来自rails 3中的therubyracer/v8的javascript错误的堆栈跟踪

Question

我正在使用therubyracer和v8在rails 3 app中运行一些javascript

如果出现任何问题,错误消息将通过电子邮件通过常见的rails 3异常通知过程发送给我.

但是,我收到的错误消息非常模糊,堆栈跟踪不会进入javascript文件本身.这是可以理解的,但是很难调试.这是一个例子:

V8::JSError: Cannot read property '0' of undefined
backtrace:

lib/libraryname.rb:32:in `function_that_calls_v8'
lib/libraryname.rb:18:in `fetch_and_update'
app/models/listing.rb:34:in `fetch'

有没有办法我可以暴露javascript stacktrace,以便在抛出异常时让我可以告诉javascript里面的哪些行是borking？(至少,得到行号)

Answer 1

我认为你可以使用V8错误类，尝试这样做

begin
  #normal V8 code


rescue V8::Error => error
  error.value #the JavaScript value passed to the `throw` statement
  error.cause #the underlying error (if any) that triggered this error to be raised
  error.javascript_backtrace #the complete JavaScript stack at the point this error was thrown
  #use these values and send them to the exception system (however that happenS)
end

老实说，我不知道这是否有效，但尝试一下