找不到 cache_sweeper 方法答案

【问题标题】：cache_sweeper method not found找不到 cache_sweeper 方法
【发布时间】：2010-11-24 20:56:49
【问题描述】：

我正在将我的 Rails 3 应用程序部署到 Tomcat 6 服务器。我一直在使用warble 将我的项目打包到war 文件中，到目前为止还没有遇到任何问题。我刚刚在我的应用程序中添加了cache_sweeper。当我尝试点击应用程序时，我收到了标准的 500 错误页面。

查看我的日志，我看到了：

org.jruby.rack.RackInitializationException: undefined method `cache_sweeper' for ApplicationController:Class

找不到cache_sweeper方法？这不是 Rails 的一部分吗？

在开发模式下不会发生这种情况，尽管在开发中我使用 MRI ruby 并改用 rails 服务器。

有人有什么想法吗？！

完全错误：

SEVERE: Application Error
org.jruby.rack.RackInitializationException: undefined method `cache_sweeper' for ApplicationController:Class
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/app/controllers/application_controller.rb:239:in `require'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:227:in `load_dependency'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:346:in `require_or_load'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:491:in `load_missing_constant'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:183:in `const_missing'
    from C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/gems/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:181:in `each'
     ... 39 levels...
    from file:/C:/bin/apache-tomcat-6.0.29/webapps/rails3app/WEB-INF/lib/jruby-rack-1.0.3.jar!/vendor/rack-1.2.1/rack/builder.rb:46:in `initialize'
    from <script>:2:in `new'
    from <script>:2

    at org.jruby.rack.DefaultRackApplicationFactory$4.init(DefaultRackApplicationFactory.java:184)
    at org.jruby.rack.DefaultRackApplicationFactory.getApplication(DefaultRackApplicationFactory.java:59)
    at org.jruby.rack.PoolingRackApplicationFactory.getApplication(PoolingRackApplicationFactory.java:94)
    at org.jruby.rack.servlet.DefaultServletDispatcher.process(DefaultServletDispatcher.java:36)
    at org.jruby.rack.RackFilter.doFilter(RackFilter.java:59)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:861)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1584)
    at java.lang.Thread.run(Thread.java:619)

【问题讨论】：

标签： ruby-on-rails-3 jruby tomcat6 jrubyonrails

【解决方案1】：

无论出于何种原因，在使用 jruby/warble 时都必须包含该模块。但是，当使用 MRI 和 rails 服务器时，此步骤不是必需的。

我将此添加到我的ApplicationController 并且它有效：

class ApplicationController < ActionController::Base
  include ActionController::Caching::Sweeping if defined?(JRUBY_VERSION)
  ...
end

【讨论】：