Ruby on rails 如何清除Rails文件缓存？

我在Ubuntu 14.04上运行Rails 4.2.7。我编写了以下方法来帮助缓存一些数据（防止对我的PostGres 9.5数据库的点击）

清除缓存并允许缓存方法正常启动的正确方法是什么

编辑：我对迪帕克的建议也有同样的错误，但这里是他的答案的输出

rails@mymachine:~/myproject$ rails console
Loading development environment (Rails 4.2.7.1)
2.3.0 :001 > Rails.cache.clear
 => ["/home/rails/myproject/tmp/cache/assets"] 
2.3.0 :002 > quit

编辑2：这是我的config/environments.production.rb文件。这是一个生产环境

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # Code is not reloaded between requests.
  config.cache_classes = true

  # Eager load code on boot. This eager loads most of Rails and
  # your application in memory, allowing both threaded web servers
  # and those relying on copy on write to perform better.
  # Rake tasks automatically ignore this option for performance.
  config.eager_load = true

  # Full error reports are disabled and caching is turned on.
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Enable Rack::Cache to put a simple HTTP cache in front of your application
  # Add `rack-cache` to your Gemfile before enabling this.
  # For large-scale production use, consider using a caching reverse proxy like
  # NGINX, varnish or squid.
  # config.action_dispatch.rack_cache = true

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?

  # Compress JavaScripts and CSS.
  config.assets.js_compressor = :uglifier
  # config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.assets.compile = false

  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
  # yet still be able to expire them through the digest params.
  config.assets.digest = true

  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb

  # Specifies the header that your server uses for sending files.
  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
  # config.force_ssl = true

  # Use the lowest log level to ensure availability of diagnostic information
  # when problems arise.
  config.log_level = :debug

  # Prepend all log lines with the following tags.
  # config.log_tags = [ :subdomain, :uuid ]

  # Use a different logger for distributed setups.
  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)

  # Use a different cache store in production.
  # config.cache_store = :mem_cache_store

  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
  # config.action_controller.asset_host = 'http://assets.example.com'

  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
  # the I18n.default_locale when a translation cannot be found).
  config.i18n.fallbacks = true

  # Send deprecation notices to registered listeners.
  config.active_support.deprecation = :notify

  # Use default logging formatter so that PID and timestamp are not suppressed.
  config.log_formatter = ::Logger::Formatter.new

  # Do not dump schema after migrations.
  config.active_record.dump_schema_after_migration = false

  config.serve_static_assets = true
  config.assets.compile = true
end

---

在控制台中运行以下命令，而不是

rake tmp:cache:clear

Rails.cache.clear

这将从正在使用的任何缓存存储中清除缓存

config.cache_store = :file_store
# or
config.cache_store = :mem_cache_store

---

您的应用程序似乎需要路径

tmp/cache/001/000/

才能存在。而且，正如您在中所看到的： ，任务

rake tmp:cache:clear

从

tmp/cache

中删除了所有内容，包括

001/000

。我想一个快速的解决方案是在清除缓存后，通过

mkdir-ptmp/cache/001/000/

在项目根目录中手动创建该路径

您可以通过

rails g task cache

向应用程序中添加自定义任务，并编写如下内容来实现自动化：

namespace :cache do
  task :clear do
    FileUtils.rm_rf(Dir['tmp/cache/[^.]*'])
    `mkdir -p tmp/cache/001/000/`
  end
end

---

然后，您可以调用自定义的

rake缓存：清除
，并确保所需的路径存在。
一切都取决于缓存的存储位置。检查配置文件并找到：config.cache_store，然后根据您的设置进行清理我的应用程序中没有这样的设置。在我的config/environments/proudtion.rb文件中，有一行被注释掉了，“#config.cache_store=：mem_cache_store”Deepak已经回答了您的问题，您可以尝试将
iso
变量设置为
integer
值吗？您在谈论什么iso变量？根据我对numBar的注释，我没有“config.cache_store”文件设置。然而，我编辑了我的qeustion以显示您的建议。在运行编辑中详细说明的命令后，我仍然会得到“nota directory@rb_file_s_rename”。请您也从development.rb或production.rb发布设置。当然，编辑了我的问题以包含config/enviornmetns/produciton.rb文件（这是一个生产环境）！！！！警告：
Rails.cache.clear
不只是清除Rails缓存键。如果您的缓存是redis，并且您也在运行sidekiq，那么请与所有计划的作业、作业历史等说再见。
config.cache_store = :file_store
# or
config.cache_store = :mem_cache_store

namespace :cache do
  task :clear do
    FileUtils.rm_rf(Dir['tmp/cache/[^.]*'])
    `mkdir -p tmp/cache/001/000/`
  end
end