When I tried to log using winston logger, I am not able to see the id and error properly in nodejs.
Here is the logger.js file:
const path = require('path');
const winston = require('winston');
module.exports = function (app) {
global.logger = new Logger(app.config.get('app').logLevel);
};
function Logger(logLevel='info') {
return winston.createLogger({
levels: {alert: 0, error: 1, warn: 2, info: 3, verbose: 4, debug: 5, silly: 6},
level: logLevel,
transports: [
new (winston.transports.Console)({level: logLevel}),
new (require('winston-daily-rotate-file'))({filename: path.resolve(__dirname + '/../../logs/app.log')})
]
});
}
In Customer.js, I tried to log like this:
logger.warn('Failed to update patient during user(%s) creation', userInstance.id, err);
This is what I am getting as output:
{"_bsontype":"ObjectID","id":{"type":"Buffer","data":[93,0,225,203,227,175,68,1,61,50,162,194]},"level":"warn","message":"Failed to update patient during user(%s) creation"}
Please correct me if I am wrong.
From winston's doc :
The log method provides the string interpolation using util.format. It must be enabled using format.splat().
It seems you need to specify it during the logger initialization. From the same link:
const logger = createLogger({
format: format.combine(
format.splat(),
format.simple()
),
transports: [new transports.Console()]
});
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