如何使用Winston 3记录完整堆栈跟踪？ [英] How to Log Full Stack Trace with Winston 3?

问题描述

我的记录器设置如下：

const myFormat = printf(info => {
   return `${info.timestamp}: ${info.level}: ${info.message}: ${info.err}`;
 });


 const logger =
   winston.createLogger({
   level: "info",
   format: combine(timestamp(), myFormat),

   transports: [
     new winston.transports.File({
     filename:
      "./logger/error.log",
        level: "error"
    }),
     new winston.transports.File({
       filename:
       "./logger/info.log",
       level: "info"
   })
  ]
})

然后我退出了像这样的错误：

Then I am logging out some error like this:

logger.error(`GET on /history`, { err });

如何通过错误传输记录错误的完整堆栈跟踪？我尝试传入err.stack，它出现了未定义。

How is it possible to log the full stack trace for errors to via the error transport? I tried passing in the err.stack and it came out as undefined.

谢谢！

推荐答案

你可以写一个格式化程序来传递 error.stack 来记录。

You can write a formatter to pass error.stack to log.

const errorStackFormat = winston.format(info => {
  if (info instanceof Error) {
    return Object.assign({}, info, {
      stack: info.stack,
      message: info.message
    })
  }
  return info
})

const logger = winston.createLogger({
  transports: [ ... ],
  format: winston.format.combine(errorStackFormat(), myFormat)
})

logger.info(new Error('yo')) // => {message: 'yo', stack: "Error blut at xxx.js:xx ......"} 

（输出将取决于您的配置）

(the output will depend on your configuration)

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