我将gem acts_as_list添加到我的gemfile中。现在，当我运行bundle exec rails s时，服务器崩溃并发出错误：bundler: failed to load command: rails (/Users/dadi/.rbenv/versions/2.3.1/bin/rails)
这是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]
我无法弄清楚为什么会发生这种情况，有人可以帮助我吗？
这是整个控制台输出：
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) $
答案 0 :(得分：2)
这是不可接受的Ruby格式：
acts_as_list :scope => :category, :label
您应该将其作为数组传递
acts_as_list :scope => [:category, :label]