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Railsファイルキャッシュをクリアするにはどうすればよいですか？

Ubuntu 14.04でRails 4.2.7を実行しています。PostGres9.5データベースに対するヒットを防ぐために、一部のデータをキャッシュするために次のメソッドを記述しました...

class Country < ActiveRecord::Base
  has_many :states

  def self.cached_find_by_iso(iso)
    Rails.cache.fetch("#{iso}") do
      find_by_iso(iso)
    end
  end

end

ただし、rake tmp：cache：clearを実行してサーバーを再起動した後でも、上記を起動しようとするとこのエラーが発生します…

Error during processing: Not a directory @ rb_file_s_rename - (/home/Rails/myproject/tmp/cache/00020161104-1093-67j634, /home/Rails/myproject/tmp/cache/001/000/)
/usr/local/rvm/rubies/Ruby-2.3.0/lib/Ruby/2.3.0/fileutils.rb:528:in `rename'
/usr/local/rvm/rubies/Ruby-2.3.0/lib/Ruby/2.3.0/fileutils.rb:528:in `block in mv'
/usr/local/rvm/rubies/Ruby-2.3.0/lib/Ruby/2.3.0/fileutils.rb:1571:in `block in fu_each_src_dest'
/usr/local/rvm/rubies/Ruby-2.3.0/lib/Ruby/2.3.0/fileutils.rb:1587:in `fu_each_src_dest0'
/usr/local/rvm/rubies/Ruby-2.3.0/lib/Ruby/2.3.0/fileutils.rb:1569:in `fu_each_src_dest'
/usr/local/rvm/rubies/Ruby-2.3.0/lib/Ruby/2.3.0/fileutils.rb:517:in `mv'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/core_ext/file/atomic.rb:36:in `atomic_write'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache/file_store.rb:83:in `write_entry'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache/strategy/local_cache.rb:115:in `write_entry'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache.rb:391:in `block in write'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache.rb:547:in `block in instrument'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications.rb:166:in `instrument'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache.rb:547:in `instrument'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache.rb:389:in `write'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache.rb:588:in `save_block_result_to_cache'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache.rb:299:in `fetch'
/home/Rails/myproject/app/models/country.rb:5:in `cached_find_by_iso'
/home/Rails/myproject/app/services/all_events_guide_service.rb:84:in `block in process_page_data'
/usr/local/rvm/gems/Ruby-2.3.0/gems/nokogiri-1.6.8.1/lib/nokogiri/xml/node_set.rb:187:in `block in each'
/usr/local/rvm/gems/Ruby-2.3.0/gems/nokogiri-1.6.8.1/lib/nokogiri/xml/node_set.rb:186:in `upto'
/usr/local/rvm/gems/Ruby-2.3.0/gems/nokogiri-1.6.8.1/lib/nokogiri/xml/node_set.rb:186:in `each'
/home/Rails/myproject/app/services/all_events_guide_service.rb:45:in `process_page_data'
/home/Rails/myproject/app/services/abstract_import_service.rb:83:in `process_my_object_data'
/home/Rails/myproject/app/services/all_events_guide_my_object_Finder_service.rb:103:in `block in process_my_object_link'
/usr/local/rvm/gems/Ruby-2.3.0/gems/nokogiri-1.6.8.1/lib/nokogiri/xml/node_set.rb:187:in `block in each'
/usr/local/rvm/gems/Ruby-2.3.0/gems/nokogiri-1.6.8.1/lib/nokogiri/xml/node_set.rb:186:in `upto'
/usr/local/rvm/gems/Ruby-2.3.0/gems/nokogiri-1.6.8.1/lib/nokogiri/xml/node_set.rb:186:in `each'
/home/Rails/myproject/app/services/all_events_guide_my_object_Finder_service.rb:82:in `process_my_object_link'
/home/Rails/myproject/app/services/abstract_my_object_Finder_service.rb:29:in `block in process_data'
/home/Rails/myproject/app/services/abstract_my_object_Finder_service.rb:28:in `each'
/home/Rails/myproject/app/services/abstract_my_object_Finder_service.rb:28:in `process_data'
/home/Rails/myproject/app/services/run_crawlers_service.rb:18:in `block in run_all_crawlers'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activerecord-4.2.7.1/lib/active_record/relation/delegation.rb:46:in `each'
/usr/local/rvm/gems/Ruby-2.3.0/gems/activerecord-4.2.7.1/lib/active_record/relation/delegation.rb:46:in `each'
/home/Rails/myproject/app/services/run_crawlers_service.rb:5:in `run_all_crawlers'
/home/Rails/myproject/app/controllers/my_objects_controller.rb:170:in `block in import'

キャッシュをクリアし、キャッシュされたメソッドを適切に動作させる正しい方法は何ですか？

編集： Deepakの提案で上記と同じエラーが発生しますが、彼の答えへの出力は次のとおりです...

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

編集2： これが私のconfig/environments.production.rbファイルです。これは実稼働環境です…

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
ruby-on-railsruby-on-rails-4cachingtmp
15
Dave

の代わりに rake tmp:cache:clearコンソールで次のコマンドを実行します

Rails.cache.clear

これにより、使用しているキャッシュストアからキャッシュがクリアされます。

config.cache_store = :file_store
# or
config.cache_store = :mem_cache_store
46
Deepak Mahakale

アプリケーションが何らかの形でパスtmp/cache/001/000/の存在を要求しているようです。そして、あなたが見ることができるように： https://github.com/Rails/rails/blob/4-2-stable/railties/lib/Rails/tasks/tmp.rake#L25-L 、タスクrake tmp:cache:clearはtmp/cacheを含む001/000からすべてのコンテンツを削除しました。簡単な解決策は、キャッシュをクリアした後、プロジェクトルート内でmkdir -p tmp/cache/001/000/によってそのパスを手動で作成することだと思います。

アプリケーションにカスタムタスクを追加して、Rails g task cacheでこれを自動化し、次のように記述できます。

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

その後、カスタムrake cache:clearを呼び出して、要求されたパスが存在することを確認できます。

2
Tom König