Formatting example

It took me long time to figure out some simple formatting. The examples I found with a formatter function, simply did not work for me. Finally I got this working:

  logger.add(new winston.transports.File({
    level: 'info', // Log this level and all higher priorities
    filename: 'myfile.log',
    format: winston.format.combine(
      winston.format(options => {
        return {
          'level': options.level,
          'message': options.message,
          'my_own_nr': 12345,
          'nice_text': 'hello there'
        }
      })(),
      winston.format.timestamp(),
      winston.format.json()
    )
  }))

Maybe good to add to documentation?

[xiulunlin]

+1 Don’t know how to configure

[fourpastmidnight]

There is a comment on #1430 which resolves the issue with info “losing data” between transports.