我在OS X 10.10.3上安装了：
自制软件,命令行工具,然后使用rbenv安装 ruby：
自制软件,命令行工具,然后使用rbenv安装 ruby：
ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14] Rails 4.2.2
当我创建一个新的应用程序(使用默认的sqlite数据库)并尝试运行它时,它说：
=> Booting WEBrick => Rails 4.2.2 application starting in development on http://localhost:3000 => Run `rails server -h` for more startup options => Ctrl-C to shutdown server [2015-06-18 23:11:30] INFO WEBrick 1.3.1 [2015-06-18 23:11:30] INFO ruby 2.2.2 (2015-04-13) [x86_64-darwin14] [2015-06-18 23:11:30] INFO WEBrick::HTTPServer#start: pid=41860 port=3000
但在浏览器中我看到：
500 Internal Server Error If you are the administrator of this website,then please read this web application's log file and/or the web server's log file to find out what went wrong.
日志文件：
Started GET "/" for ::1 at 2015-06-18 23:11:48 +0300 **ArgumentError (wrong number of arguments (2 for 1)):** actionpack (4.2.2) lib/action_dispatch/http/request.rb:338:in `parse_query' rack (1.6.3) lib/rack/request.rb:191:in `GET' actionpack (4.2.2) lib/action_dispatch/http/request.rb:300:in `GET' actionpack (4.2.2) lib/action_dispatch/http/parameters.rb:14:in `parameters' actionpack (4.2.2) lib/action_dispatch/http/filter_parameters.rb:37:in `filtered_parameters' actionpack (4.2.2) lib/action_controller/Metal/instrumentation.rb:22:in `process_action' actionpack (4.2.2) lib/action_controller/Metal/params_wrapper.rb:250:in `process_action' activerecord (4.2.2) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (4.2.2) lib/abstract_controller/base.rb:137:in `process' actionview (4.2.2) lib/action_view/rendering.rb:30:in `process' actionpack (4.2.2) lib/action_controller/Metal.rb:196:in `dispatch' actionpack (4.2.2) lib/action_controller/Metal/rack_delegation.rb:13:in `dispatch' actionpack (4.2.2) lib/action_controller/Metal.rb:237:in `block in action' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call' rack (1.6.3) lib/rack/etag.rb:24:in `call' rack (1.6.3) lib/rack/conditionalget.rb:25:in `call' rack (1.6.3) lib/rack/head.rb:13:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call' rack (1.6.3) lib/rack/session/abstract/id.rb:225:in `context' rack (1.6.3) lib/rack/session/abstract/id.rb:220:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call' activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call' activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call' activerecord (4.2.2) lib/active_record/migration.rb:378:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call' activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks' activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks' activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' web-console (2.1.3) lib/web_console/middleware.rb:37:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app' railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged' activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged' activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged' railties (4.2.2) lib/rails/rack/logger.rb:20:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/request_id.rb:21:in `call' rack (1.6.3) lib/rack/methodoverride.rb:22:in `call' rack (1.6.3) lib/rack/runtime.rb:18:in `call' activesupport (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call' rack (1.6.3) lib/rack/lock.rb:17:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call' rack (1.6.3) lib/rack/sendfile.rb:113:in `call' railties (4.2.2) lib/rails/engine.rb:518:in `call' railties (4.2.2) lib/rails/application.rb:164:in `call' rack (1.6.3) lib/rack/lock.rb:17:in `call' rack (1.6.3) lib/rack/content_length.rb:15:in `call' rack (1.6.3) lib/rack/handler/webrick.rb:88:in `service' /Users/smi/.rbenv/versions/2.2.2/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service' /Users/smi/.rbenv/versions/2.2.2/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run' /Users/smi/.rbenv/versions/2.2.2/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread' Rendered /Users/smi/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/actionpack-4.2.2/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (22.3ms)