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Comments (7)

gremo avatar gremo commented on May 23, 2024

You're right, the first argument of nestLike is just the application name. In order to use "dynamic" label you could use the context argument or setContext method?

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ShareinSK avatar ShareinSK commented on May 23, 2024

@gremo @TrejGun @kierans When using NestWinston for bootstrapping it does not provide the setContext method.

constructor(
    @Inject(Logger) private readonly logger: LoggerService) {
    }

Can you provide an example of how to do that?

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TrejGun avatar TrejGun commented on May 23, 2024

@ShareinSK enjoy

import {Injectable} from "@nestjs/common";
import {WinstonModuleOptions, WinstonModuleOptionsFactory} from "nest-winston/dist/winston.interfaces";
import {format, transports} from "winston";
import cls from "cli-color";

@Injectable()
export class WinstonConfigService implements WinstonModuleOptionsFactory {
  createWinstonModuleOptions(): WinstonModuleOptions {
    return {
      format: format.combine(format.errors({stack: true}), format.timestamp()),
      transports: [
        new transports.Console({
          format: format.printf(args => {
            const {level, context, timestamp, message, stack, trace} = args;
            let color = cls.green;
            let text = "";
            if (level === "error") {
              color = cls.red;
              const lines = (stack || trace).split("\n");
              lines[0] = color(lines[0]);
              text = lines.join("\n");
            } else if (level === "info") {
              color = cls.green;
              text = color(message);
            } else if (level === "warn") {
              color = cls.yellow;
              text = color(message);
            } else if (level === "debug") {
              color = cls.magentaBright;
              text = color(message);
            } else if (level === "verbose") {
              color = cls.cyanBright;
              text = color(message);
            }

            return `${color(`[Nest] ${process.pid}   -`)} ${new Date(timestamp).toLocaleString()}   ${
              context ? cls.yellow("[" + context + "]") : ""
            } ${text}`;
          }),
        }),
      ],
    };
  }
}
@Module({
  imports: [
    WinstonModule.forRootAsync({
      useClass: WinstonConfigService,
    }),
    // ...
  ],
})
export class ApplicationModule {}
async function bootstrap(): Promise<void> {
  const app = await NestFactory.create(ApplicationModule);

  app.useLogger(app.get(WINSTON_MODULE_NEST_PROVIDER));

  // ...
}
@Controller("/controller")
export class MyController {
  constructor(
    @Inject(WINSTON_MODULE_NEST_PROVIDER)
    private readonly logger: LoggerService,
  ) {}

  @Post("/method")
  public async method(): Promise<void> {
    this.logger.log(`BOOM!`);
  }
}

i dont remember why it is like this. this code is year old

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ShareinSK avatar ShareinSK commented on May 23, 2024

@TrejGun Thanks for the example, it worked.

But in the given example, the context needs to be added as a second arg to every logger command.

Is there an option to initialize the logger inside the class constructor with the context, so that everytime the context need not be specified in a class.

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TrejGun avatar TrejGun commented on May 23, 2024

ask @gremo

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ShareinSK avatar ShareinSK commented on May 23, 2024

@gremo Is there an option to initialize the logger inside the class constructor with the context, so that everytime the context need not be specified in a class.

If we could do something like

_logger: any;
constructor(@Inject(WINSTON_MODULE_NEST_PROVIDER) private logger: LoggerService) {
    this._logger = logger.setContext('ClassName');
}

async test() {
    this._logger.log('Hello World');
}

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ShareinSK avatar ShareinSK commented on May 23, 2024

Closing this but opening a new ticket for single instantiation of logger.

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