rake db:schema:dump 在 cmd 它没有在数据库文件夹中生成 schema.rb 文件答案

【问题标题】：rake db:schema:dump in cmd it is not generating schema.rb file in database folderrake db:schema:dump 在 cmd 它没有在数据库文件夹中生成 schema.rb 文件
【发布时间】：2012-01-26 03:16:42
【问题描述】：

当我尝试在 cmd 中运行 rake db:schema:dump 时，我是 ruby on rails 的新手，它没有在数据库文件夹中生成 schema.rb 文件

C:\Users\ACK\SITES\simple_cms>rake db:schema:dump --trace ** 调用 db:schema:dump (first_time) ** 调用环境（first_time） ** 执行环境 ** 调用 db:load_config (first_time) ** 调用 rails_env (first_time) ** 执行 rails_env ** 执行 db:load_config rake 中止！无法在第 19 行第 2 列解析 YAML C:/Ruby192/lib/ruby/1.9.1/psych.rb:148:in parse' C:/Ruby192/lib/ruby/1.9.1/psych.rb:148:inparse_stream' C:/Ruby192/lib/ruby/1.9.1/psych.rb:119:in parse' C:/Ruby192/lib/ruby/1.9.1/psych.rb:106:inload' C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/application/configu ration.rb:106:in database_configuration' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_record/railtie .rb:68:inblock (2 级) in ' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/lazy_ load_hooks.rb:36:in instance_eval' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/lazy_ load_hooks.rb:36:inexecute_hook' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/lazy_ load_hooks.rb:43:in block in run_load_hooks' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/lazy_ load_hooks.rb:42:ineach' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/lazy_ load_hooks.rb:42:in run_load_hooks' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_record/base.rb :2190:in' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_record/railtie s/databases.rake:6:in block (2 levels) in <top (required)>' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:incall' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in block in execute' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:ineach' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in execut e' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:inblock in invoke_with_call_chain' C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in mon_synchronize' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:ininvoke _with_call_chain' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:176:in block in invoke_prerequisites' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:174:ineach' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:174:in invoke _prerequisites' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:157:inblock in invoke_with_call_chain' C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in mon_synchronize' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:ininvoke _with_call_chain' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in invoke ' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:116:ininvoke_task' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in block (2 levels) in top_level' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in每个' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in block in top_level' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:instandard_exception_handling' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:88:in top_level' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:66:in 运行中的块' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in standard_exception_handling' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:63:in 运行'C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/bin/rake:33:in `

' C:/Ruby192/bin/rake:19:in load' C:/Ruby192/bin/rake:19:in' 任务：TOP => db:schema:dump => db:load_config

C:\Users\ACK\SITES\simple_cms>

【问题讨论】：

你的database.yml有东西坏了
开发：适配器：mysql2 编码：utf8 重新连接：false 数据库：simple_cms_development 池：5 用户名：simple_cms 密码：12345 主机：localhost
改为更新您的问题文本

标签： schema rake

【解决方案1】：

确保您在 database.yml 文件中的密码是一个字符串，而不是所有数字。例如，321 会拉出错误，b321 会起作用。

至少在我写这篇文章时（4.21.12），不同的程序更新是异步进行的，而且事情可能会中断，因为它们之间的通信方式不同。

【讨论】：