actionpack/lib/action_controller/metal/asset_paths.rb


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require 'action_controller/metal/exceptions'

module ActionController
  module AssetPaths
    extend ActiveSupport::Concern

    include AbstractController::AssetPaths

    def invalid_asset_host!(help_message)
      raise ActionController::RoutingError, "This asset host cannot be computed without a request in scope. #{help_message}"
    end
  end
end