Ruby on Rails中出現錯誤渲染錯誤

Question

我正在使用Ruby定製的一個小CMS，該網站正在使用Mongrel運行。 不幸的是我對Ruby一點都不熟悉。該網站的一部分，最近停止工作（不與任何更新或這樣的連接，所以我不能確定是什麼原因）

檢查在軌日誌「production.log」顯示以下內容：

ActionView :: TemplateError（未定義方法名稱爲nil：NilClass） on line＃25 of app/views/static/frontpage.rhtml：22：<％ Tabloid.find（：all，：limit => 4，：order =>'date DESC'）。每個都做 |小報|％> 23：24：<％= link_to tabloid.title，：controller => 'tabloid'，：action =>'show'，： id => tabloid.id％> 25：

<％= tabloid.date.strftime（「％d，％B，％Y」）％> <％= Profile.find（：first， ：conditions => [「user_id =？」，tabloid。 。USER_ID]）名稱％> <％= Profile.find（：第一，：條件=> [ 「USER_ID =？」， tabloid.user_id]）姓％>

26：

<％= RedCloth.new （截斷（tabloid.texto，250））to_html％>

27：<％如果 tabloid.texto.size> 250％> 28：

<％=的link_to 「更多>」， ：控制器=>「小報'，：action =>'show'，：id => tabloid.id％>

app/views/static/frontpage.rhtml:25 
app/views/static/frontpage.rhtml:22:in `each' 
app/views/static/frontpage.rhtml:22 
/usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_view/renderable.rb:39:in 

send' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_view/renderable.rb:39:in 渲染 ' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_view/template.rb:73:in render_template' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_view/base.rb:256:in 渲染' 在/ usr /本地/ RubyGems的/ gems/gems/actionpack-2.2.2/lib/action_view/base.rb：367： _render_with_layout' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_view/base.rb:254:in render' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/base.rb ：1174：在 render_for_file' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/base.rb:896:in render_without_benchmark ' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/benchmarking.rb:51:in render' /usr/local/rubygems/gems/gems/activesupport-2.2.2/lib/active_support/core_ext/benchmark.rb:8:in 實時' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/benchmarking.rb:51:in render' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/base.rb:868:in render_without_benchmark' /usr/local/rubygems/gems/gems/actionpack-2.2.2 /lib/action_controller/benchmarking.rb:51:in render' /usr/local/rubygems/gems/gems/activesupport-2.2.2/lib/active_support/core_ext/benchmark.rb:8:in 實時 ' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/benchmarking.rb:51:in render' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:122:in 派遣' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:132:in dispatch_cgi' /usr/local/rubygems/gems/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:39:in dispatch' /usr/local/rubygems/gems/gems/mongrel-1.1.5/ lib/mongrel/rails.rb：76：在 process' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in 同步' /usr/local/ru bygems/gems/gems/mongrel-1.1.5/lib/mongrel/rails.rb：74：在 process' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel.rb:159:in process_client' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel.rb ：158：在each' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel.rb:158:in process_client ' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel.rb:285:in run' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel.rb:285:in初始化' 的/ usr /本地/的rubygems /寶石/寶石/雜種-1.1.5/lib/mongrel.rb：285：在new' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:282:in 運行' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel/configurator。RB：281：在 each' /usr/local/rubygems/gems/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in 運行」

等 的雜種原木居然還沒有更新，在一段時間。任何問題是什麼問題或我應該繼續挖掘？

Answer 1

Profile.find(:first, :conditions => [ "user_id = ?", tabloid.user_id])查詢返回nil所以他不能在其上執行name