Mak*_*dis 28 ruby caching ruby-on-rails cache-expiration
我一直在尝试使用rails的缓存功能,但我无法使一些缓存片段过期,尽管它们似乎已过期.使用rails教程网站中指出的"俄罗斯娃娃缓存",我正在使用此配置
<% cache "all_available_releases" do %>
<% @releases.each do |release| %>
<% cache(release) do %>
<html code with>
<%ruby code @release.name blah blah blah%>
<%end%>
<%end%>
<%end%>
我使用release_controller.rb控制器中的外部缓存到期,我使用expire_fragment("all_available_releases")来使片段到期.我在控制器的每个更新或删除或添加条目的方法中使用它.
这是WEBrick的日志,虽然expire片段已经注册,但5行之后读取并使用过期片段,而不应该.此示例是在销毁调用之后.
Processing by ReleasesController#destroy as HTML
Parameters: {"authenticity_token"=>"***/***/********************+********=", "id"=>"2"}
Release Load (0.1ms) SELECT "releases".* FROM "releases" WHERE "releases"."id" = ? LIMIT 1 [["id", "2"]]
(0.1ms) begin transaction
SQL (2.0ms) DELETE FROM "releases" WHERE "releases"."id" = ? [["id", 2]]
(148.0ms) commit transaction
Expire fragment views/all_available_releases (0.1ms)
Redirected to http://127.0.0.1:3000/releases
Completed 302 Found in 180ms (ActiveRecord: 150.2ms)
Started GET "/releases" for 127.0.0.1 at 2013-07-03 13:09:51 +0300
Processing by ReleasesController#index as HTML
Read fragment views/all_available_releases/41cb0a928326986f35f41c52bb3d8352 (0.1ms)
Rendered releases/index.html.erb within layouts/application (0.6ms)
Completed 200 OK in 5ms (Views: 4.0ms | ActiveRecord: 0.0ms)
我甚至尝试过使用Rails.cache.delete("all_available_releases")它也没用.
如果我从我的html.erb中删除<%cache "all_available_releases"%>(和一个<%end%>),缓存工作正常,并在任何时候到期.
小智 60
我认为问题是,当你在你看来缓存片段缓存摘要被添加到缓存键(视图/ all_available_releases/41cb0a928326986f35f41c52bb3d8352),但expire_fragment未使用摘要(视图/ all_available_releases).
如果skip_digest: true在视图中添加缓存调用,则应阻止使用摘要.
<% cache "all_available_releases", skip_digest: true do %>
<% @releases.each do |release| %>
<% cache(release) do %>
<html code with>
<%ruby code @release.name blah blah blah%>
<%end%>
<%end%>
<%end%>
缓存摘要仅用于自动缓存过期.如果您需要手动使缓存密钥到期,则无法使用缓存摘要.