今天在 vps 上部署 huacnlee 的 homeland 时，执行 rake assets:precompile 出错。我是小白，恳求大家的帮助 错误信息：

** Invoke assets:precompile (first_time)
** Execute assets:precompile
/usr/local/rvm/rubies/ruby-1.9.2-p318/bin/ruby /usr/local/rvm/gems/ruby-1.9.2-p318@global/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets --trace
** Invoke assets:precompile:all (first_time)
** Execute assets:precompile:all
** Invoke assets:precompile:primary (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `level' for #<Mongoid::Logger:0x0000001ae86e20>
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongo-1.6.2/lib/mongo/util/logging.rb:7:in `write_logging_startup_message'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongo-1.6.2/lib/mongo/connection.rb:585:in `setup'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongo-1.6.2/lib/mongo/connection.rb:114:in `initialize'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongo-1.6.2/lib/mongo/connection.rb:165:in `new'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongo-1.6.2/lib/mongo/connection.rb:165:in `from_uri'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid/config/database.rb:89:in `master'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid/config/database.rb:22:in `configure'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid/config.rb:317:in `configure_databases'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid/config.rb:120:in `from_hash'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid/config.rb:137:in `load!'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid.rb:145:in `load!'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/mongoid-2.2.0/lib/mongoid/railtie.rb:63:in `block in <class:Railtie>'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `instance_exec'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `run'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/initializable.rb:55:in `block in run_initializers'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `run_initializers'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/application.rb:96:in `initialize!'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
/home/wwwroot/homeland/config/environment.rb:6:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in `require'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in `block in require'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:223:in `block in load_dependency'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:640:in `new_constants_in'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:223:in `load_dependency'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in `require'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/application.rb:83:in `require_environment!'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/railties-3.1.1/lib/rails/application.rb:193:in `block (2 levels) in initialize_tasks'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/actionpack-3.1.1/lib/sprockets/assets.rake:89:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:176:in `block in invoke_prerequisites'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `invoke_prerequisites'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:157:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/actionpack-3.1.1/lib/sprockets/assets.rake:56:in `block (3 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/bin/rake:19:in `load'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/bin/rake:19:in `<main>'
Tasks: TOP => environment
rake aborted!
Command failed with status (1): [/usr/local/rvm/rubies/ruby-1.9.2-p318/bin/...]
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/file_utils.rb:53:in `block in create_shell_runner'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/file_utils.rb:45:in `call'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/file_utils.rb:45:in `sh'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/file_utils_ext.rb:39:in `sh'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/file_utils.rb:80:in `ruby'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/file_utils_ext.rb:39:in `ruby'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/actionpack-3.1.1/lib/sprockets/assets.rake:9:in `ruby_rake_task'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/actionpack-3.1.1/lib/sprockets/assets.rake:17:in `invoke_or_reboot_rake_task'
/usr/local/rvm/gems/ruby-1.9.2-p318/gems/actionpack-3.1.1/lib/sprockets/assets.rake:25:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/bin/rake:19:in `load'
/usr/local/rvm/gems/ruby-1.9.2-p318@global/bin/rake:19:in `<main>'
Tasks: TOP => assets:precompile