how to store logs into mysql db using winston in Node.js - mysql

Question

I am doing logging for my application using winston. I have done the file transport using this:
class LoggerHelper extends BaseHelper {
constructor(_cApp) {
super(_cApp);
this._props = {};
}
initialize() {
this._prepareConfigs();
this._createTransportObj();
this._createLoggerObj();
}
_prepareConfigs() {
this._props.dirname = this._configs.logsFolder;
this._props.filename = this._configs.filenameConvention;
this._props.datePattern = this._configs.datePattern;
this._props.maxSize = this._configs.maxSize;
this._props.level = this._configs.level;
this._props.timestamp = this._configs.timestamp;
this._props.prettyPrint = this._configs.prettyPrint;
}
_createTransportObj() {
var DailyRotateFile = winston.transports.DailyRotateFile;
this._transport = new DailyRotateFile(this._props);
}
_createLoggerObj() {
this._logger = winston.createLogger({
transports: [this._transport],
exitOnError: false
});
}
_log(type, error, description, stage, vars) {
var logMsg = {};
var msg = '';
var fileIndex = 3;
if(this._isError(error)) {
var err = error;
msg = error.message;
fileIndex = 1;
} else {
var err = new Error();
msg = error;
}
var caller_line = err.stack.split("at ")[fileIndex];
var index = caller_line.indexOf("(");
var lastIndex = caller_line.lastIndexOf(")");
index = caller_line.slice(index + 1, lastIndex);
var line = index.match(/:[0-9]+:/).toLocaleString();
line = line.replace(/[^0-9]/g, '');
var curTime = new FE.utils.date();
var timestamp = curTime.format('YYYY-MM-DD HH:MM:SS');
logMsg.level = type || 'info';
logMsg.time = timestamp || '';
logMsg.msg = msg || '';
logMsg.desc = description || '';
logMsg.stg = stage || '000';
logMsg.file = index || 'Not Found';
logMsg.stack = err.stack || 'Not Found';
logMsg.line = line || 'Not Found';
var logStr = JSON.stringify(logMsg);
this._logger.log(type, logMsg);
}
info(error, description, stage, vars) {
return this._log('info', error, description, stage, vars);
}
error(error, description, stage, vars) {
return this._log('error', error, description, stage, vars);
}
warn(error, description, stage, vars) {
return this._log('warn', error, description, stage, vars);
}
verbose(error, description, stage, vars) {
return this._log('verbose', error, description, stage, vars);
}
debug(error, description, stage, vars) {
return this._log('debug', error, description, stage, vars);
}
silly(error, description, stage, vars) {
return this._log('silly', error, description, stage, vars);
}
/**
* Checks if value is an Error or Error-like object
* #static
* #param {Any} val Value to test
* #return {Boolean} Whether the value is an Error or Error-like object
*/
_isError(val) {
return !!val && typeof val === 'object' && (
val instanceof Error || (
val.hasOwnProperty('message') && val.hasOwnProperty('stack')
)
);
}
}
module.exports = LoggerHelper;
Now I want to store my logs into a mysql db table as well. I did come across a winston plugin for Mongo but I don't see any support for storing it into a mysql db. Is there a way I can achieve this?
Thanks in advance.

Answer 1

I was facing the same issue recently. after doing some research I found one package 'winston-sql-transport' to save logs into mysql.
see this:
const { Logger } = require('winston');
const { SQLTransport } = require('./../lib/winston-sql-transport');
const logger = new Logger({
transports: [
new SQLTransport({
tableName: 'winston_logs',
})]
});
module.exports = logger;