Mysql2:：用户的错误访问被拒绝'；根'@'；本地主机'；（使用密码：是）

我想运行一个rake db:migrate，但是migrated被中止，我看到这个错误：

rake aborted!
Mysql2::Error: Access denied for user 'root'@'localhost' (using password: YES)
/home/marketa/.rvm/gems/ruby-2.2.1/gems/mysql2-0.3.20/lib/mysql2/client.rb:70:in `connect'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/mysql2-0.3.20/lib/mysql2/client.rb:70:in `initialize'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/mysql2_adapter.rb:18:in `new'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/mysql2_adapter.rb:18:in `mysql2_connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/connection_handling.rb:87:in `connection'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/migration.rb:913:in `initialize'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/migration.rb:820:in `new'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/migration.rb:820:in `up'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/migration.rb:798:in `migrate'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/tasks/database_tasks.rb:137:in `migrate'
/home/marketa/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/railties/databases.rake:44:in `block (2 levels) in <top (required)>'
/home/marketa/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `eval'
/home/marketa/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

我的database.yml文件如下所示：

default: &default
  adapter: mysql2
  pool: 5
  timeout: 5000
  host: localhost
  username: root
  password: hazzy93

development:
  <<: *default
  database: db/dev.mysql2

test:
  <<: *default
  database: db/test.mysql2

production:
  <<: *default
  database: db/production.mysql2

default: &default
  adapter: mysql2
  host: 127.0.0.1
  port: 3306
  username: root
  password: hazzy93

development:
  <<: *default
  database: development

test:
  <<: *default
  database: test

production:
  <<: *default
  database: production

default:&default
适配器：mysql2
游泳池：5
超时：5000
主机：本地主机
用户名：root
密码：hazzy93
发展：
您需要更正您的database.yml
应该是这样的：

default: &default
  adapter: mysql2
  pool: 5
  timeout: 5000
  host: localhost
  username: root
  password: hazzy93

development:
  <<: *default
  database: db/dev.mysql2

test:
  <<: *default
  database: db/test.mysql2

production:
  <<: *default
  database: db/production.mysql2

default: &default
  adapter: mysql2
  host: 127.0.0.1
  port: 3306
  username: root
  password: hazzy93

development:
  <<: *default
  database: development

test:
  <<: *default
  database: test

production:
  <<: *default
  database: production

default:&default
适配器：mysql2
主持人：127.0.0.1
港口：3306
用户名：root
密码：hazzy93
发展：
您需要更正您的database.yml
应该是这样的：

default: &default
  adapter: mysql2
  pool: 5
  timeout: 5000
  host: localhost
  username: root
  password: hazzy93

development:
  <<: *default
  database: db/dev.mysql2

test:
  <<: *default
  database: db/test.mysql2

production:
  <<: *default
  database: db/production.mysql2

default: &default
  adapter: mysql2
  host: 127.0.0.1
  port: 3306
  username: root
  password: hazzy93

development:
  <<: *default
  database: development

test:
  <<: *default
  database: test

production:
  <<: *default
  database: production

default:&default
适配器：mysql2
主持人：127.0.0.1
港口：3306
用户名：root
密码：hazzy93
发展：
试试这个

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: development
  pool: 5
  username: root
  password: hazzy93
  host: localhost


test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: test
  pool: 5
  username: root
  password: hazzy93
  host: localhost

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: production
  pool: 5
  username: root
  password: hazzy93
  host: localhost

试试这个

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: development
  pool: 5
  username: root
  password: hazzy93
  host: localhost


test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: test
  pool: 5
  username: root
  password: hazzy93
  host: localhost

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: production
  pool: 5
  username: root
  password: hazzy93
  host: localhost

您是否能够使用这些凭据从下一行或其他工具连接到此数据库？请更新您的数据库。“数据库：“dev””而不是“database:db/dev.mysql2”您是否能够使用这些凭据从下一行或其他工具连接到此数据库？请更新您的数据库数据库：“dev”“and not”database:db/dev.mysql2“not working:/i仍然有相同的错误您的用户名和密码防御正确吗？not working:/i仍然有相同的错误您的用户名和密码防御正确吗？仍然没有工作：/i您确定您的用户名和密码正确吗？仍然没有工作：/i您确定您的用户名和密码吗密码正确吗？