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?

score 21 · Answer 1 · edited Sep 03 '18 at 05:40

21

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!!');

edited Sep 03 '18 at 05:40

Pang

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answered Aug 31 '18 at 18:35

davewy

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Thank you for clarifying the usage of `winston.createLogger`. The readme states using "your own logger" as the recommended way. Nevertheless I would rather prefer to use the "default logger" which is also listed within the [readme](https://github.com/winstonjs/winston#using-the-default-logger). Unfortunately, when using `winston.configure()` there is still the same notice in console as described in my original question. – tertek Oct 02 '18 at 21:37
That may be a bug worth opening a GH issue for. There are still some kinks with the 3.0 release that are being worked on, this may be one of them. – davewy Nov 05 '18 at 21:47

score 9 · Answer 2 · answered Jul 20 '19 at 03:16

9

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' }))

answered Jul 20 '19 at 03:16

Ssendikadiwa Stephen

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Hope it helps out someone new who might come across this error as of late – Ssendikadiwa Stephen Jul 20 '19 at 03:19

score 5 · Accepted Answer · answered Nov 18 '18 at 17:14

5

I also had a similar issue. If I recall correctly, I had to call the requirement as a function in my index.js.

require('./logging')();

answered Nov 18 '18 at 17:14

GCQ

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

3 Answers3