Shared Transports

I am having trouble setting up shared transports.

I am using this method to add the shared transports:

winston.loggers.add('some-category', {
    transports: [
      // Setup your shared transports here
    ]
});

Basically, I have two types of loggers one “debugLogger”, and then a large number of “specificDebugLoggers”. I want the specific debug loggers to each get their own file, but I also want them to log output to the main debug file.

However, when I try and share the transports, I get this error:

Error: Transport already attached: file

Here is what I am doing:

debugFileTransport = {
    filename: '/var/log/mycoolapp/debug.log',
};

// Here is how the main debug log is created.
winston.loggers.add('debugLogger', {
  transports: [
    new winston.transports.File(debugFileTransport)  // Here is the shared transport
  ]
});

// And here is how the specific debug logs get created.
createLogger = function(name, filepath) {
  winston.loggers.add(name, {
    transports: [
      new winston.transports.File(debugFileTransport), // Here is the shared transport
      new winston.transports.File({
        filename: filepath,
      })
    ]
  });
  return winston.loggers.get(name);
};

[yhpark]

@ash211 @gdbtek or anyone who see this thread, You should set name field in the option. It’s being used to detect duplicate transports.

new winston.transports.File({ filename: './logs/error.log', name: 'file.error', level: 'error' }),
new winston.transports.File({ filename: './logs/info.log', name: 'file.info', level: 'info' }),
new winston.transports.File({ filename: './logs/debug.log', name: 'file.debug', level: 'debug' })

[sudosean]

Hi, I have followed along with the docs and these past issues. I no longer receive the original issues but I am only getting output to one file :

const winston = require(`winston`);

winston.level = 'debug';

winston.configure({
    transports: [
        new (winston.transports.File)({ filename: 'logs/info.log', name: 'file.info', level: 'info'}),
        new (winston.transports.File)({ filename: 'logs/warn.log', name: 'file.error', level: 'error'})
    ]
});


module.exports = winston;