我一直在升级Rails 2应用到Rails 3.2.13,并且在尝试启用缓存时遇到问题。缓存在Rails 2中工作,我使用的是相同版本的Ruby - 1.8.7。我不确定它是否相关,但我正在OSX上开发。调用expire_fragment引发“使用#url_for,你必须明确包含路由助手”错误
当expire_fragment被调用时,错误从ActionController :: Caching :: Fragments类抛出。 expire_fragment拨打电话时fragment_cache_key其中包含此:
ActiveSupport::Cache.expand_cache_key(key.is_a?(Hash) ? url_for(key).split("://").last : key, :views)
这次调用url_for是提高这个错误
2013-07-10T14:40:50.430137+01:00 FATAL
RuntimeError (In order to use #url_for, you must include routing helpers explicitly. For instance, `include Rails.application.routes.url_helpers):
lib/bio_catalogue/cache_helper.rb:175:in `expire_fragment'
lib/bio_catalogue/cache_helper.rb:181:in `expire_service_index_tag_cloud'
app/observers/annotation_observer.rb:33:in `expire_caches'
app/observers/annotation_observer.rb:12:in `after_create'
app/controllers/annotations_controller.rb:140:in `create_inline'
这是一个延伸的远一点回溯:
freya.2235 actionpack (3.2.13) lib/abstract_controller/url_for.rb:14:in `_routes'
freya.2235 actionpack (3.2.13) lib/action_dispatch/routing/url_for.rb:148:in `url_=
freya.2235 for'
freya.2235 actionpack (3.2.13) lib/action_controller/caching/fragments.rb:53:in `f=
freya.2235 ragment_cache_key'
freya.2235 actionpack (3.2.13) lib/action_controller/caching/fragments.rb:112:in `=
freya.2235 expire_fragment'
freya.2235 lib/bio_catalogue/cache_helper.rb:175:in `expire_fragment'
freya.2235 lib/bio_catalogue/cache_helper.rb:181:in `expire_service_index_tag_clou=
freya.2235 d'
freya.2235 app/observers/annotation_observer.rb:33:in `expire_caches'
freya.2235 app/observers/annotation_observer.rb:12:in `after_create'
freya.2235 activemodel (3.2.13) lib/active_model/observing.rb:231:in `send'
freya.2235 activemodel (3.2.13) lib/active_model/observing.rb:231:in `update'
freya.2235 activerecord (3.2.13) lib/active_record/observer.rb:114:in `_notify_ann=
freya.2235 otation_observer_for_after_create'
自然我试图在调用expire_fragment的类中包含Rails.application.routes.url_helpers,但无法使用,因为错误来自ActionController模块。 ActionController :: Base已经包含了UrlFor模块,所以我的问题是: 为什么包含UrlFor的模块的一个类会引发一个错误,要求url_helpers被包含在应该能够使用url_for的情况下?
我们在将它发送到expire_fragment之前通过查找url_for片段找到了解决方法。例如从 @ controller.expire_fragment(key,options) 到 @ controller.expire_fragment(Rails.application.routes.url_helpers.url_for(key.merge({:only_path => true})),options) – Njall