Rails 5.0 将字符串或符号传递给中间件构建器弃用警告

Question

rails 5.0、ruby 2.6.4

我正在将应用程序升级到 rails 5.0。我目前正在尝试解决一些弃用警告。这是一个我找不到任何帮助的问题，我不确定还能去哪里找。

DEPRECATION WARNING: Passing strings or symbols to the middleware builder is deprecated, please change
them to actual class references.  For example:

  "CatchRequestErrors" => CatchRequestErrors

我只在两个文件中找到“CatchRequestErrors”：

app/middleware/catch_request_errors.rb

class CatchRequestErrors
  def initialize(app)
    @app = app
  end

  def call(env)
    begin
      @app.call(env)
    rescue ActionController::BadRequest => error
      ::Rails.logger.warn("WARN: 400 ActionController::BadRequest: #{env['REQUEST_URI']}")
      @html_400_page ||= File.read(::Rails.root.join('public', '400.html'))
      [
          400, { "Content-Type" => "text/html" },
          [ @html_400_page ]
      ]
    end
  end
end

和

config/application.rb

# Middleware that catches the ActionController::BadRequest error, logs it and returns a 400 error page
config.middleware.insert_before Rack::Head, "CatchRequestErrors"

我进行了一些谷歌搜索，但没有发现任何关于如何解决此问题的突出问题。

config/application.rb 中的行是否有特定的语法？

Answer 1

改变

config.middleware.insert_before Rack::Head, "CatchRequestErrors"

到

config.middleware.insert_before Rack::Head, CatchRequestErrors

假设它已正确加载，您应该没问题。

Rails 5.0 将字符串或符号传递给中间件构建器弃用警告

Rails 5.0 Passing strings or symbols to the middleware builder Deprecation Warning

middleware

ruby-on-rails-5