[英]'rails server' returns error with mysql 5.7.13 on osx elcapitan
我是Ruby的新手，也是編程的新手。 我已按照互聯網和設置導軌應用程序上的說明進行操作。 它第一次工作，但是后來當我重新打開它並嘗試運行“ rails server”時，它不起作用，並返回以下錯誤。 如果有人幫助我，我會很高興，我已經在互聯網上搜索了5個小時。 謝謝。
我正在使用ruby 2.3.1p112 rails 5.0 mysql 5.7.13 $ rails server
=>引導彪馬
=>在http：// localhost：3000上開始開發的Rails 5.0.0應用程序
=>運行rails server -h獲得更多啟動選項
/Users/bruce/sea/config/routes.rb:6:in''：未定義
main：Object的方法“ root”（NoMethodError）
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/activesupport-
5.0.0 / lib / active_support / dependencies.rb：287：在`load'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/activesupport-
5.0.0 / lib / active_support / dependencies.rb：287：在``加載塊''中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/activesupport-
5.0.0 / lib / active_support / dependencies.rb：259：在'load_dependency'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/activesupport-
5.0.0 / lib / active_support / dependencies.rb：287：在`load'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:40:in在“ load_paths中的塊”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:40:in`each'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:40：在`load_paths'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:16：在“重新加載！”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:26:in在“更新程序中的塊”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/activesupport-
5.0.0 / lib / active_support / file_update_checker.rb：77：在'執行'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:27：在`updater'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/routes_reloader.rb:7：在execute_if_updated中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application/finisher.rb:119:in在'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/initializable.rb:30:in`instance_exec'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/initializable.rb:30：在`run'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/initializable.rb:55:in在run_initializers中的塊中
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:228:in tsort_each中的'block'
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:350：在each_strongly_connected_component中的“塊（2個級別）”中
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:431：在`each_strongly_connected_component_from'中
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:349:in each_strongly_connected_component中的塊
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:347：在`each'中
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:347:in`call'
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:347：在`each_strongly_connected_component'中
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:226：在`tsort_each'中
from /Users/bruce/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0
/tsort.rb:205：在`tsort_each'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/initializable.rb:54：在`run_initializers'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/application.rb:352：在“初始化！”中
from /Users/bruce/sea/config/environment.rb:5:in `<top (required)>'
from /Users/bruce/sea/config.ru:3:in `require_relative'
from /Users/bruce/sea/config.ru:3:in `block in <main>'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/builder.rb:55:in`instance_eval'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/builder.rb:55：在'初始化'中
from /Users/bruce/sea/config.ru:in `new'
from /Users/bruce/sea/config.ru:in `<main>'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/builder.rb:49：在`eval'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/builder.rb:49：在`new_from_string'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/builder.rb:40：在`parse_file'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/server.rb:318：在build_app_and_options_from_config中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/server.rb:218:in'app'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/server.rb:59：在“應用”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/rack-2.0.1/lib
/rack/server.rb:353：在'wrapped_app'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/server.rb:124:in`log_to_stdout'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/server.rb:77：在'開始'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:90：在“服務器中的塊”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:85：在“點擊”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:85：在“服務器”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:49：在`run_command！'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands.rb:18:in''
from /Users/bruce/sea/bin/rails:9:in `require'
from /Users/bruce/sea/bin/rails:9:in `<top (required)>'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/lib
/spring/client/rails.rb:28:in`load'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/lib
/spring/client/rails.rb:28:in`call'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/lib
/spring/client/command.rb:7:in`call'
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/lib
/spring/client.rb:30：在`run'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/bin
/ spring：49：in在''
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/lib
/spring/binstub.rb:11：在`load'中
來自/Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/spring-1.7.2/lib
/spring/binstub.rb:11:in''
from /Users/bruce/sea/bin/spring:13:in `require'
from /Users/bruce/sea/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'`enter
from bin/rails:3:in `<main>'
好像在您的route.rb文件中，您錯誤地擁有root 。 嘗試將其更改為root_url 。 在ruby中，如果在任何位置都找不到任何內容，則不會顯示作為基類的mainObject的方法錯誤。
希望這對您有所幫助。
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