DailyRotateFileTransport class is not a constructor

import winston, { format } from 'winston';
import 'winston-daily-rotate-file';
const { combine, timestamp, prettyPrint } = format;

const logger = winston.createLogger({
  format: combine(
    timestamp(),
    prettyPrint()
  ),
  transports: [
    new winston.transports.DailyRotateFileTransport({
      dirname: './logs/errors',
      filename: 'error.%DATE%.log',
      datePattern: 'HH:mm'
    })
  ]
});

Whether I declare a transport object of DailyRotateFileTransport class, I get an error

new winston_1.default.transports.DailyRotateFileTransport({
^

TypeError: winston_1.default.transports.DailyRotateFileTransport is not a constructor

Could you tell me if it happens because of using typescript or there is another reason?

[JE-lee]

you shoule chage the import statement .

import * as winston from 'winston';
import 'winston-daily-rotate-file';
import { WinstonModule } from 'nest-winston';

export function getWinstonModule() {
  const transport = new winston.transports.DailyRotateFile({
    filename: 'application-%DATE%.log',
    datePattern: 'YYYY-MM-DD-HH',
    zippedArchive: true,
    maxSize: '20m',
    maxFiles: '14d',
  });

  transport.on('rotate', function (oldFilename, newFilename) {
    // do something fun
  });

  return WinstonModule.forRoot({
    transports: [transport],
  });
}

my winston-daily-rotate-file’ version is ^4.5.1.

[mykhailo-budish]

Im not at all familiar with typescript. That’s a question for @Slessi. However, what happens if you change winston.transports.DailyRotateFileTransport to winston.transports.DailyRotateFile?

The same thing. But I have found a solution in

import winston, { format } from 'winston';
import DailyRotateFile from 'winston-daily-rotate-file';

const errorTransport = new DailyRotateFile({
  dirname: 'logs/errors',
  filename: 'error.%DATE%.log',
  datePattern: 'DD-MM-YYYY',
  level: 'error'
});