Node.js 如何将expressWinston放入特定的类/服务中？

因此，我有以下代码：

const loggingWinston = new LoggingWinston({
    projectId: CLOUD_PROJECT_ID,
    keyFilename: CLOUD_KEY_FILE,
  });
  // winston configuration for dev
  const alignColorsAndTime = winston.format.combine(
    winston.format.colorize({ all: true }),
    winston.format.label({ label: '[LOG]' }),
    winston.format.timestamp({ format: 'YY-MM-DD HH:MM:SS' }),
    winston.format.printf(
      (info) => ` ${info.label}  ${info.timestamp}  ${info.level} : ${info.message}`,
    ),
  );

  app.use(expressWinston.logger({
    level: 'info',
    transports: [
      DEV
        ? new winston.transports.Console({ format: winston.format.combine(winston.format.colorize(), alignColorsAndTime) })
        : loggingWinston,
    ],
    meta: true,
    expressFormat: true, // Use the default Express/morgan request formatting.
    colorize: true, // Color the text and status code, using the Express/morgan color palette.
  }));

这很好用

现在，我想从index.ts中删除此逻辑，并将其放入名为WinstonService的新类中

我很挣扎，因为无论我从那门课上得到什么，我都会这样使用它：

let winstonService = new WinstonService(DEV);
app.use(winstonService.getExpressConfiguration());

export class WinstonService {

    private dev: boolean;
    private loggingWinston: LoggingWinston;
    private alignColorsAndTime;

    constructor(dev: boolean){

        if (!dev){
            this.loggingWinston = new LoggingWinston({
              projectId: CLOUD_PROJECT_ID,
              keyFilename: CLOUD_KEY_FILE,
            });
        }

        // winston configuration for dev
        this.alignColorsAndTime = winston.format.combine(
          winston.format.colorize({ all: true }),
          winston.format.label({ label: '[LOG]' }),
          winston.format.timestamp({ format: 'YY-MM-DD HH:MM:SS' }),
          winston.format.printf(
            (info) => ` ${info.label}  ${info.timestamp}  ${info.level} : ${info.message}`,
          ),
        );
    }

    public getExpressConfiguration(){
        return expressWinston.logger({
            level: 'info',
            transports: [
              this.dev
                ? new winston.transports.Console({ format: winston.format.combine(winston.format.colorize(), this.alignColorsAndTime) })
                : this.loggingWinston,
            ],
            meta: true,
            expressFormat: true, // Use the default Express/morgan request formatting.
            colorize: this.dev, // Color the text and status code, using the Express/morgan color palette.
        });
    }
}

export default new WinstonService(this.dev);

我得到：

"UnhandledPromiseRejectionWarning: Error: Invalid transport, must be an object with a log method."

我现在的班级是这样的：

let winstonService = new WinstonService(DEV);
app.use(winstonService.getExpressConfiguration());

export class WinstonService {

    private dev: boolean;
    private loggingWinston: LoggingWinston;
    private alignColorsAndTime;

    constructor(dev: boolean){

        if (!dev){
            this.loggingWinston = new LoggingWinston({
              projectId: CLOUD_PROJECT_ID,
              keyFilename: CLOUD_KEY_FILE,
            });
        }

        // winston configuration for dev
        this.alignColorsAndTime = winston.format.combine(
          winston.format.colorize({ all: true }),
          winston.format.label({ label: '[LOG]' }),
          winston.format.timestamp({ format: 'YY-MM-DD HH:MM:SS' }),
          winston.format.printf(
            (info) => ` ${info.label}  ${info.timestamp}  ${info.level} : ${info.message}`,
          ),
        );
    }

    public getExpressConfiguration(){
        return expressWinston.logger({
            level: 'info',
            transports: [
              this.dev
                ? new winston.transports.Console({ format: winston.format.combine(winston.format.colorize(), this.alignColorsAndTime) })
                : this.loggingWinston,
            ],
            meta: true,
            expressFormat: true, // Use the default Express/morgan request formatting.
            colorize: this.dev, // Color the text and status code, using the Express/morgan color palette.
        });
    }
}

export default new WinstonService(this.dev);

---

有什么建议吗？非常感谢。

现有代码对DEV===true和false都有效吗？唯一让我感到不合适的是

导出默认的新WinstonService（this.dev）

，它在模块作用域中是错误的

构造函数中也没有设置this.dev

。除非ts有魔法？