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winston.transports.DailyRotateFile is not a constructor

See original GitHub issue

When I try the example setup, I run into an exception.

var winston = require('winston');
winston.cli();

var transport = new (winston.transports.DailyRotateFile)({
    filename: 'logs/log',
    datePattern: 'yyyy-MM-dd.',
    prepend:true,
    level: "verbose",
    maxDays:0
});

winston.add(transport);

Gives me:

TypeError: winston.transports.DailyRotateFile is not a constructor at Object.<anonymous> (/home/project/Backend/node-server/logger.js:8:17) at Module._compile (module.js:570:32) at Object.Module._extensions…js (module.js:579:10) at Module.load (module.js:487:32) at tryModuleLoad (module.js:446:12) at Function.Module._load (module.js:438:3) at Module.require (module.js:497:17) at require (internal/module.js:20:19) at Object.<anonymous> (/home/project/Backend/node-server/server.js:3:14) at Module._compile (module.js:570:32)

Node Version v6.10.3 NPM Version 3.10.10 Winston 2.3.1 Winston-Daily-Rotate-File 1.7.0

Running on Ubuntu 16.04.3

Issue Analytics

State:
Created 6 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

7reactions

mgaracommented, Jul 2, 2019

Hello Does this work ?

const { format, createLogger, addColors, transports: winstonTransports } = require('winston');

require('winston-daily-rotate-file');

  const rotateFileTransport = new (winstonTransports.DailyRotateFile)({
      filename: FILE_ROTATION_FILENAME,
      datePattern: 'YYYY-MM-DD',
      prepend: true,
      zippedArchive: true,
      json: false,
      level: LOGGING_LEVEL
    });

    transports.push(rotateFileTransport) // transports is an array passed to the logger instance

Becasue my code is triggering the exact same issue here …

winston : 3.2.1
winston-daily-rotate-file : 3.9.0

Update and if you came here from google : Solution is @ #205

import { createLogger, transports } from "winston";
import DailyRotateFile = require("winston-daily-rotate-file");

const logger = createLogger({
    transports: [
        new DailyRotateFile({
        })
    ]
});

1reaction

mattberthercommented, Sep 14, 2017

I dont see require('winston-daily-rotate-file');

What happens with:

var winston = require('winston');
require('winston-daily-rotate-file');
winston.cli();

var transport = new (winston.transports.DailyRotateFile)({
    filename: 'logs/log',
    datePattern: 'yyyy-MM-dd.',
    prepend:true,
    level: "verbose",
    maxDays:0
});

winston.add(transport);