winston: Attempt to write logs with no transports - using default logger

Question

I followed a tutorial to set up winston (2.x) default logger in my express app. When updating to the current version of winston (3.0.0) I have a problem with adding the transports. I have followed the latest docs but still I get the notice in console and no log files are created at all:

[winston] Attempt to write logs with no transports

logging.js

const winston = require('winston');  module.exports = function () {    const files = new winston.transports.File({ filename: 'logfile.log' });   const myconsole = new winston.transports.Console();    winston.add(myconsole);   winston.add(files);  } 

index.js

const winston = require('winston'); ...  require('./logging'); winston.info("Give some info"); 

[winston] Attempt to write logs with no transports {"message":"Give some info","level":"info"}

What am I doing wrong?

Answer 1

In winston 3 you need to create a logger object, then add transports to it.

Winston 3 has many examples, but to adapt from the readme, do something like this:

const logger = winston.createLogger({   level: 'info',   format: winston.format.json(),   transports: [     new winston.transports.Console(),     new winston.transports.File({ filename: 'logfile.log' })   ] });  logger.info('it works!!'); 

Answer 2

If you want to use the default logger in winston v3 then you simply have to add this piece of code in your main file

const winston = require('winston')  winston.add(new winston.transports.File({ filename: 'logfile.log' }))