無法爲我的Rails應用程序初始化本地服務器

Question

我的Rails應用程序最近一直在嚇壞我。通過像正常一樣運行「ruby script/server」來啓動本地服務器。服務器啓動，但當我嘗試通過「http://localhost:3000/」訪問它時，它會引發500錯誤。這種情況發生在我所有的Rails應用程序上，即使是我現在保持不變幾個月的舊應用程序。以下是完整的跟蹤：

---

/!\ FAILSAFE /!\ 2010-02-17 23:34:46 -0800 
    Status: 500 Internal Server Error 
    uninitialized constant FFI::Platform::CPU 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:440:in `rescue in load_missing_constant' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:436:in `load_missing_constant' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies' 
    /Users/elpizochoi/.gem/ruby/1.9.1/gems/ffi-0.6.2/lib/ffi/platform.rb:50:in `<module:Platform>' 
    /Users/elpizochoi/.gem/ruby/1.9.1/gems/ffi-0.6.2/lib/ffi/platform.rb:32:in `<module:FFI>' 
    /Users/elpizochoi/.gem/ruby/1.9.1/gems/ffi-0.6.2/lib/ffi/platform.rb:29:in `<top (required)>' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /Users/elpizochoi/.gem/ruby/1.9.1/gems/ffi-0.6.2/lib/ffi/ffi.rb:42:in `<top (required)>' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /Users/elpizochoi/.gem/ruby/1.9.1/gems/ffi-0.6.2/lib/ffi.rb:11:in `<top (required)>' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/sqlite3-0.0.8/lib/sqlite3.rb:1:in `<top (required)>' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `block in require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/requires.rb:7:in `block in require_library_or_gem' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/requires.rb:5:in `require_library_or_gem' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/sqlite3_adapter.rb:10:in `sqlite3_connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in `new_connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in `checkout_new_connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in `block (2 levels) in checkout' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `loop' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `block in checkout' 
    /opt/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in `checkout' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in `connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in `retrieve_connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `retrieve_connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in `connection' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:in `cache' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:28:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/string_coercion.rb:25:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/head.rb:9:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/session/cookie_store.rb:93:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/lock.rb:11:in `block in call' 
    <internal:prelude>:8:in `synchronize' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:114:in `block in call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/reloader.rb:34:in `run' 
    /opt/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:108:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/rails/rack/static.rb:31:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in `block in call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `each' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/rails/rack/log_tailer.rb:17:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/content_length.rb:13:in `call' 
    /opt/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/handler/webrick.rb:50:in `service' 
    /opt/local/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' 
    /opt/local/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' 
    /opt/local/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' 

---

配置：我的Ruby 1.9的MacPorts與安裝，和我on Rails的2.3.5運行。 有些事情我一直在玩最近： - 與RVM 搞砸 - 嘗試了家釀，一個MacOSX的包管理系統 - 安裝獨角獸和薄如寶石

任何幫助，將不勝感激！我寧願不必廢棄我的系統並重新安裝一切。

Answer 1

當我收到「未初始化的常量」錯誤時，我通常會丟失一個類或庫，例如，未完成的項目或分支結賬。在你的情況下，FFI :: Platform的路徑/設置可能存在一些問題:: CPU

順便提一句：「不必刪除我的系統並重新安裝所有東西」 - >我使用git來版本化偶爾控制我的開發環境，這樣我就可以在故障開始之前檢查以前的快照。

祝你好運！