Ruby on Rails 应用程序未在生产模式下启动
在开发模式下一切正常，但是当我尝试在生产模式（RAILS_ENV=生产脚本/服务器）启动我的应用程序时，我收到以下错误：
/opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/conditions.rb:81:in `method_missing': protected method `scope' called for #<Class:0x7f41de524410> (NoMethodError)
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/association_conditions.rb:19:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/association_ordering.rb:27:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/ordering.rb:30:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/or_conditions.rb:28:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1959:in `method_missing_without_paginate'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/will_paginate-2.3.12/lib/will_paginate/finder.rb:170:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/acts_as_commentable-3.0.0/lib/comment_methods.rb:12:in `included'
from .../app/models/comment.rb:2:in `include'
from .../app/models/comment.rb:2
from /opt/ruby1.8/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /opt/ruby1.8/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'...
现在在我看来，acts_as_commentable gem 导致了这种情况。但为什么在开发模式下却运行得很好呢。
Everything works fine in development mode, but when I try to start my app in production mode (RAILS_ENV=production script/server) I get the following error:
/opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/conditions.rb:81:in `method_missing': protected method `scope' called for #<Class:0x7f41de524410> (NoMethodError)
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/association_conditions.rb:19:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/association_ordering.rb:27:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/ordering.rb:30:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/searchlogic-2.4.19/lib/searchlogic/named_scopes/or_conditions.rb:28:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1959:in `method_missing_without_paginate'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/will_paginate-2.3.12/lib/will_paginate/finder.rb:170:in `method_missing'
from /opt/ruby1.8/lib/ruby/gems/1.8/gems/acts_as_commentable-3.0.0/lib/comment_methods.rb:12:in `included'
from .../app/models/comment.rb:2:in `include'
from .../app/models/comment.rb:2
from /opt/ruby1.8/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /opt/ruby1.8/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'...
Now it seems to me it that the acts_as_commentable gem is causing this. But how come, it works fine in development mode.
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评论（2）
在开发模式下，类会根据需要加载。在生产中，它们在 Rails 启动时被缓存。
in development mode classes are loaded as you need them. In production, they're cached when rails starts.
感谢 fl00r 的评论，我发现了错误：
comment.rb 中的第 2 行是
include ActsAsCommentable::Comment。这对我来说有点奇怪，所以我查看了acts_as_commentable gem 的官方文档。这就是问题所在。它应该是acts_as_commentable。一定是从某个地方复制粘贴的。尽管如此，它如何在开发模式下工作仍然是个谜。因为annaswims提到的类缓存？
I have found the error thanks to fl00r's comment:
Line 2 in comment.rb was
include ActsAsCommentable::Comment. That seemed a bit strange to me, so I took a look at the official documentation for the acts_as_commentable gem. That was the problem. It should have beenacts_as_commentableinstead. Must have copy-pasted it from somewhere.Still, the mystery remains how it could have worked in development mode. Because of the class caching mentioned by annaswims?