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我不确定为什么会发生这种情况，但这让我发疯。我正在尝试将 rails 更新4.1.1到最新的稳定版本4.2.6。更新没有发生任何奇怪的事情，资产现在列在 assets.rb 中。

我发现它在将sprocketsgem更新为 时会刹车3.5.2，因此将其强制恢复为2.11.0，但这不是解决方法。

但是在开发模式下，config.assets.debug = true头文件没有链接样式表，为什么？！

如果我尝试rake assets:precompile创建的文件是空的。我忘记了什么吗？

标题

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

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports and disable caching.
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = false

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations.
  config.active_record.migration_error = :page_load

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = true

  # 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

  # Adds additional error checking when serving assets at runtime.
  # Checks for improperly declared sprockets dependencies.
  # Raises helpful error messages.
  config.assets.raise_runtime_errors = true

  # Raises error for missing translations
  # config.action_view.raise_on_missing_translations = true
end

和布局；

!!! 5
%html
  %head
    %meta{content: "IE=edge", "http-equiv" => "X-UA-Compatible"}
    %meta{content: "width=device-width, initial-scale=1, user-scalable=no", name: "viewport"}

    = stylesheet_link_tag 'default', media: 'all', 'data-turbolinks-track' => true
    = javascript_include_tag 'default', 'data-turbolinks-track' => true

Rails.application.config.assets.precompile += %w( default.css )在资产.rb

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