我有一个方法CustomGoogleDirections

class CustomGoogleDirections < GoogleDirections
  @@base_url = "https://maps.googleapis.com/maps/api/directions/xml"
end

我在我的控制器中调用它来基于散列找到位置：

@locations = @all_locations.each_cons(2).with_index.with_object({}) do |((e1, e2), i), h|
  h[i + 1] =
    [e1, e2,
     CustomGoogleDirections.new(e1, e2, key: Figaro.env.google_translate_secret_key).distance_in_miles, CustomGoogleDirections.new(e1, e2, key: Figaro.env.google_translate_secret_key).drive_time_in_minutes.url]
end

这将导致错误：

Errno::ENOENT (No such file or directory @ rb_sysopen - https://maps.googleapis.com/maps/api/directions/xml?destination=60%2BBarron%2BRoad%252C%2BDubai%252C%2BDubai&key=######################&origin=60%2BAlFhaged%2BRoad%252C%2BDubai%252C%2Dubai)

在我升级Rails之前，它曾经工作得很好。请问有没有人知道我错过了什么？
(When我使用了生成的xml链接，它确实正确加载了所有long/lat信息）