Mysql2::Error - 用户'root'@'localhost'的访问被拒绝（使用密码：是）

Question

我正在使用培训软件来学习 Rails。我正在使用安装了 Service Pack 1 的 Windows 7 64 位。我已经安装了 MySQL Server 5.6，以及 MySQL Workbench 6.2 CE……如果这有什么不同的话。

对，所以我在培训中构建了一个内容管理系统，并且我在培训软件中的“访问项目”中。我被告知要启动服务器，我这样做了，一切运行良好。但是，在 Firefox 中访问该站点时，我收到了以下错误：

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Mysql2::错误

拒绝用户“root”@“localhost”访问（使用密码：YES）

Rails.root: E:/Programming/Rails/Sites/Simple_CMS 应用程序跟踪 |框架跟踪 |全程跟踪

mysql2-0.3.18-x64 (mingw32) lib/mysql2/client.rb:70:in connect' mysql2-0.3.18-x64 (mingw32) lib/mysql2/client.rb:70:ininitialize' activerecord (4.2.0) lib/active_record/connection_adapters/mysql2_adapter.rb:18:in new' activerecord (4.2.0) lib/active_record/connection_adapters/mysql2_adapter.rb:18:inmysql2_connection' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:436:in new_connection' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:446:incheckout_new_connection' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in acquire_connection' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:349:inblock in checkout' C:/Languages/Ruby/21-x64/lib/ruby/2.1.0/monitor.rb:211:in mon_synchronize' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:348:incheckout' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in block in connection' C:/Languages/Ruby/21-x64/lib/ruby/2.1.0/monitor.rb:211:inmon_synchronize' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in connection' activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:565:inretrieve_connection' activerecord (4.2.0) lib/active_record/connection_handling.rb:113:in retrieve_connection' activerecord (4.2.0) lib/active_record/connection_handling.rb:87:inconnection' activerecord (4.2.0) lib/active_record/migration.rb:384:in connection' activerecord (4.2.0) lib/active_record/migration.rb:371:incall' actionpack (4.2.0) lib/action_dispatch/middleware/callbacks.rb:29:in block in call' activesupport (4.2.0) lib/active_support/callbacks.rb:88:incall' activesupport (4.2.0) lib/active_support/callbacks.rb:88:in _run_callbacks' activesupport (4.2.0) lib/active_support/callbacks.rb:734:in_run_call_callbacks' activesupport (4.2.0) lib/active_support/callbacks.rb:81:in run_callbacks' actionpack (4.2.0) lib/action_dispatch/middleware/callbacks.rb:27:incall' actionpack (4.2.0) lib/action_dispatch/middleware/reloader.rb:73:in call' actionpack (4.2.0) lib/action_dispatch/middleware/remote_ip.rb:78:incall' actionpack (4.2.0) lib/action_dispatch/middleware/debug_exceptions.rb:17:in call' web-console (2.1.1) lib/web_console/middleware.rb:37:incall' actionpack (4.2.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in call' railties (4.2.0) lib/rails/rack/logger.rb:38:incall_app' railties (4.2.0) lib/rails/rack/logger.rb:20:in block in call' activesupport (4.2.0) lib/active_support/tagged_logging.rb:68:inblock in tagged' activesupport (4.2.0) lib/active_support/tagged_logging.rb:26:in tagged' activesupport (4.2.0) lib/active_support/tagged_logging.rb:68:intagged' railties (4.2.0) lib/rails/rack/logger.rb:20:in call' actionpack (4.2.0) lib/action_dispatch/middleware/request_id.rb:21:incall' 机架 (1.6.0) lib/rack/methodoverride.rb:22:in call' rack (1.6.0) lib/rack/runtime.rb:18:incall' activesupport (4.2.0) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in call' rack (1.6.0) lib/rack/lock.rb:17:incall' actionpack (4.2.0) lib/action_dispatch/middleware/static.rb:113:in call' rack (1.6.0) lib/rack/sendfile.rb:113:incall' railties (4.2.0) lib/rails/engine.rb:518:in call' railties (4.2.0) lib/rails/application.rb:164:incall' 机架 (1.6.0) lib/rack/lock.rb:17:in call' rack (1.6.0) lib/rack/content_length.rb:15:incall' 机架 (1.6.0) lib/rack/handler/webrick.rb:89:in service' C:/Languages/Ruby/21-x64/lib/ruby/2.1.0/webrick/httpserver.rb:138:inservice' C:/Languages/Ruby/21-x64/lib/ruby/2.1.0/webrick/httpserver.rb:94:in run' C:/Languages/Ruby/21-x64/lib/ruby/2.1.0/webrick/server.rb:295:inblock in start_thread'

请求

GATEWAY_INTERFACE: "CGI/1.1"
HTTP_ACCEPT: "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
HTTP_ACCEPT_ENCODING: "gzip, deflate"
HTTP_ACCEPT_LANGUAGE: "en-GB,en;q=0.5"
REMOTE_ADDR: "::1"
REMOTE_HOST: "::1"
SERVER_NAME: "localhost"
SERVER_PROTOCOL: "HTTP/1.1"

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好的，所以阅读前面的答案，我似乎遇到了密码错误。起初，我不记得我分配的密码，所以我在这里寻找更改密码的方法。我以为我改变了它，但显然我没有。当我将密码添加到 database.yml 文件时，我仍然得到同样的错误。

沮丧，我查看了另一个类似的论坛帖子，发现我必须使用代码：

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('somepassword')

好吧，那是行不通的。也许我缺乏权限，但我认为 root 访问权限为您提供了管理权限。

Answer 1

您需要按照步骤Here 来重置root 密码。有很多步骤。如果是我，并且没有任何东西无法重做或从 mysql 上的备份中恢复，我只会使用不会忘记的新 root 密码从头开始重新安装。