所以我已经设置了我的数据库，并尝试为我制作的应用程序生成一些脚手架。我收到这个错误，我有点困惑。有什么建议？谢谢！
rails generate scaffold product title:string description:text image_url:string
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/psych.rb:203:in `parse': (<unknown>): could not find expected ':' while scanning a simple key at line 18 column 3 (Psych::SyntaxError)
from /Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/psych.rb:203:in `parse_stream'
from /Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/psych.rb:151:in `parse'
from /Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/psych.rb:127:in `load'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/application/configuration.rb:115:in `database_configuration'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/railtie.rb:78:in `block (2 levels) in <class:Railtie>'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/lazy_load_hooks.rb:42:in `each'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/base.rb:720:in `<top (required)>'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/railtie.rb:88:in `block in <class:Railtie>'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `run'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `each'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/application.rb:136:in `initialize!'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/Cameron/depot/config/environment.rb:5:in `<top (required)>'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/application.rb:103:in `require'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/application.rb:103:in `require_environment!'
from /Users/Cameron/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:25:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
答案 0 :(得分：4)
这可能是您config/database.yml文件中的问题。错误来自Psych，这是Ruby的YAML解析引擎。我不知道在rails g scaffold期间读取的任何其他YAML文件，我可以通过在我的database.yml文件中引入拼写错误来重现该失败。
您可以将一些online YAML validators粘贴到文件中以帮助调试它。如果找不到问题，请将其添加到上面的问题中。