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以下是设置。我有一个基本上是简单CMS的网站。这里是路线文件:根URL无效的动作缓存
map.connect ':url', :controller => :pages, :action => :show
map.root :controller => :pages, :action => :show, :url => "/"
页面控制器是这样的:
class PagesController < ApplicationController
before_filter :verify_access, :except => [:show]
# Cache show action if we are not logged in.
caches_action :show, :layout => false, :unless => Proc.new { |controller| controller.logged_in? }
def update
@page = Page.find(params[:id])
respond_to do |format|
expire_action :action => :show, :url => @page.url
所以,当访问者点击 “/” 它映射到:控制器=> “页面,:动作=>” 秀,:url =>“/”。这会在第一次尝试时生成一个缓存版本,然后在那里返回适当的结果。日志文件显示:
Processing PagesController#show (for 127.0.0.1 at 2009-08-02 14:15:01) [GET]
Parameters: {"action"=>"show", "url"=>"/", "controller"=>"pages"}
Cached fragment hit: views/out.local// (0.1ms)
Rendering template within layouts/application
Filter chain halted as [#<ActionController::Filters::AroundFilter:0x23eb03c @identifier=nil, @method=#<Proc:[email protected]/Library/Ruby/Gems/1.8/gems/actionpack-2.3.3/lib/action_controller/caching/actions.rb:64>, @kind=:filter, @options={:only=>#<Set: {"show"}>, :if=>nil, :unless=>#<Proc:[email protected]/Users/askegg/Sites/out/app/controllers/pages_controller.rb:6>}>] did_not_yield.
Completed in 2ms (View: 1, DB: 0) | 200 OK [http://out.local/]
确定 - 迄今为止都很好。当我更新页面时,应该使缓存过期(参见上文)。日志显示:
Page Load (0.2ms) SELECT * FROM "pages" WHERE ("pages"."id" = 3)
Page Load (0.1ms) SELECT "pages".id FROM "pages" WHERE ("pages"."url" = '/' AND "pages".domain_id = 1 AND "pages".id <> 3) LIMIT 1
Expired fragment: views/out.local/index (0.1ms)
Redirected to http://out.local/pages/3
Completed in 9ms (DB: 0) | 302 Found [http://out.local/pages/3]
看到问题了吗? Rails将清除名为“index”的缓存,但将其设置为“/”。当然这会导致缓存不被清除,所以访问者现在正在看到旧版本。
我切换到片段缓存,所以这不再是一个问题,但我仍然怀疑在这里的Rails中的错误。 – askegg 2009-08-04 01:36:26