[英]'rails server' returns error with mysql 5.7.13 on osx elcapitan
我是Ruby的新手，也是编程的新手。 我已按照互联网和设置导轨应用程序上的说明进行操作。 它第一次工作，但是后来当我重新打开它并尝试运行“ rails server”时，它不起作用，并返回以下错误。 如果有人帮助我，我会很高兴，我已经在互联网上搜索了5个小时。 谢谢。
我正在使用ruby 2.3.1p112 rails 5.0 mysql 5.7.13 $ rails server
=>引导彪马
=>在http：// localhost：3000上开始开发的Rails 5.0.0应用程序
=>运行rails server -h获得更多启动选项
/Users/bruce/sea/config/routes.rb:6:in''：未定义
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``加载块''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中的块”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“重新加载！”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“更新程序中的块”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'执行'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中的块中
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“块（2个级别）”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中的块
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“应用”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'开始'中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:90：在“服务器中的块”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:85：在“点击”中
from /Users/bruce/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0/lib
/rails/commands/commands_tasks.rb:85：在“服务器”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
来自/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，您错误地拥有root 。 尝试将其更改为root_url 。 在ruby中，如果在任何位置都找不到任何内容，则不会显示作为基类的mainObject的方法错误。
希望这对您有所帮助。
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