• action_dispatch/http/rack_cache
• rack/cache

• 模块 ActionDispatch
• 模块 ActiveRecord
• 模块 ActiveRecord::Middleware
• 模块 Rails
• 类 ActionDispatch::ContentSecurityPolicy
• 类 ActionDispatch::PermissionsPolicy
• 类 Rails::Application
• 类 Rails::Application::DefaultMiddlewareStack