Extend NestJS Logger (old version) - where can i set LogLevels

Question

I create a extended logger based like the answer of Ian: Issue with using Azure Applications Insights sdk with NestJS logger

NestJS old version:

export class MyLogger extends Logger {

Normally you can set the log-level for the nestjs logger:

const app = await NestFactory.create(AppModule, {
  logger: ['error', 'warn'],
});

But how can i set the LogLevels if i extend the Logger.

const app = await NestFactory.create(AppModule);
const logger = await app.resolve(MyLogger);
logger.setClient(appInsights.defaultClient);
app.useLogger(logger);

Answer 1

• If your application uses a custom logger class that extends the built-in Logger, you should update it to extend the ConsoleLogger now.

Before:

export class MyLogger extends Logger {}

Now:

export class MyLogger extends ConsoleLogger {}

extend the built-in ConsoleLogger class

export class MyLogger extends ConsoleLogger

const app = await NestFactory.create(ApplicationModule, {
  bufferLogs: true,
});
app.useLogger(app.get(MyLogger));
await app.listen(3000);

• extend the logger built into NestJS and use the LogsService

Please refer Extend built-in logger , this for more information