ruby-on-rails – Rails 4.2.5 – 无法将“config.serve_static_files”升级为“config.public_f

当我使用新的Rails 5.1方法’public_file_server.enabled’配置我的production.rb文件时,我无法预编译我的资产,然后部署我的应用程序(在Heroku上).

这是我在运行“RAILS_ENV =生产包exec rake assets：precompile”后看到的错误：

rake aborted!
NoMethodError: undefined method `public_file_server' for #<Rails::Application::Configuration:0x007f81f0624b60>
/Users/jmarbach/Documents/rubyscripts/concorde/config/environments/production.rb:21:in `block in <top (required)>'
/Users/jmarbach/Documents/rubyscripts/concorde/config/environments/production.rb:1:in `<top (required)>'
/Users/jmarbach/Documents/rubyscripts/concorde/config/environment.rb:5:in `<top (required)>'

以下是我的production.rb文件中的相关行：

# Leverage browser caching
config.static_cache_control = 'public, max-age=1000'

# Set header expiray date
config.public_file_server.enabled = true
config.public_file_server.headers = {
  'Cache-Control' => 'public, s-maxage=31536000, maxage=15552000',
  'Expires' => "#{1.year.from_now.to_formatted_s(:rfc822)}"
  }

这是我的gem文件中的rails配置：

gem 'rails', '4.2.5'
gem 'railties', '4.2.5'

如何访问新合并的方法’public_file_server’？

正如您在问题中指出的那样,“public_file_server”是Rails 5.0的一项功能.正如您的gemfile所示,您正在运行rails 4.2.5.您需要升级到Rails 5.0.