Ruby on rails 3 不能'；t分析7号线的YAML-炼油厂CMS/Rails问题

请有人帮我了解出了什么问题，以及我将来如何查找/调试这些东西。我已经在Rails中建立了一个精炼CMS应用程序，进行了开发，并将其上传到Heroku，本地和远程副本都运行良好。大约一个月后，我返回本地副本进行处理，但无法加载。我不明白为什么，因为一切都没有改变。我尝试从heroku中删除本地副本并再次克隆，但同样的问题仍然存在。当我尝试在本地创建rails服务器来运行应用程序时，错误代码如下

我希望您能帮助我解决这个错误，也许将来也能帮助我发现/避免这些问题

 /home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:148:in `parse': couldn't parse YAML at line 7 column 0 (Psych::SyntaxError)
from /home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:148:in `parse_stream'
from /home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:119:in `parse'
from /home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:106:in `load'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_record/base.rb:1868:in `object_from_yaml'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_record/attribute_methods/read.rb:129:in `unserialize_attribute'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_record/attribute_methods/read.rb:112:in `_read_attribute'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_record/attribute_methods/read.rb:101:in `read_attribute'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_record/base.rb:1525:in `[]'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:158:in `value'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:61:in `block in to_cache'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:58:in `collect'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:58:in `to_cache'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:73:in `rewrite_cache'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:36:in `ensure_cache_exists!'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:44:in `cache_read'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:109:in `get'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery_setting.rb:95:in `find_or_set'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-images-1.0.9/lib/refinerycms-images.rb:33:in `block (2 levels) in <class:Engine>'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/dragonfly-0.9.8/lib/dragonfly/configurable.rb:35:in `configure'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/dragonfly-0.9.8/lib/dragonfly/configurable.rb:42:in `configure_with'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-images-1.0.9/lib/refinerycms-images.rb:24:in `block in <class:Engine>'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:25:in `instance_exec'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:25:in `run'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:50:in `block in run_initializers'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:49:in `each'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:49:in `run_initializers'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/application.rb:134:in `initialize!'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/application.rb:77:in `method_missing'
from /home/adam/web/beloved/config/environment.rb:5:in `<top (required)>'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active_support/dependencies.rb:239:in `require'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active_support/dependencies.rb:239:in `block in require'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active_support/dependencies.rb:225:in `block in load_dependency'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active_support/dependencies.rb:593:in `new_constants_in'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active_support/dependencies.rb:225:in `load_dependency'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active_support/dependencies.rb:239:in `require'
from /home/adam/web/beloved/config.ru:3:in `block in <main>'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:46:in `instance_eval'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:46:in `initialize'
from /home/adam/web/beloved/config.ru:1:in `new'
from /home/adam/web/beloved/config.ru:1:in `<main>'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:35:in `eval'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:35:in `parse_file'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/server.rb:162:in `app'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/server.rb:253:in `wrapped_app'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/server.rb:204:in `start'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/commands/server.rb:65:in `start'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/commands.rb:30:in `block in <top (required)>'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/commands.rb:27:in `tap'
from /home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

/home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:148:“解析”中：无法解析第7行第0列的YAML（psych:：SyntaxError）
from/home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:148:in'parse_stream'
from/home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:119:in'parse'
from/home/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/psych.rb:106:in'load'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_record/base.rb:1868:in'object_from_yaml'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active\u record/attribute\u methods/read.rb:129:in'unserialize\u attribute'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active\u record/attribute\u methods/read.rb:112:in`\u read\u attribute'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active\u record/attribute\u methods/read.rb:101:in'read\u attribute'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activerecord-3.0.11/lib/active_-record/base.rb:1525:in`[]
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:158:in'value'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:61:in‘block in to_cache’
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:58:in'collect'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:58:in'to\u cache'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:73:在“重写缓存”中
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:36:“确保缓存存在！”
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:44:in'cache\u read'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:109:in'get'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-settings-1.0.9/app/models/refinery\u setting.rb:95:在“查找或设置”中
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-images-1.0.9/lib/refinerycms-images.rb:33:in“block（2级）in”
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/dragonfly-0.9.8/lib/dragonfly/configurable.rb:35:in'configurate'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/dragonfly-0.9.8/lib/dragonfly/configurable.rb:42:in'configure_with'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/refinerycms-images-1.0.9/lib/refinerycms-images.rb:24:in'block in'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:25:in'instance_exec'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:25:in'run'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:50:in`block in run_initializers'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:49:in'each'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/initializable.rb:49:in'run_initializers'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/application.rb:134:in'initialize！'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/railties-3.0.11/lib/rails/application.rb:77:in'method_missing'
from/home/adam/web/downed/config/environment.rb:5:in`'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active\u-support/dependencies.rb:239:in'require'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active\u support/dependencies.rb:239:in'block in require'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active\u-support/dependencies.rb:225:in'block-in-load\u-dependencity'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active\u-support/dependencies.rb:593:in'new\u-constants\u-in'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active\u-support/dependencies.rb:225:in'load\u-dependency'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/activesupport-3.0.11/lib/active\u-support/dependencies.rb:239:in'require'
from/home/adam/web/downed/config.ru:3:in'block in'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:46:in'instance_eval'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:46:in'initialize'
from/home/adam/web/downed/config.ru:1:in'new'
from/home/adam/web/downed/config.ru:1:in`'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:35:in'eval'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/builder.rb:35:in'parse_file'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/server.rb:162:in'app'
from/home/adam/.rvm/gems/ruby-1.9.2-p290@beloved2/gems/rack-1.2.4/lib/rack/server.rb：
require 'yaml'
YAML::ENGINE.yamler = 'syck'