/dadi/.rbenv/versions/2.3.1/bin/rails:23:in `load'
  /Users/dadi/.rbenv/versions/2.3.1/bin/rails:23:in `<top (required)>'
hal@hals-iMac page (master) $ 

hal@hals-iMac页面（主版）$bundle exec rails
看起来您的应用程序的./bin/rails是Bundler生成的存根。
在Rails 4中，应用程序的bin/目录包含版本控制的可执行文件
与任何其他源代码一样，而不是按需生成存根。
以下是如何升级：
bundle config--删除bin#关闭Bundler的存根生成器
rake rails:update:bin#使用新的rails 4可执行文件
git add bin#将bin/添加到源代码管理
您可能还需要将bin/从.gitignore中删除。
当您安装要在应用程序中使用其可执行文件的gem时，
生成并将其添加到源代码管理：
我有一个宝石的名字
git add bin/新可执行文件
警告：正在跳过密钥“SMTP\U地址”。已在环境中设置。
警告：正在跳过密钥“SMTP\U用户”。已在环境中设置。
警告：正在跳过密钥“SMTP\U密码”。已在环境中设置。
=>启动WEBrick
=>Rails 4.2.5应用程序在上开始开发http://localhost:3000
=>运行“rails服务器-h”以获得更多启动选项
=>Ctrl-C关闭服务器
退出
绑定器：未能加载命令：rails（/Users/dadi/.rbenv/versions/2.3.1/bin/rails）
语法错误：/Users/dadi/Documents/Vefir/stores/page/app/models/product.rb:2:语法错误，意外'\n'，预期=>
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:457:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:457:in`block in load\u file'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:647:in'new\u constants\u in'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:456:在“加载文件”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:354:在“require\u或\u load”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u-support/dependencies.rb:494:在'load\u-missing\u-constant'中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:184:in'const\u missing'
/Users/dadi/Documents/Vefir/stores/page/app/admin/product.rb:1:in`'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:268:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:268:in'block in load'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:240:在“加载\u依赖项”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:268:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5b18bff/lib/active_admin/application.rb:216:在“加载中的块”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5b18bff/lib/active_admin/error.rb:41:在“捕获”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5b18bff/lib/active_admin/application.rb:216:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:208:在“加载中的块”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin/application.rb:208:在'each'中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5b18bff/lib/active_admin/application.rb:208:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5b18bff/lib/active_admin/application.rb:230:在“路由”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/activeadmin-0a5a15b88bff/lib/active_admin.rb:79:在“路由”中
/Users/dadi/Documents/Vefir/stores/page/config/routes.rb:20:in'block in'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-4.2.5/lib/action\u dispatch/routing/route\u set.rb:434:in'instance\u exec'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-4.2.5/lib/action\u dispatch/routing/route\u set.rb:434:在“eval\u block”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-4.2.5/lib/action\u dispatch/routing/route\u set.rb:412:in'draw'
/Users/dadi/Documents/Vefir/stores/page/config/routes.rb:1:in`'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:268:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:268:in'block in load'
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:240:在“加载\u依赖项”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.5/lib/active\u support/dependencies.rb:268:在“加载”中
/Users/dadi/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.5/lib/rails/application
acts_as_list :scope => :category, :label

acts_as_list :scope => [:category, :label]