耙db：migrate问题 -

Question

我无法为Ruby on Rails安装我的MySQL数据库。设置完数据库并确保config/database.yml文件匹配后，我正在运行下面的错误消息。

U:\Rails\alpha>rake db:migrate --trace 
(in U:/Rails/alpha) 
** Invoke db:migrate (first_time) 
** Invoke environment (first_time) 
** Execute environment 
** Execute db:migrate 
rake aborted! 
Access denied for user 'admin'@'207-237-91-100.c3-0.avec-ubr13.nyr-avec.n 
y.cable.rcn.com' (using password: YES) 
C:/Ruby187/lib/ruby/gems/1.8/gems/mysql2-0.2.6-x86-mingw32/lib/mysql2/client.rb: 
37:in `connect' 
C:/Ruby187/lib/ruby/gems/1.8/gems/mysql2-0.2.6-x86-mingw32/lib/mysql2/client.rb: 
37:in `initialize' 
C:/Ruby187/lib/ruby/gems/1.8/gems/mysql2-0.2.6-x86-mingw32/lib/active_record/con 
nection_adapters/mysql2_adapter.rb:14:in `new' 
C:/Ruby187/lib/ruby/gems/1.8/gems/mysql2-0.2.6-x86-mingw32/lib/active_record/con 
nection_adapters/mysql2_adapter.rb:14:in `mysql2_connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:230:in `send' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:230:in `new_connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:238:in `checkout_new_connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:194:in `checkout' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:190:in `loop' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:190:in `checkout' 
C:/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:189:in `checkout' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:96:in `connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_pool.rb:318:in `retrieve_connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_specification.rb:97:in `retrieve_connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/connectio 
n_adapters/abstract/connection_specification.rb:89:in `connection' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/migration 
.rb:486:in `initialize' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/migration 
.rb:433:in `new' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/migration 
.rb:433:in `up' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/migration 
.rb:415:in `migrate' 
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-3.0.1/lib/active_record/railties/ 
databases.rake:142 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_cal 
l_chain' 
C:/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_cal 
l_chain' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_excep 
tion_handling' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_excep 
tion_handling' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run' 
C:/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 
C:/Ruby187/bin/rake:19:in `load' 
C:/Ruby187/bin/rake:19 

我查了一下15+次的密码，它是正确的，据我可以告诉。

database.yml文件：

development: 
    adapter: mysql2 
    encoding: utf8 
    reconnect: false 
    database: dbname 
    pool: 5 
    username: admin 
    password: pwhere 
    host: sql.domain.com 

感谢

Answer 1

测试此方法的一种方法是从rails所在的机器的命令行连接到mysql。类似于

mysql -u admin -ppwhere -h sql.domain.com 

您可能会发现无法以这种方式连接。如果是这样，你可能有一个GRANT问题，这可能是由于在GRANT中指定了错误的主机。例如，如果DB和rails驻留在同一台机器上，mysql可能会认为您从“localhost”连接，而不是导轨盒的DNS名称（反之亦然）。

在您可能只需要管理用户访问授予的一切开始：

GRANT ALL ON *.* to 'admin'@'whereever_rails_lives' IDENTIFIED BY 'pwhere' 

mysql grant syntax

诀窍是经常得到“whereever_rails_lives的权利。

Answer 2

你的权限是不正确的。这是一个蹩脚的错误，因为它确实意味着两件事。 1）你有错误的密码/用户名组合;另外，你不能连接到MySQL，这可能严重意味着连接到一个宝石问题，安装问题。 Mysql会变得挑剔！

从你的问题，我收集你对这一切都很新。我所建议的不是担心连接到MySQL，而是从sqlite开始。您不需要全文搜索和lite不提供的其他功能！

所以，让我们开始使用sqlite3。怎么样？

这是少工作。只需制作一个Rails应用程序，然后完成。然后，当你需要mysql数据库的功能时，你可以真正知道在熟悉Rails和调试方面的错误。